Trial to Assess the Effects of Vorapaxar (SCH 530348; MK-5348) in Preventing Heart Attack and Stroke in Patients With Atherosclerosis (TRA 2°P - TIMI 50) (P04737)

Phase 3

Completed

Conditions: Atherosclerosis
Ischemia
Myocardial Infarction
Cerebrovascular Accident
Peripheral Arterial Disease

Interventions: Drug: Placebo
Drug: Vorapaxar

Registration Number: NCT00526474

Lead Sponsor: Merck Sharp & Dohme LLC

Brief Summary: The study is designed to determine whether vorapaxar, when added to the existing standard of care (SOC) for preventing heart attack and stroke (eg, aspirin, clopidogrel) in participants with a known history of atherosclerosis, will yield additional benefit over the existing standard of care without vorapaxar in preventing heart attack and stroke.

The study is also designed to assess risk of bleeding with vorapaxar added to the standard of care versus the standard of care alone.

Detailed Description: Not available

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 26449

Inclusion Criteria

Men and women at least 18 years old with evidence or a history of atherosclerosis involving the coronary, cerebral, or peripheral vascular systems by one or more of the following:

history of myocardial infarction (heart attack)
history of ischemic stroke (stroke due to a blocked artery)
history of peripheral arterial disease

Exclusion Criteria

history of intracranial hemorrhage or of central nervous system (CNS) surgery, tumor, or aneurysm
any bleeding disorder or abnormality
sustained severe hypertension or valvular heart disease
current or recent platelet count <100,000 mm^3
planned or ongoing treatment with a blood thinning medication
pregnancy
any significant medical or physiological condition or abnormality that could put the subject at increased risk or limit the subject's ability to participate for the duration of the study

Study & Design

Study Type: INTERVENTIONAL

Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo	Placebo	1 placebo tablet, orally, daily for at least 1 year in addition to current treatment of atherosclerotic disease, which will be continued to be administered as per current standard of care.
Vorapaxar	Vorapaxar	one 2.5 mg tablet daily, orally, for at least 1 year in addition to current treatment of atherosclerotic disease, which will be continued to be administered as per current standard of care.

Primary Outcome Measures

Name	Time	Method
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced Cardiovascular (CV) Death, Myocardial Infarction (MI), Stroke, or Urgent Coronary Revascularization (UCR) Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of any of the following clinical outcomes was recorded: CV death, MI, stroke, or UCR. A Clinical Endpoints Committee (CEC) reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death, MI, stroke, or UCR within 3 years from randomization.

Secondary Outcome Measures

Name	Time	Method
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced Clinically Significant Bleeding Within 3 Years From Randomization	up to 3 years	Adverse events were categorized as "bleeding events" if the intensity, frequency, or type of the event was other or more than would be normally expected in the given situation (eg, mild nosebleed in a person who does not normally have nosebleeds, greater bruising than expected for a given injury, greater volume of blood loss than expected for a given procedure). The investigator graded the intensity of bleeding events according to the Thrombolysis in Myocardial Infarction (TIMI) Study Group criteria as major, minor or other. "Clinically Significant Bleeding" was defined as the composite of TIMI Major bleeding, TIMI Minor bleeding, or bleeding that required unplanned medical or surgical treatment or unplanned laboratory evaluation even if it did not meet the criteria for TIMI major or minor bleeding. The Kaplan-Meier estimate reports the percentage of participants who experienced clinically significant bleeding within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced Death From Any Cause, MI, Stroke, or UCR Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the occurrence of any of the following clinical outcomes was recorded: death from any cause, MI, stroke, or UCR. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). The Kaplan-Meier estimate reports the percentage of participants who experienced death from any cause, MI, stroke, or UCR within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced CV Death or an MI Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the occurrence of CV death or MI. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death or MI within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced CV Death, MI, or Stroke Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of any of the following clinical outcomes was recorded: CV death, MI, or stroke. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death, MI, or stroke within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Met Global Utilization of Streptokinase and Tissue Plasminogen Activator for Occluded Arteries (GUSTO) Moderate or Severe Bleeding Criteria Within 3 Years From Randomization	up to 3 years	Adverse events were categorized as "bleeding events" if the intensity, frequency, or type of the event was other or more than would be normally expected in the given situation (eg, mild nosebleed in a person who does not normally have nosebleeds, greater bruising than expected for a given injury, greater volume of blood loss than expected for a given procedure). The investigator graded the intensity of bleeding events according to the GUSTO cooperative group criteria as follows: Mild , Moderate or Severe and the grading was adjudicated by the CEC. The Kaplan-Meier estimate reports the percentage of participants who experienced GUSTO moderate or severe bleeding within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced CV Death, MI, Stroke, UCR, or Urgent Hospitalization for Vascular Cause of Ischemic Nature (UH-VCIN) Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of any of the following clinical outcomes was recorded: CV death, MI, stroke, UCR or UH-VCIN. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death, MI, stroke, UCR, or UH-VCIN within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Died From Any Cause, or Experienced an MI, Stroke, or Any Revascularization Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to death from any cause or the first occurrence of any of the following clinical outcomes was recorded: MI, stroke, or any revascularization procedure . A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). The Kaplan-Meier estimate reports the percentage of participants who died from any cause, or experienced an MI, stroke, or any revascularization within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced CV Death, MI, Stroke, Any Revascularization, or UH-VCIN Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of any of the following clinical outcomes was recorded: CV death, MI, stroke, any revascularization, or UH-VCIN. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death, MI, stroke, any revascularization procedure, or UH-VCIN within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced CV Death Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to CV death (if reported) was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced CV death within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced an MI Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of an MI was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced an MI within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced UCR Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of UCR was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced UCR within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Experienced a Stroke Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to first experience of a stroke was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who experienced a stroke within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Died From Any Cause Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to death from any cause was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). The Kaplan-Meier estimate reports the percentage of participants who died from any cause within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Had a UH-VCIN Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of an UH-VCIN was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who had a UH-VCIN within 3 years from randomization.
Kaplan-Meier Estimate of the Percentage of Participants Who Had Any Revascularization Performed Within 3 Years From Randomization	up to 3 years	The time (in days) from study start to the first occurrence of a revascularization was recorded. A CEC reviewed and adjudicated each suspected efficacy endpoint event while blinded to treatment. Participants who did not have any endpoint event until last visit or participants who were lost to follow-up and had no event were censored at the time of last available information (last study visit). If a participant had a fatal event that was not part of a specific endpoint for analysis, they were censored at the time of death. The Kaplan-Meier estimate reports the percentage of participants who had any revascularization performed within 3 years from randomization.