Trial Outcomes & Findings for Safety and Efficacy of Initializing the Control-IQ Artificial Pancreas System Using Total Daily Insulin (NCT NCT03804983)

NCT ID: NCT03804983

Last Updated: 2024-08-01

Results Overview

The primary outcome for this study is the percent of time spent between 70mg/dL and 180mg/dL as computed by the number of CGM values falling in this interval divided by the total number of available CGM values. CGM gaps inferior to 3 hours will be linearly interpolated.

Recruitment status

COMPLETED

Study phase

NA

Target enrollment

22 participants

Primary outcome timeframe

5 days post camp (home) compared to 5 days before camp (baseline)

Results posted on

2024-08-01

Participant Flow

Of 22 enrolled participants, 20 were randomized to treatment. One participant was dropped after meeting stopping criteria.

1 participant dropped prior to randomization for personal reasons (travel issues); 1 participant dropped prior to randomization as they didn't attend screening appointment.

Participant milestones

Participant milestones
Measure
Hybrid Closed Loop (HCL)
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Overall Study
STARTED
10
10
Overall Study
COMPLETED
9
9
Overall Study
NOT COMPLETED
1
1

Reasons for withdrawal

Reasons for withdrawal
Measure
Hybrid Closed Loop (HCL)
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Overall Study
Adverse Event
0
1
Overall Study
Family Obligation
1
0

Baseline Characteristics

Safety and Efficacy of Initializing the Control-IQ Artificial Pancreas System Using Total Daily Insulin

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
Hybrid Closed Loop (HCL)
n=10 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=10 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Total
n=20 Participants
Total of all reporting groups
Age, Categorical
<=18 years
10 Participants
n=5 Participants
10 Participants
n=7 Participants
20 Participants
n=5 Participants
Age, Categorical
Between 18 and 65 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Age, Categorical
>=65 years
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Age, Continuous
14.3 years
STANDARD_DEVIATION 1.7 • n=5 Participants
14.7 years
STANDARD_DEVIATION 1.6 • n=7 Participants
14.5 years
STANDARD_DEVIATION 1.65 • n=5 Participants
Sex: Female, Male
Female
5 Participants
n=5 Participants
5 Participants
n=7 Participants
10 Participants
n=5 Participants
Sex: Female, Male
Male
5 Participants
n=5 Participants
5 Participants
n=7 Participants
10 Participants
n=5 Participants
Race (NIH/OMB)
American Indian or Alaska Native
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Asian
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Native Hawaiian or Other Pacific Islander
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Black or African American
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
White
10 Participants
n=5 Participants
10 Participants
n=7 Participants
20 Participants
n=5 Participants
Race (NIH/OMB)
More than one race
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Race (NIH/OMB)
Unknown or Not Reported
0 Participants
n=5 Participants
0 Participants
n=7 Participants
0 Participants
n=5 Participants
Region of Enrollment
United States
10 participants
n=5 Participants
10 participants
n=7 Participants
20 participants
n=5 Participants

PRIMARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

The primary outcome for this study is the percent of time spent between 70mg/dL and 180mg/dL as computed by the number of CGM values falling in this interval divided by the total number of available CGM values. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percent Time in Range at Home Pre/Post Intervention at Home
Baseline
77.8 percentage of time spent in range
Standard Deviation 6.2
70.7 percentage of time spent in range
Standard Deviation 12.4
Percent Time in Range at Home Pre/Post Intervention at Home
Home
68.9 percentage of time spent in range
Standard Deviation 8.9
70.1 percentage of time spent in range
Standard Deviation 14.4

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

Average of available CGM values within time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Average CGM at Home
Baseline
142.4 mg/dL
Standard Deviation 13.6
152.2 mg/dL
Standard Deviation 19.2
Average CGM at Home
Week 2-Home Portion
156.5 mg/dL
Standard Deviation 14.9
152.9 mg/dL
Standard Deviation 21.2

