The Saskatchewan Clinical Stroke Prevention Project aims to examine the process and impact of incorporating enhanced stroke prevention into the routine clinical practice of family physicians. Twenty-four physicians in three practices in Saskatchewan are participating in a staged series of educational interventions over two years to enhance their management of smoking, transient ischemic attack/stroke, atrial fibrillation and hypertension. The components of each intervention include a seminar, printed materials, a one-to-one case discussion or "academic detailing," a self-documented chart audit and changes to the office system. Patients for whom this intervention is targeted are those 55 to 75 years of age presenting for a periodic health examination with one or more of the four main risk factors for stroke. Intervention will consist of counselling on relevant risk factors by the doctor and nurse teams, supported by appropriate patient education materials. Patient follow-up will be carried out according to clinical indications and will be done at least 3, 6, 12 and 24 months after entry into the study. Evaluation comprises measures of the process of implementing change in preventive practice as well as of the impact of such change. The former includes semi-structured interviews and focus groups with physicians, support staff and patients. The latter includes an assessment of knowledge, attitudes and charted practice before and after intervention.