Does baseline blood pressure level affect cognitive function later in life across different age groups?
The association between blood pressure and cognitive function reverses with age, suggesting that strict blood pressure lowering may not be beneficial for cognitive health in the very old.
OBJECTIVES: To determine the prospective relationship between blood pressure (BP) and cognitive function across a wide age range. DESIGN: Prospective population-based cohort study. SETTING: The Rotterdam Study and the Leiden 85-plus Study. PARTICIPANTS: Three thousand seventy-eight men and women, initial age 55 to 84 from the Rotterdam Study and 276 men and women, initial age 85, from the Leiden 85-plus Study. MEASUREMENTS: Systolic BP (SBP) and diastolic BP (DBP) were measured at baseline, cognitive function was assessed at the end of follow-up using a dedicated neuropsychological test battery. The association between baseline BP levels and cognitive function later in life was assessed in 10-year age groups in the Rotterdam Study and in 85-year-olds of the Leiden 85-plus Study. RESULTS: In the youngest participants ( or = 75), higher SBP and DBP seemed to be related to better cognitive function at the end of follow-up. This effect appeared strongest in the highest age group (aged 85). CONCLUSION: High BP was associated with greater risk of cognitive impairment in persons younger than 75 but with better cognitive function in older persons. Age-specific guidelines for BP management are needed, because the current directive that "lower is better" may not apply to BP levels in the very old.
Euser et al. (Tue,) studied this question.
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