Key result
The prevalence of isolated systolic hypertension at first visit in untreated subjects aged 70-80 years was 17.4% in women and 13.5% in men, reducing to 10.4% when averaging all visits.
Why the study?
What is the prevalence of isolated systolic hypertension and the white coat effect in an elderly population?
Cross-Sectional (n=2,806)
What is the prevalence of isolated systolic hypertension and the white coat effect in an elderly population?
Answers are grounded in this paper and cite their sources.
The prevalence of isolated systolic hypertension in the elderly is significantly overestimated by single-visit clinic measurements due to regression to the mean, highlighting the need for multiple visits for accurate diagnosis.
Isolated systolic hypertension (ISH) is a major risk factor for cardiovascular complications. Nevertheless, data on the prevalence in a representative population do not seem to be available. The prevalence of ISH and the white coat effect was thus studied in a cross-sectional survey of 2806 inhabitants aged 70-80 years. In untreated subjects, the prevalence of ISH was 17.4% (95% CI 14.9-20.2) in women and 13.5% (95% CI 11.3-15.9) in men using clinic blood pressure at first visit. The prevalence increased significantly with age. The prevalence was reduced to 10.4% when using the average of all-visits clinic blood pressures. By a simulation model, it was demonstrated that his reduction mainly resulted from a regression towards the mean. Average all-visits clinic blood pressure was 172.6 +/- 10.4/81.1 +/- 6.0 mmHg. Less than one-third of those with all-visit ISH had sustained ISH. Identifying subjects with sustained ISH requires measurements in more than three visits.
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Talleruphuus et al. (2006) conducted a cross-sectional in Isolated systolic hypertension (n=2,806). Isolated systolic hypertension was evaluated on Prevalence of isolated systolic hypertension. The prevalence of isolated systolic hypertension at first visit in untreated subjects aged 70-80 years was 17.4% in women and 13.5% in men, reducing to 10.4% when averaging all visits.
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