The Dual Antiplatelet Therapy Study (DAPT Study)
![]() |
The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. |
ClinicalTrials.gov Identifier: NCT00977938 |
Recruitment Status :
Completed
First Posted : September 16, 2009
Results First Posted : October 22, 2015
Last Update Posted : June 9, 2017
|
Sponsor:
Baim Institute for Clinical Research
Collaborators:
Abbott
Boston Scientific Corporation
Bristol-Myers Squibb
Sanofi-Synthelabo
Cordis Corporation
Eli Lilly and Company
Daiichi Sankyo, Inc.
Medtronic
Information provided by (Responsible Party):
Baim Institute for Clinical Research
- Study Details
- Tabular View
- Study Results
- Disclaimer
- How to Read a Study Record
Study Type | Interventional |
---|---|
Study Design | Allocation: Randomized; Intervention Model: Parallel Assignment; Masking: Triple (Participant, Care Provider, Investigator); Primary Purpose: Treatment |
Condition |
Coronary Artery Disease |
Interventions |
Drug: Placebo & Aspirin Drug: Clopidogrel & Aspirin, Prasugrel & Aspirin |
Enrollment | 25682 |
Participant Flow
Recruitment Details | Between 08/13/2009 and 07/01/2011, a total of 25682 patients were enrolled into the DAPT Study either by HCRI (NCT00977938; 14491 pts) or from 1 of 4 PMS studies: Abbott Xience V US (NCT01106534; 2998 pts), Boston Scientific Liberté PAS (NCT00997503; 3904 pts), Cordis CYPRESS (NCT00954707; 2029 pts) and Medtronic EDUCATE (NCT01069003; 2260 pts). |
Pre-assignment Details |
Arm/Group Title | DES 30-month DAPT | DES 12-month DAPT | BMS 30-month DAPT | BMS 12-month DAPT |
---|---|---|---|---|
![]() |
Of the 22,866 DES enrolled pts, a total of 9,961 pts underwent randomization at 12 months (4,941 to 12m DAPT and 5,020 to 30m DAPT). | Of the 22,866 DES enrolled pts, a total of 9,961 pts underwent randomization at 12 months (4,941 to 12m DAPT and 5,020 to 30m DAPT). | Of the 2,816 BMS enrolled pts, a total of 1,687 pts underwent randomization at 12 months (845 to 12-month DAPT and 842 to 30-month DAPT). | Of the 2,816 BMS enrolled pts, a total of 1,687 pts underwent randomization at 12 months (845 to 12-month DAPT and 842 to 30-month DAPT). |
Period Title: Treatment (12-30 mo. Post Procedure) | ||||
Started | 5020 | 4941 | 842 | 845 |
Completed | 4783 | 4716 | 796 | 784 |
Not Completed | 237 | 225 | 46 | 61 |
Reason Not Completed | ||||
Withdrawal by Subject | 132 | 116 | 13 | 20 |
Lost to Follow-up | 88 | 91 | 30 | 37 |
Other | 17 | 18 | 3 | 4 |
Period Title: Observation (30-33 mo. Post Procedure) | ||||
Started | 4783 | 4716 | 796 | 784 |
Completed | 4732 | 4658 | 784 | 781 |
Not Completed | 51 | 58 | 12 | 3 |
Reason Not Completed | ||||
Withdrawal by Subject | 9 | 12 | 2 | 0 |
Lost to Follow-up | 34 | 42 | 10 | 3 |
Other | 8 | 4 | 0 | 0 |
Baseline Characteristics
Arm/Group Title | DES 30-month DAPT | DES 12-month DAPT | BMS 30-month DAPT | BMS 12-month DAPT | Total | |
---|---|---|---|---|---|---|
![]() |
Patients who were treated with DES at the index procedure and were randomized at 12 months post procedure to receive a total of 30 months of DAPT | Patients who were treated with DES at the index procedure and were randomized at 12 months post procedure to receive a total of 12 months of DAPT | Patients who were treated with BMS at the index procedure and were randomized at 12 months post procedure to receive a total of 30 months of DAPT | Patients who were treated with BMS at the index procedure and were randomized at 12 months post procedure to receive a total of 12 months of DAPT | Total of all reporting groups | |
Overall Number of Baseline Participants | 5020 | 4941 | 842 | 845 | 11648 | |
![]() |
[Not Specified]
|
|||||
Age, Continuous
Mean (Standard Deviation) Unit of measure: Years |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
61.84 (10.18) | 61.60 (10.12) | 58.86 (10.54) | 59.18 (11.07) | 61.33 (10.29) | ||
Sex: Female, Male
Measure Type: Count of Participants Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
Female |
1242 24.7%
|
1284 26.0%
|
215 25.5%
|
184 21.8%
|
2925 25.1%
|
|
Male |
3778 75.3%
|
3657 74.0%
|
627 74.5%
|
661 78.2%
|
8723 74.9%
|
|
Race/Ethnicity, Customized
[1] Measure Type: Number Unit of measure: Participants |
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants |
American Indian or Alaska Native | 17 | 41 | 0 | 2 | 60 | |
Asian | 48 | 35 | 3 | 2 | 88 | |
Black or African American | 252 | 253 | 38 | 33 | 576 | |
Native Hawaiian or Other Pacific Islander | 13 | 9 | 1 | 1 | 24 | |
White | 4480 | 4428 | 768 | 774 | 10450 | |
Other | 108 | 106 | 20 | 23 | 257 | |
[1]
Measure Description: Race was self-reported
|
||||||
Region of Enrollment
Measure Type: Number Unit of measure: Participants |
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants |
North America | 4502 | 4416 | 509 | 519 | 9946 | |
Europe | 402 | 405 | 304 | 300 | 1411 | |
Australia | 47 | 55 | 14 | 12 | 128 | |
New Zealand | 69 | 65 | 15 | 14 | 163 | |
weight
