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The Effect of Age on the Association Between Blood Pressure and Cognitive Function Later in Life

Authors

  • Sjoerd M. Euser PhD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Thomas Van Bemmel MD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Miranda T. Schram PhD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Jacobijn Gussekloo MD, PhD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Albert Hofman MD, PhD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Rudi G. J. Westendorp MD, PhD,

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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  • Monique M. B. Breteler MD, PhD

    1. From the *Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands; and Departments of Gerontology and Geriatrics and Public Health and Primary Care, Leiden University Medical Centre, Leiden, the Netherlands.
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Address correspondence to Monique M.B. Breteler, Department of Epidemiology, Erasmus MC University Medical Center, PO Box 2040, 3000 CA Rotterdam, the Netherlands. E-mail: m.breteler@erasmusmc.nl

Abstract

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 (<65), SBP and DBP were not associated with cognitive function 11 years later. For persons aged 65 to 74, higher baseline SBP and DBP were related to worse cognitive function 11 years later. In contrast, in older age (≥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.

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