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Stroke, Vol 19, 1203-1210, Copyright © 1988 by American Heart Association

ARTICLES

The Canadian American Ticlopidine Study (CATS) in thromboembolic stroke. Design, organization, and baseline results

M Gent, JA Blakely, JD Easton, DJ Ellis, VC Hachinski, JW Harbison, E Panak, RS Roberts, J Sicurella and AG Turpie
Faculty of Health Sciences, Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada.

The Canadian American Ticlopidine Study is a randomized, placebo- controlled, double-blind, multicenter study to assess the efficacy and safety of ticlopidine hydrochloride in patients who have suffered a thromboembolic stroke no less than 1 week and no more than 4 months before entry into the study. The primary assessment of efficacy will be based on the cluster of outcome events recurrent stroke, myocardial infarction, or vascular death. Twenty-five clinical centers, 12 in Canada and 13 in the United States, entered a total of 1,072 patients during a 3-year recruitment period; these patients were randomly allocated to receive either 250 mg ticlopidine or identical-appearing placebo tablets twice daily for up to 3 years. Patient recruitment was completed in December 1986. Patients were followed for a maximum of 3 years or until the close of the study in December 1987; at that time an average follow-up of 25 months had been achieved. We summarize the protocol and organization of the study and document the methods of execution and analysis, with corresponding criteria, before disclosure of the treatment code to any of the study investigators. We also provide a clinical description of the patients at entry into the study.

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