Mean (Standard Deviation) Unit of measure: Kg |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
91.49 (19.74) | 91.52 (19.43) | 87.99 (18.40) | 88.54 (18.77) | 91.04 (19.48) | ||
Body Mass Index (BMI)
Mean (Standard Deviation) Unit of measure: Kg/m2 |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
30.54 (5.79) | 30.55 (5.77) | 29.49 (5.18) | 29.61 (5.55) | 30.40 (5.73) | ||
Diabetes Mellitus
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1556 | 1481 | 181 | 173 | 3391 | ||
Hypertension
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
3796 | 3649 | 534 | 543 | 8522 | ||
Current cigarette smoker or within past year
[1] Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1222 | 1210 | 360 | 350 | 3142 | ||
[1]
Measure Description:
"Current cigarette smoker or within past year" was defined as follows:
|
||||||
Stroke/Transient Ischemic Attack (TIA)
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
155 | 169 | 43 | 34 | 401 | ||
Congestive heart failure
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
238 | 223 | 35 | 28 | 524 | ||
Peripheral arterial disease
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
284 | 284 | 35 | 46 | 649 | ||
Prior percutaneous coronary intervention (PCI)
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1518 | 1529 | 150 | 171 | 3368 | ||
Prior coronary artery bypass graf (CABG)
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
568 | 581 | 50 | 50 | 1249 | ||
Prior myocardial infarction (MI)
Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1092 | 1026 | 160 | 178 | 2456 | ||
Indication for PCI
[1] Measure Type: Number Unit of measure: Participants |
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants |
ST elevation MI (STEMI) | 534 | 511 | 311 | 324 | 1680 | |
Non-ST elevation MI (NSTEMI) | 776 | 767 | 184 | 169 | 1896 | |
Unstable angina | 838 | 825 | 77 | 81 | 1821 | |
Stable angina | 1882 | 1870 | 199 | 198 | 4149 | |
Other | 990 | 968 | 71 | 73 | 2102 | |
[1]
Measure Description: "Unstable angina" includes unstable angina without reported elevation of cardiac enzymes
|
||||||
Any risk factor for stent thrombosis
[1] Measure Type: Number Unit of measure: Participants |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
2410 | 2389 | 568 | 569 | 5936 | ||
[1]
Measure Description:
Any clinical or lesion-related risk factors for stent thrombosis. Clinical risk factors for stent thrombosis included:
Lesion-related risk factors for stent thrombosis included:
|
||||||
Number of treated lesions (per-patient)
Mean (Standard Deviation) Unit of measure: Lesions |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1.30 (0.55) | 1.29 (0.54) | 1.16 (0.40) | 1.17 (0.42) | 1.28 (0.53) | ||
Number of treated vessels (per-patient)
Mean (Standard Deviation) Unit of measure: Vessels |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1.11 (0.33) | 1.12 (0.34) | 1.03 (0.18) | 1.05 (0.23) | 1.11 (0.32) | ||
Number of stents (per-patient)
Mean (Standard Deviation) Unit of measure: Stents |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
1.47 (0.75) | 1.45 (0.75) | 1.32 (0.60) | 1.32 (0.60) | 1.44 (0.73) | ||
Minimum stent diameter (per-patient)
Measure Type: Number Unit of measure: Participants |
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants |
<3 mm | 2341 | 2293 | 201 | 206 | 5041 | |
≥3 mm | 2679 | 2648 | 641 | 639 | 6607 | |
Total stent length (per-patient)
Mean (Standard Deviation) Unit of measure: Mm |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
27.70 (16.77) | 27.43 (17.02) | 23.96 (13.01) | 23.85 (13.12) | 27.04 (16.44) | ||
Treated Vessel
[1] Measure Type: Number Unit of measure: Lesions |
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants |
Left main | 55 | 55 | 0 | 1 | 111 | |
Left anterior descending (LAD) | 2715 | 2586 | 308 | 306 | 5915 | |
Right coronary artery (RCA) | 2153 | 2057 | 437 | 452 | 5099 | |
Circumflex | 1473 | 1506 | 206 | 207 | 3392 | |
Venous graft | 154 | 173 | 24 | 25 | 376 | |
Arterial graft | 36 | 30 | 0 | 0 | 66 | |
[1]
Measure Description: The 5,020 DES 30-month DAPT patients had a total of 6,594 lesions; The 4,941 DES 12-month DAPT patients had a total of 6,413 lesions; The 842 BMS 30-month DAPT patients had a total of 975 lesions; The 845 BMS 12-month DAPT patients had a total of 991 lesions
|
||||||
Modified ACC-AHA lesion class B2 or C
[1] Measure Type: Number Unit of measure: Lesions |
||||||
Number Analyzed | 5020 participants | 4941 participants | 842 participants | 845 participants | 11648 participants | |
2754 | 2643 | 440 | 450 | 6287 | ||
[1]
Measure Description: The 5,020 DES 30-month DAPT patients had a total of 6,594 lesions; The 4,941 DES 12-month DAPT patients had a total of 6,413 lesions; The 842 BMS 30-month DAPT patients had a total of 975 lesions; The 845 BMS 12-month DAPT patients had a total of 991 lesions; The definitions of class B2 and class C lesions according to the modified ACC/AHA criteria
|
Outcome Measures
Adverse Events