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

average of CGM values within time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Average CGM at Camp
Baseline
142.4 mg/dL
Standard Deviation 13.6
152.2 mg/dL
Standard Deviation 19.2
Average CGM at Camp
Camp
144.3 mg/dL
Standard Deviation 24.6
141.3 mg/dL
Standard Deviation 13.1

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling below 50mg/dL, calculated as the number of CGM values \<50mg/dL within the time frame divided by the total number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 50mg/dL at Home
Baseline
0.0 percentage
Interval 0.0 to 0.3
0.0 percentage
Interval 0.0 to 0.1
Percentage of CGM Values Below 50mg/dL at Home
Home
0.0 percentage
Interval 0.0 to 0.1
0.6 percentage
Interval 0.0 to 0.8

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (Baseline)

the percentage of CGM values falling below 50mg/dL, computed as the number of CGM values \<50mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 50mg/dL at Camp
Baseline
0.0 percentage
Standard Deviation 0.0
0.0 percentage
Standard Deviation 0.0
Percentage of CGM Values Below 50mg/dL at Camp
Camp
0.3 percentage
Standard Deviation 0.7
0.16 percentage
Standard Deviation 0.36

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

the percentage of CGM values falling below 54mg/dL. computed as the number of CGM values \<54mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 54mg/dL at Camp
Baseline
0.1 percentage
Interval 0.0 to 0.6
0.1 percentage
Interval 0.0 to 0.3
Percentage of CGM Values Below 54mg/dL at Camp
Camp
0.0 percentage
Interval 0.0 to 0.0
0.0 percentage
Interval 0.0 to 0.7

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling below 60mg/dL. computed as the number of CGM values \<60mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 60mg/dL at Home
Baseline
0.7 percentage
Interval 0.2 to 1.1
0.7 percentage
Interval 0.0 to 0.8
Percentage of CGM Values Below 60mg/dL at Home
Home
0.5 percentage
Interval 0.0 to 0.6
1.3 percentage
Interval 0.1 to 1.8

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (Baseline)

the percentage of CGM values falling below 60mg/dL. computed as the number of CGM values \<60mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 60mg/dL at Camp
Baseline
0.7 percentage
Interval 0.2 to 1.1
0.7 percentage
Interval 0.0 to 0.8
Percentage of CGM Values Below 60mg/dL at Camp
Camp
0.5 percentage
Interval 0.0 to 0.5
0.9 percentage
Interval 0.0 to 2.3

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling below 70mg/dL, computed as the number of CGM values \<70mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 70mg/dL at Home
Baseline
1.9 percentage
Interval 0.6 to 5.3
2.1 percentage
Interval 0.7 to 3.2
Percentage of CGM Values Below 70mg/dL at Home
Home
0.9 percentage
Interval 0.3 to 1.9
2.4 percentage
Interval 0.7 to 3.7

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (Baseline)

the percentage of CGM values falling below 70mg/dL, computed as the number of CGM values \<70mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Below 70mg/dL at Camp
Baseline
1.9 percentage
Interval 0.6 to 5.3
2.1 percentage
Interval 0.7 to 3.2
Percentage of CGM Values Below 70mg/dL at Camp
Camp
1.4 percentage
Interval 0.0 to 2.4
3.8 percentage
Interval 0.5 to 4.7

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

the percentage of CGM values falling between 70mg/dL and 180mg/dL, computed as the number of CGM values \<=180mg/dL and \>70mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Between 70mg/dL and 180mg/dL at Camp
Baseline
77.8 percentage
Standard Deviation 6.2
70.7 percentage
Standard Deviation 12.4
Percentage of CGM Values Between 70mg/dL and 180mg/dL at Camp
Camp Portion
78.4 percentage
Standard Deviation 12.8
76.5 percentage
Standard Deviation 8.0

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling above 180mg/dL, computed as the number of CGM values \>180mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 180mg/dL at Home
Baseline
18.9 percentage
Standard Deviation 17.7
26.9 percentage
Standard Deviation 12.7
Percentage of CGM Values Above 180mg/dL at Home
Home
29.1 percentage
Standard Deviation 10.3
27.2 percentage
Standard Deviation 14.4

