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The Skaraborg hypertension project. I. The prevalence of hypertension.

The prevalence of hypertension in the age group 40-69 in the County of Skaraborg, Sweden (265000 inhabitants) was estimated using diagnostic criteria commonly accepted in Sweden in recent years. The prevalence was higher than expected (16%) and most of the patients (80%) were previously identified and undergoing treatment. The quantitative aspect of hypertension was even more impressive in the ages above 69 years. Eighteen per cent of the men and 33% of the women aged 75 years were on antihypertensive medication. An unexpectedly large proportion of the population had a borderline pressure requiring further follow-up (16%). It is concluded that quantitative aspects must be taken into consideration when planning hypertension care and deciding diagnostic criteria.