Platelet-Oriented Inhibition in New TIA and Minor Ischemic Stroke (POINT) Trial
A transient ischemic attack (TIA) is a transient episode of neurological dysfunction caused by focal brain, spinal cord, or retinal ischemia, without acute infarction. An ischemic stroke is a cerebral infarction. In POINT, eligibility is limited to brain TIAs and to minor ischemic strokes (with an NIH Stroke Scale [NIHSS] score less than or equal to 3).
TIAs are common , and are often harbingers of disabling strokes. Approximately 250,000-350,000 TIAs are diagnosed each year in the US. Given median survival of more than 8 years , there are approximately 2.4 million TIA survivors. In a national survey, one in fifteen of those over 65 years old reported a history of TIA , which is equivalent to a prevalence of 2.3 million in older Americans. Based on the prevalence of undiagnosed transient neurological events, the true incidence of TIA may be twice as high as the rates of diagnosis . Based on our review of the National Inpatient Sample for 1997-2003, there were an average of 200,000 hospital admissions for TIA each year, with annual charges climbing quickly in the period to $2.6 billion in 2003.
Composite endpoint of new ischemic vascular events: ischemic stroke, myocardial infarction or ischemic vascular death at 90 days.
|Study Design:||Allocation: Randomized
Endpoint Classification: Efficacy Study
Intervention Model: Parallel Assignment
Masking: Double Blind (Subject, Investigator)
Primary Purpose: Treatment
|Official Title:||Platelet-Oriented Inhibition in New TIA and Minor Ischemic Stroke (POINT) Trial|
- New ischemic vascular events (ischemic stroke, myocardial infarction, and ischemic vascular death [ Time Frame: 90 days ] [ Designated as safety issue: Yes ]
- secondary outcomes will be evaluated, separately including risk of ischemic stroke, intracranial hemorrhage, and major hemorrhage, and the composite of the primary outcome and major hemorrhage. [ Time Frame: 90 days ] [ Designated as safety issue: Yes ]
|Study Start Date:||October 2009|
|Estimated Study Completion Date:||September 2016|
|Estimated Primary Completion Date:||June 2016 (Final data collection date for primary outcome measure)|
Active Comparator: clopidogrel
Patients assigned to clopidogrel in addition to aspirin
Loading dose of 600mg followed by 75 milligrams, oral, one tablet daily for 90 days
Other Name: Plavix
Placebo Comparator: placebo
Patients assigned to placebo in addition to aspirin
Loading dose of 8 tablets followed by one tablet daily for 90 days
Platelet-Oriented Inhibition in New TIA and minor ischemic stroke (POINT) Trial, is a prospective, randomized, double-blind, multicenter trial with the primary null hypothesis that, in patients with TIA or minor ischemic stroke treated with aspirin 50-325 mg/day, there is no difference in the event-free survival at 90 days in those treated with clopidogrel (600 mg loading dose then 75 mg/day) compared to placebo when subjects are randomized within 12 hours of time last known free of new ischemic symptoms.
Its primary objective is to determine whether clopidogrel 75 mg/day by mouth after a loading dose of 600 mg of clopidogrel is effective in preventing major ischemic vascular events (ischemic stroke, myocardial infarction, and ischemic vascular death) at 90 days when initiated within 12 hours of TIA or minor ischemic stroke onset in patients receiving aspirin 50-325 mg/day (with a dose of 162 mg daily for 5 days followed by 81 mg daily strongly recommended).
Patients over 18 years of age with high-risk TIA (defined as an ABCD2 score greater than or equal to 4) or minor ischemic stroke (with NIHSS less than or equal to 3) who can be treated within 12 hours of time last known free of new ischemic symptoms will be enrolled.
Subjects will be randomized 1:1 (clopidogrel: placebo), controlling for clinical center. A study participant's eligibility will be determined by site personnel prior to accessing the Randomization Module in the WebDCU™, a web-enabled clinical trials management system that was developed by the NETT Statistics and Data Management Center (SDMC) at Medical University of South Carolina (MUSC).Qualified users will access the Randomization Interface and complete a protocol-specific eligibility checklist. If the Randomization Interface finds the patient to be eligible based on the information provided, a randomization number and a confirmatory e-mail are generated.
Each subject is followed for 90 days from randomization; the trial will be completed in 7 years.
A total of 4,150 patients will be recruited. Recruitment will occur over 66 months, with a goal rate of 0.40 subjects/site/month for US sites, and a goal rate of 0.47 subjects/site/month for OUS sites.
|United States, California|
|University of California San Francisco Stroke Sciences Group||Recruiting|
|San Francisco, California, United States, 94158|
|Contact: Mary Farrant, MBA BSN RN 415-502-7304 email@example.com|
|Principal Investigator:||S. Claiborne Johnston, MD, PhD||University of California, San Francisco|
|Principal Investigator:||J. Donald Easton, MD||University of California, San Francisco|