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

the percentage of CGM values falling above 180mg/dL, computed as the number of CGM values \>180mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 180mg/dL at Camp
Baseline
18.9 percentage
Standard Deviation 7.7
26.9 percentage
Standard Deviation 12.7
Percentage of CGM Values Above 180mg/dL at Camp
Camp
20.1 percentage
Standard Deviation 13.4
20.1 percentage
Standard Deviation 7.3

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling above 250mg/dL, computed as the number of CGM values \>250mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 250mg/dL at Home
Baseline
3.4 percentage
Interval 2.7 to 4.2
6.5 percentage
Interval 1.7 to 9.3
Percentage of CGM Values Above 250mg/dL at Home
Home
5.8 percentage
Interval 4.2 to 7.3
3.8 percentage
Interval 1.8 to 9.3

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

the percentage of CGM values falling above 250mg/dL, computed as the number of CGM values \>250mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 250mg/dL at Camp
Baseline
16 percentage
Standard Deviation 13.6
10 percentage
Standard Deviation 11.4
Percentage of CGM Values Above 250mg/dL at Camp
Camp
14.88 percentage
Standard Deviation 12.36
8.04 percentage
Standard Deviation 10.14

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

the percentage of CGM values falling above 300mg/dL, computed as the number of CGM values \>300mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 300mg/dL at Home
Baseline
0.3 percentage
Interval 0.0 to 0.8
0.3 percentage
Interval 0.0 to 2.2
Percentage of CGM Values Above 300mg/dL at Home
Home
0.7 percentage
Interval 0.2 to 3.2
0.9 percentage
Interval 0.0 to 2.7

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

the percentage of CGM values falling above 300mg/dL, computed as the number of CGM values \>300mg/dL within the time frame divided by the number of available CGM values within the time frame. CGM gaps inferior to 3 hours will be linearly interpolated.

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Percentage of CGM Values Above 300mg/dL at Camp
Baseline
0.3 percentage
Interval 0.0 to 0.8
0.3 percentage
Interval 0.0 to 2.2
Percentage of CGM Values Above 300mg/dL at Camp
Camp
0.0 percentage
Interval 0.0 to 1.0
0.0 percentage
Interval 0.0 to 0.0

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

sum of the recorded insulin injection over the time frame in units

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Total Daily Insulin at Home
Baseline
39.0 Units
Standard Deviation 7.3
48.7 Units
Standard Deviation 18.4
Change in Total Daily Insulin at Home
Home
48.2 Units
Standard Deviation 11.2
54.9 Units
Standard Deviation 29.0

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (baseline)

sum of the recorded insulin injection over the time frame in units

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Total Daily Insulin at Camp
Camp
38.8 Units
Standard Deviation 11.3
50.9 Units
Standard Deviation 27.5
Change in Total Daily Insulin at Camp
Baseline
39.0 Units
Standard Deviation 7.3
48.7 Units
Standard Deviation 18.4

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

sum of the meal sized recorded over the time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Total Meal Carbohydrates at Home
Baseline
226.3 Grams
Standard Deviation 38.6
204.1 Grams
Standard Deviation 100.4
Change in Total Meal Carbohydrates at Home
Home
276.5 Grams
Standard Deviation 94.5
192.6 Grams
Standard Deviation 115.4

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (Baseline)

sum of the meal sized recorded over the time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Total Meal Carbohydrates at Camp
Baseline
226.3 Grams
Standard Deviation 38.6
204.1 Grams
Standard Deviation 100.4
Change in Total Meal Carbohydrates at Camp
Camp
280.0 Grams
Standard Deviation 43.0
254.6 Grams
Standard Deviation 143.5

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp) compared to 5 days prior to camp (Baseline)

Sum of hypoglycemic events within the time frame. An event is defined by a group of consecutive CGM values below 70 mg/dL)

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Number of Hypoglycemic Events at Camp
Baseline
1 events per day
Interval 0.4 to 2.0
0.5 events per day
Interval 0.4 to 1.4
Change in Number of Hypoglycemic Events at Camp
Camp
1 events per day
Interval 0.0 to 1.0
1 events per day
Interval 0.5 to 2.5

