Trial Outcomes & Findings for The PortionSize Smartphone App Pilot (PS Pilot) (NCT NCT04494971)

Last Updated: 2024-11-19

Results Overview

Compared measurements from PortionSize to weighed values in the laboratory, which is the criterion measure.

Recruitment status

COMPLETED

Target enrollment

15 participants

Primary outcome timeframe

1 simulated meal collected on one day

Results posted on

2024-11-19

Participant milestones
Measure	Study Cohort The validity, reliability, and satisfaction of the PortionSize app under controlled and free-living conditions were quantified.
Overall Study STARTED	15
Overall Study COMPLETED	15
Overall Study NOT COMPLETED	0

Withdrawal data not reported

The PortionSize Smartphone App Pilot (PS Pilot)

Baseline characteristics by cohort
Measure	Study Cohort n=15 Participants The validity, reliability, and satisfaction of the PortionSize app under controlled and free-living conditions were quantified.
Age, Categorical <=18 years	NA Participants n=5 Participants
Age, Categorical Between 18 and 65 years	15 Participants n=5 Participants
Age, Categorical >=65 years	NA Participants n=5 Participants
Age, Continuous	28 years STANDARD_DEVIATION 12.2 • n=5 Participants
Sex: Female, Male Female	11 Participants n=5 Participants
Sex: Female, Male Male	4 Participants n=5 Participants
Ethnicity (NIH/OMB) Hispanic or Latino	0 Participants n=5 Participants
Ethnicity (NIH/OMB) Not Hispanic or Latino	15 Participants n=5 Participants
Ethnicity (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants
Race (NIH/OMB) American Indian or Alaska Native	0 Participants n=5 Participants
Race (NIH/OMB) Asian	0 Participants n=5 Participants
Race (NIH/OMB) Native Hawaiian or Other Pacific Islander	0 Participants n=5 Participants
Race (NIH/OMB) Black or African American	1 Participants n=5 Participants
Race (NIH/OMB) White	14 Participants n=5 Participants
Race (NIH/OMB) More than one race	0 Participants n=5 Participants
Race (NIH/OMB) Unknown or Not Reported	0 Participants n=5 Participants
Region of Enrollment United States	15 participants n=5 Participants

Timeframe: 1 simulated meal collected on one day

Compared measurements from PortionSize to weighed values in the laboratory, which is the criterion measure.

Outcome measures
Measure	Study Cohort n=15 Participants The validity of the PortionSize app under controlled (laboratory) conditions was quantified.
Validity of Portion Size at Estimating Energy Intake in Laboratory Conditions Mean energy intake estimated with the PortionSize app	742.9 kcal Standard Deviation 328
Validity of Portion Size at Estimating Energy Intake in Laboratory Conditions Mean energy intake estimated with the directly weighed food portions	659.3 kcal Standard Deviation 190.7

Timeframe: Mean kcal intake over 3 days

Quantify the validity of the app measurements in free-living conditions compared to digital photography (the criterion measure).

Outcome measures
Measure	Study Cohort n=14 Participants The validity of the PortionSize app under controlled (laboratory) conditions was quantified.
Validity of Portion Size at Estimating Energy Intake in Free-living Conditions Mean energy intake estimated with the PortionSize app	1560.6 kcal Standard Deviation 446.8
Validity of Portion Size at Estimating Energy Intake in Free-living Conditions Mean energy intake estimated with rater analysis of food photos	1349.7 kcal Standard Deviation 389.2

Serious events: 0 serious events

Other events: 0 other events

Deaths: 0 deaths

Adverse event data not reported

Adverse event data not reported

Pennington Biomedical Research Center

Phone: (225) 763-2832