The Saskatchewan Heart Foundation Blood Pressure Survey: The efficacy of community-based detection and referral programs.
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Between 1975 and 1988, demographic data, weight and height measurements, and blood pressure readings were obtained for 77 890 residents of Saskatchewan (about 7.6% of the population). High readings were present in 7.8% of those surveyed, but prevalence fell over the lifetime of the survey. Subjects whose drug therapy was modified had a larger fall in blood pressure than those whose medical regimen was unchanged.