Trial Outcomes & Findings for Evaluation of a New Cardiac Biomarker Assay (NCT NCT01608100)

NCT ID: NCT01608100

Last Updated: 2015-03-17

Results Overview

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating the Area Under the Curve (AUC). The Area Under the Curve that was assessed, is used to determine the optimum clinical sensitivity and specificity for the ARCHITECT STAT High Sensitive Troponin-I assay. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Recruitment status

COMPLETED

Study phase

PHASE3

Target enrollment

1101 participants

Primary outcome timeframe

Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department

Results posted on

2015-03-17

Participant Flow

Participant milestones

Participant milestones
Measure
ARCHITECT STAT High Sensitive Troponin I Assay Testing
All subjects will have their blood tested by the investigational Troponin I assay. ARCHITECT STAT High Sensitive Troponin I Assay: Test blood samples from the ARCHITECT STAT High Sensitive Troponin I Assay. Results obtained will be used to assess the prognosis of subjects for risk of ACM/MACE in the time frames (30 days and 90 days) after the Emergency Department visit. Troponin results will be compared to documented ACM/MACE events at the 30 day and 90 day time points after Emergency Department visit.
Overall Study
STARTED
1101
Overall Study
COMPLETED
1101
Overall Study
NOT COMPLETED
0

Reasons for withdrawal

Withdrawal data not reported

Baseline Characteristics

Evaluation of a New Cardiac Biomarker Assay

Baseline characteristics by cohort

Baseline characteristics by cohort
Measure
ARCHITECT STAT High Sensitive Troponin I Assay Testing
n=1101 Participants
All subjects will have their blood tested by the investigational ARCHITECT STAT High Sensitive Troponin I assay. Specimens were collected at 11 emergency departments from 1,101 subjects presenting to the emergency department with symptoms consistent with acute coronary syndrome (ACS). All subject diagnoses were adjudicated by three board certified cardiologists according to current standard of care.
Age, Categorical
<=18 years
0 Participants
n=5 Participants
Age, Categorical
Between 18 and 65 years
746 Participants
n=5 Participants
Age, Categorical
>=65 years
355 Participants
n=5 Participants
Sex: Female, Male
Female
482 Participants
n=5 Participants
Sex: Female, Male
Male
619 Participants
n=5 Participants
Race/Ethnicity, Customized
Black
300 participants
n=5 Participants
Race/Ethnicity, Customized
White
692 participants
n=5 Participants
Race/Ethnicity, Customized
Hispanic
62 participants
n=5 Participants
Race/Ethnicity, Customized
Asian
18 participants
n=5 Participants
Race/Ethnicity, Customized
Other
29 participants
n=5 Participants
Observed Myocardial Infarction Prevalence
Number Participants with Myocardial Infarction
130 participants
n=5 Participants
Observed Myocardial Infarction Prevalence
Number Participants without Myocardial Infarction
971 participants
n=5 Participants

PRIMARY outcome

Timeframe: Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department

Population: The number of subjects for analysis was determined by the number of subjects with at least one collection time point in the respective tube type (K2 EDTA, Lithium Heparin Separator, Serum Separator). Not all time points or collection tube types were able to be collected for all subjects.

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating the Area Under the Curve (AUC). The Area Under the Curve that was assessed, is used to determine the optimum clinical sensitivity and specificity for the ARCHITECT STAT High Sensitive Troponin-I assay. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1066 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1088 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1029 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Clinical Performance - Area Under the Curve
Area Under the Curve: 4-9 hours
0.9503 Probability
Interval 0.9419 to 0.9857
0.9498 Probability
Interval 0.919 to 0.9805
0.9449 Probability
Interval 0.9046 to 0.9852
Clinical Performance - Area Under the Curve
Area Under the Curve: 0-2 hours
0.9326 Probability
Interval 0.9048 to 0.9604
0.9197 Probability
Interval 0.8914 to 0.948
0.9412 Probability
Interval 0.9102 to 0.9722
Clinical Performance - Area Under the Curve
Area Under the Curve: 2-4 hours
0.9431 Probability
Interval 0.9081 to 0.9782
0.9349 Probability
Interval 0.8986 to 0.9712
0.9419 Probability
Interval 0.9041 to 0.9796

PRIMARY outcome

Timeframe: Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department

Population: The number of subjects for analysis was determined by the number of subjects with at least one collection time point in the respective tube type (K2 EDTA, Lithium Heparin Separator, Serum Separator). Not all time points or collection tube types were able to be collected for all subjects.

