The Saskatchewan Heart Foundation Blood Pressure Survey: The efficacy of community-based detection and referral programs. Academic Article

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.

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