Tablets, Oral, 0 mg, twice daily, until study end

Event rate was percent of participants with an event of stroke (number of participants with event/number randomized) per 100 patient (100-pt) years. Only events confirmed by the adjudication committee were included in the analyses. Diagnosis of stroke required a new, non-traumatic, focal neurological deficit of sudden onset, lasting at least 24 hours that was not due to a readily identifiable non-vascular cause (ie, brain tumor). All strokes were classified as hemorrhagic (documentation on imaging (eg computed tomography scan or magnetic resonance imaging) of hemorrhage in the cerebral parenchyma, or a subdural or subarachnoid hemorrhage), non-hemorrhagic/ischemic stroke, ischemic stroke with hemorrhagic conversion, or type unknown. Intended Treatment Period: the period that started on the day of randomization (Day 1) and ended at the efficacy cut-off date (notification of study termination).

MI took into account whether the participant had a recent percutaneous coronary intervention (PCI) or coronary artery bypass graft (CABG) surgery. Selected key criteria: Elevation of cardiac biomarkers (eg, Creatine Kinase MB fraction (CKMB), Troponin T, Troponin I) above the upper reference limit (URL) plus ischemic symptoms, ECG changes, or imaging evidence of new loss of viable myocardium or new regional wall motion abnormality; Death of CV etiology with new ST-segment elevation or left bundle branch block (LBBB) or fresh intracoronary thrombus by angiography or at autopsy occurring before biomarkers could be obtained or before their appearance in the blood; Following a PCI, elevation of cardiac biomarkers more than 3*URL; Following CABG surgery, elevation of cardiac biomarkers more than 5*URL; New, significant (≥0.04 s) Q waves in ≥2 contiguous leads; Pathologic findings of acute MI. Intended Treatment Period: Day of randomization (Day 1) to efficacy cut-off notice.

Stent thrombosis: Definite stent thrombosis considered to have occurred by either angiographic or pathological confirmation; Probable stent thrombosis considered to have occurred in the following cases: any unexplained death within the first 30 days after stent implantation; irrespective of the time after the procedure, any MI that was related to documented acute ischemia in the territory of the implanted stent without angiographic confirmation of stent thrombosis and in the absence of any other obvious cause; Possible stent thrombosis considered to have occurred with any unexplained death from 30 days after intracoronary stenting until end of study (in Year 2). Event rate was percent of participants with an event of stent thrombosis (number with event/number randomized) per 100-pt years. Only events confirmed by the adjudication committee were included in the analyses. Intended Treatment Period: Day of randomization (Day 1) to efficacy cut-off notice of study termination.

Event rate was percent of participants with an event of CV death, MI, unstable angina (UA), or ischemic stroke (number of participants with event/number randomized) per 100-pt years. Only events confirmed by the adjudication committee were included in the analyses. Each type of event was counted once per participant, but participants could have been counted in multiple categories. Intended Treatment Period: Day of randomization (Day 1) to efficacy cut-off date (notification of study termination).

Event rate was percent of participants with an event of CV death, fatal bleed, MI, or stroke (number of participants with event/number randomized) per 100 patient (100-pt) years. Only events confirmed by the adjudication committee were included in the analyses. CV death included deaths due to CV causes; Diagnosis of stroke required a new, non-traumatic, focal neurological deficit of sudden onset, lasting at least 24 hours that was not due to a readily identifiable non-vascular cause; Fatal bleeding defined as bleeding that Adjudication Committee determined was the primary cause of death or contributed directly to death; MI took into account whether the participant had a recent PCI or CABG surgery. Intended Treatment Period: Day of randomization (Day 1) to efficacy cut-off date (notification of study termination).

Cause of death was determined by the principal condition that caused the death, not the immediate mode of death.

CV death: included deaths due to CV causes. Non-CV death: included non-CV deaths caused primarily by a malignancy, infection, bleeding, trauma, non-CV system organ failure, or non-CV surgery. Unknown: included deaths that were not attributable to one of the above categories of CV death or to a non-CV cause. MI accounted whether the participant had a recent PCI or CABG surgery. Diagnosis of stroke required a new, non-traumatic, focal neurological deficit of sudden onset, lasting at least 24 hours that was not due to a readily identifiable non-vascular cause. Only events confirmed by the adjudication committee were included in analyses. Intended Treatment Period: Day of randomization (Day 1) to efficacy cut-off date (notification of study termination).

ISTH Criteria: Acute clinically overt bleeding defined as new onset, visible bleeding or signs or symptoms suggestive of bleeding confirmed by imaging techniques, which can detect the presence of blood (eg, ultrasound, CT, MRI). Major bleeding: acute clinically overt bleeding accompanied by one or more of the following: A decrease in Hgb of 2 g/dL or more over 24 hours; A transfusion of 2 or more units of packed red blood cells (RBCs); Bleeding that occurs in at least one of the following sites: intracranial, intraspinal, intraocular (within the corpus of the eye; thus, a conjunctival bleed is not an intraocular bleed), pericardial, intra-articular, intramuscular with compartment syndrome, retroperitoneal; Bleeding that was fatal. Bleeding events were adjudicated by the Adjudication Committee. Event rate was percent of participants with an event (number with event/number randomized) per 100-pt years. Treatment Period=events with onset from first dose to last dose plus 2 days.

ISTH Major bleed: acute clinically overt bleeding accompanied by one or more of the following: A decrease in Hgb of 2 g/dL or more over 24 hours; A transfusion of 2 or more units of packed RBCs; Bleeding that occurs in at least one of the following critical sites: intracranial, intraspinal, intraocular (within the corpus of the eye), pericardial, intra-articular, intramuscular with compartment syndrome, retroperitoneal; Bleeding that was fatal. CRNM: acute clinically overt bleeding that did not satisfy additional criteria required for the bleeding event to be defined as a major bleeding event and meets at least one of the following: Hospital admission for bleeding; Physician guided medical or surgical treatment for bleeding; Change in anti-thrombotic treatment (anticoagulant or antiplatelet) therapy. Bleeding events were adjudicated by the Adjudication Committee. Treatment Period=events with onset from first dose to last dose plus 2 days.

Bleeding events were adjudicated by the Adjudication Committee and classified according to Thrombolysis in Myocardial Infarction (TIMI) major, minor, minimal, and International Society on Thrombosis and Hemostasis (ISTH) major and clinically relevant non-major bleeding (CRNM) criteria. The adjudicated results based on TIMI and ISTH classifications, and programmatically identified events (not adjudicated) according to Global Use of Strategies to Open Occluded Coronary Arteries (GUSTO) classification were used in the analyses of bleeding endpoints. GUSTO Bleed Criteria included Severe or life-threatening: Intracranial hemorrhage, or bleeding that causes hemodynamic compromise requiring intervention; Moderate: Bleeding that requires a blood transfusion, but does not result in hemodynamic compromise; Mild: Bleeding that does not meet criteria for either severe or moderate bleeding. Treatment Period=events with onset from first dose to last dose plus 2 days.