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating Sensitivity. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1066 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1088 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1029 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Clinical Performance- Sensitivity
% Sensitivity: 0-2 hours
84.44 percentage MI withTnI >cutoff vs all MI
Interval 75.28 to 91.23
85.26 percentage MI withTnI >cutoff vs all MI
Interval 76.51 to 91.7
87.32 percentage MI withTnI >cutoff vs all MI
Interval 77.3 to 94.04
Clinical Performance- Sensitivity
% Sensitivity: 2-4 hours
92.21 percentage MI withTnI >cutoff vs all MI
Interval 83.81 to 97.09
91.86 percentage MI withTnI >cutoff vs all MI
Interval 83.95 to 96.66
92.00 percentage MI withTnI >cutoff vs all MI
Interval 83.4 to 97.01
Clinical Performance- Sensitivity
% Sensitivity: 4-9 hours
93.90 percentage MI withTnI >cutoff vs all MI
Interval 86.34 to 97.99
94.95 percentage MI withTnI >cutoff vs all MI
Interval 88.61 to 98.34
93.15 percentage MI withTnI >cutoff vs all MI
Interval 84.74 to 97.74

PRIMARY outcome

Timeframe: Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department.

Population: The number of subjects for analysis was determined by the number of subjects with at least one collection time point in the respective tube type (K2 EDTA, Lithium Heparin Separator, Serum Separator). Not all time points or collection tube types were able to be collected for all subjects.

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating Specificity. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1066 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1088 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1029 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Clinical Performance- Specificity
% Specificity: 0-2 hours
85.73 % nonMI with TnI </= cutoff vs all nonMI
Interval 83.18 to 88.03
83.76 % nonMI with TnI </= cutoff vs all nonMI
Interval 81.12 to 86.17
86.35 % nonMI with TnI </= cutoff vs all nonMI
Interval 83.79 to 88.63
Clinical Performance- Specificity
% Specificity: 2-4 hours
85.20 % nonMI with TnI </= cutoff vs all nonMI
Interval 82.66 to 87.5
83.72 % nonMI with TnI </= cutoff vs all nonMI
Interval 81.09 to 86.11
85.81 % nonMI with TnI </= cutoff vs all nonMI
Interval 83.31 to 88.07
Clinical Performance- Specificity
% Specificity: 4-9 hours
82.82 % nonMI with TnI </= cutoff vs all nonMI
Interval 79.99 to 85.4
80.72 % nonMI with TnI </= cutoff vs all nonMI
Interval 77.82 to 83.39
84.05 % nonMI with TnI </= cutoff vs all nonMI
Interval 81.31 to 86.54

PRIMARY outcome

Timeframe: Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department.

Population: The number of subjects for analysis was determined by the number of subjects with at least one collection time point in the respective tube type (K2 EDTA, Lithium Heparin Separator, Serum Separator). Not all time points or collection tube types were able to be collected for all subjects.

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating Negative Predictive Value. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1066 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1088 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1029 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Clinical Performance- Negative Predictive Value (NPV)
% NPV: 0-2 hours
98.10 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 96.82 to 98.95
98.08 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 96.81 to 98.95
98.73 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 97.61 to 99.42
Clinical Performance- Negative Predictive Value (NPV)
% NPV: 2-4 hours
99.19 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.25 to 99.7
99.05 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.05 to 99.62
99.20 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.27 to 99.71
Clinical Performance- Negative Predictive Value (NPV)
% NPV: 4-9 hours
99.23 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.22 to 99.75
99.24 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.22 to 99.75
99.25 %nonMI,TnI</=cutoff vs all TnI</=cutoff
Interval 98.26 to 99.76

PRIMARY outcome

Timeframe: Troponin value from three collection time points (0-2 hours, >2 and up to 4 hours, >4 hours and up to 9 hours) from subject presentation to the emergency department.

Population: The number of subjects for analysis was determined by the number of subjects with at least one collection time point in the respective tube type (K2 EDTA, Lithium Heparin Separator, Serum Separator). Not all time points or collection tube types were able to be collected for all subjects.