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp)

Sum of the number of CHO treatments recorded over the time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Number of Hypoglycemia Treatment at Camp
1.5 events per day
Interval 1.0 to 2.5
2.5 events per day
Interval 0.0 to 3.0

SECONDARY outcome

Timeframe: 2 days during camp admission (Camp)

Sum of the amount of carbohydrates used for treatments recorded over the time frame

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Total Amount of Carbohydrates Corresponding to Hypoglycemia Treatment at Camp
35.9 grams per day
Standard Deviation 37
43.6 grams per day
Standard Deviation 35.2

SECONDARY outcome

Timeframe: 5 days post camp (home) compared to 5 days before camp (baseline)

change in number of hypoglycemia between baseline and home

Outcome measures

Outcome measures
Measure
Hybrid Closed Loop (HCL)
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=9 Participants
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Change in Hypoglycemia Events at Home
Baseline
1 events per day
Interval 0.4 to 2.0
0.6 events per day
Interval 0.4 to 1.4
Change in Hypoglycemia Events at Home
Home
0.3 events per day
Interval 0.2 to 0.8
0.7 events per day
Interval 0.2 to 1.3

Adverse Events

Hybrid Closed Loop (HCL)

Serious events: 0 serious events
Other events: 0 other events
Deaths: 0 deaths

Control-IQ With MyTDI

Serious events: 0 serious events
Other events: 1 other events
Deaths: 0 deaths

Serious adverse events

Adverse event data not reported

Other adverse events

Other adverse events
Measure
Hybrid Closed Loop (HCL)
n=10 participants at risk
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ with Hybrid Closed Loop (HCL) or the Control-IQ with MyTDI. Participants randomized to Control-IQ, participants will continue using their home insulin parameters during the ski admission and then 5 additional days at home. Hybrid Closed Loop (HCL): Participants will use Control-IQ with Hybrid Closed Loop (HCL) with their own insulin parameters during the entire two-week study, including the 72-hour ski admission and the at-home study collection times. Parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Control-IQ With MyTDI
n=10 participants at risk
Eligible participants will be screened and enter the data collection period for approximately 5 days at home. Prior to participating in the 72-hour ski admission, participants will be randomized 1:1 to the use of Control-IQ or the Control-IQ with MyTDI. Participants randomized to Control-IQ with MyTDI, participants will be adjusted as noted below during the ski admission and will then continue these parameters for 5 additional days at home: * A single basal rate equal to total daily insulin (TDI)/48 will be implemented across the whole day * A single correction factor (CF) of 1650/TDI will be implemented across the whole day * Carbohydrate ratios (CR) will be set at: * 00:00-04:00 CR=450/TDI * 04:00-11:00 CR=360/TDI * 11:00-00:00 CR=450/TDI TDI will be set at the internal Control-IQ estimation total daily dose; if not available, total daily dose over the last 5 days will be used. Control-IQ with MyTDI: Participants will use their own insulin parameters during the first 5 days of the study. After randomization at the ski admission, the participants insulin parameters will be modified using the MyTDI calculations. Additionally, parameters will be reduced 20% during the ski admission to adjust for the increased activity.
Endocrine disorders
Hyperglycemia or ketosis events without meeting criteria for Diabetes Ketoacidosis
0.00%
0/10 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation
10.0%
1/10 • Number of events 1 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation
Nervous system disorders
Concussion
0.00%
0/10 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation
10.0%
1/10 • Number of events 1 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation
Respiratory, thoracic and mediastinal disorders
Respiratory illness
0.00%
0/10 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation
10.0%
1/10 • Number of events 1 • 13 days
Any untoward medical occurrence in a study participant, irrespective of the relationship between the adverse event and the device(s) under investigation

Additional Information

Marc Breton, PhD

University of Virginia Center for Diabetes Technology

Phone: 434-982-6484

Results disclosure agreements

  • Principal investigator is a sponsor employee
  • Publication restrictions are in place