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Abstract
Objective: To examine whether baseline high blood pressure and antihypertensive treatment predicts cognitive decline in elderly individuals.
Methods: A longitudinal population-based study of elderly individuals (n = 1,373) in Nantes (western France) was undertaken. Individuals 59 to 71 years of age were selected from electoral rolls. High blood pressure at baseline was defined as systolic blood pressure ≥ 160 mm Hg or diastolic blood pressure ≥ 95 mm Hg. Cognitive decline was defined as a drop of 4 points or more on the Mini-Mental State Examination between baseline and the 4-year assessment.
Results: There is an association between high blood pressure at baseline and cognitive decline at the 4-year assessment (odds ratio, 2.8; 95% CI, 1.6 to 5.0). In participants with high blood pressure, the risk of cognitive decline was 4.3 (95% CI, 2.1 to 8.8) in those without antihypertensive therapy and 1.9 (95% CI, 0.8 to 4.4) in those being treated. In participants with high blood pressure both at baseline and at the 2-year assessment, the risk for untreated participants was 6.0 (95% CI, 2.4 to 15.0) compared with 1.3 (95% CI, 0.3 to 4.9) in treated participants.
Conclusions: High blood pressure was associated with cognitive decline. In individuals with high blood pressure, cognitive decline occurred in a relatively short time period and the risk was highest in untreated hypertensive patients.
- Received April 5, 1999.
- Accepted June 29, 1999.
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