The ARCHITECT STAT High Sensitive Troponin-I assay clinical performance was evaluated by calculating the Positive Predictive Value. The ARCHITECT STAT High Sensitive Troponin-I assay results were generated from subject's specimens collected at three collection time points in three tube types (K2 EDTA, Lithium Heparin Separator and Serum Separator).

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1066 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1088 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1029 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Clinical Performance- Positive Predictive Value (PPV)
% PPV: 0-2 hours
38.78 %MI,TnI >cutoff vs all TnI > cutoff
Interval 31.92 to 45.98
36.82 %MI,TnI >cutoff vs all TnI > cutoff
Interval 30.43 to 43.56
35.84 %MI,TnI >cutoff vs all TnI > cutoff
Interval 28.7 to 43.47
Clinical Performance- Positive Predictive Value (PPV)
% PPV: 2-4 hours
35.68 %MI,TnI >cutoff vs all TnI > cutoff
Interval 29.03 to 42.76
35.75 %MI,TnI >cutoff vs all TnI > cutoff
Interval 29.43 to 42.45
35.94 %MI,TnI >cutoff vs all TnI > cutoff
Interval 29.16 to 43.16
Clinical Performance- Positive Predictive Value (PPV)
% PPV: 4-9 hours
36.49 %MI,TnI >cutoff vs all TnI > cutoff
Interval 29.99 to 43.38
37.75 %MI,TnI >cutoff vs all TnI > cutoff
Interval 31.71 to 44.09
35.05 %MI,TnI >cutoff vs all TnI > cutoff
Interval 28.36 to 42.21

SECONDARY outcome

Timeframe: 30-day and 90-day follow-up

Population: 30 Day and 90-day prognosis (Kaplan Meier analysis) and Hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) are summarized. \*Censored is defined as the subject has not experienced ACM/MACE at the indicated follow-up time point.

Specimens were collected at 11 EDs from 1,101 subjects presenting to the ED with symptoms consistent with ACS. All subject diagnoses were adjudicated by three board certified cardiologists according to current standard of care. ARCHITECT STAT High Sensitive Troponin I results were generated from subject specimens and evaluated for use as an aid in the assessment of prognosis. Analyses used the first available troponin result from multiple serial draw time points. Subjects were assessed for risk of all cause mortality (ACM) and major adverse cardiac event (MACE) at 30 day and 90 day time points after ED discharge. MACE consisted of myocardial infarction, urgent revascularization, and cardiac death. Subjects were followed-up for subsequent events by medical record review and/or subject/caregiver contact. Any ACM and MACE that occurred during the ED visit and on the same day as ED discharge were not included in the analyses.

Outcome measures

Outcome measures
Measure
Area Under the Curve in K2 EDTA
n=1064 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using K2 EDTA tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Lithium Heparin Separator
n=1064 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Lithium Heparin tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
Area Under the Curve in Serum Separator
n=1085 Participants
Area Under the Curve for the ARCHITECT High Sensitive Troponin I was evaluated using Serum tube type for 3 collection time points. The results were calculated using the overall 99th percentile cutoff (26.2 pg/mL).
90-day Prognosis for Lithium Heparin Separator Tube Type
n=1085 Participants
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
30-day Prognosis for Serum Separator Tube Type
n=1027 Participants
The 30-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
90-day Prognosis for Serum Separator Tube Type
n=1027 Participants
The 90-day prognosis (Kaplan-Meier analysis) and hazard ratios (Cox regression) for the overall 99th percentile cutoff (26.2 pg/mL) were calculated.
Prognosis
MACE/ACM with Troponin value </= cutoff
19 participants
30 participants
17 participants
30 participants
17 participants
29 participants
Prognosis
No MACE/ACM (*Censored) with TnI value </= cutoff
802 participants
791 participants
803 participants
790 participants
796 participants
784 participants
Prognosis
MACE/ACM with Troponin value > cutoff
17 participants
31 participants
19 participants
34 participants
13 participants
26 participants
Prognosis
No MACE/ACM (*Censored) with TnI value > cutoff
226 participants
212 participants
246 participants
231 participants
201 participants
188 participants

Adverse Events

ARCHITECT STAT High Sensitive Troponin I Assay Testing

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

Serious adverse events

Adverse event data not reported

Other adverse events

Adverse event data not reported

Additional Information

Karla Grasso, Clinical Research Manager

Abbott Diagnostics Division

Phone: 1 224-667-5602

Results disclosure agreements

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

Restriction type: GT60