Divergence with age in blood pressure in African-Caribbean and white populations in England: Implications for screening for hypertension

C Agyemang, RW Humphry, R Bhopal

    Research output: Contribution to journalArticlepeer-review

    Abstract

    Background We assessed when blood pressure (BP) and hypertension begin to rise in African-Caribbeans compared to the white population; and whether the change relates to body mass index (BMI). Methods Secondary analysis of the cross-sectional Health Surveys for England among 22,723 participants (21,344 whites and 1,379 African- Caribbeans) adults aged ≥18 years. Results The cubic spline graphs showed a crossover (African-Caribbean greater than whites) at 30–40 years in BP. Age-specific mean BP and hypertension prevalence data showed at 20–29 years African- Caribbean men were advantaged but not thereafter. There was little difference in BMI in men. African-Caribbean women had lower systolic BP (but higher prevalence of hypertension) at 20–29 years but higher BP and prevalence of hypertension thereafter. African-Caribbean women had higher BMI than white women. Regression showed an age and ethnicity interaction for systolic (0.076 mm Hg greater increase per year, P = 0.054) and diastolic BP (0.068 mm Hg greater increase per year (P = 0.009) and hypertension (OR equals 1.02, P = 0.004) in African-Caribbean men, and diastolic BP in African-Caribbean women (0.057 mm Hg greater increase per year, P = 0.017). Crossover was 28, 44, and 28 years for systolic BP, diastolic BP and hypertension in men, respectively; and 40 years for diastolic BP in women. Conclusions Clinicians should be extra vigilant about screening African-Caribbean patients from the age of 30 years. Detailed study is needed to understand the still mysterious mechanisms for this crossover.
    Original languageEnglish
    Pages (from-to)89 - 96
    Number of pages8
    JournalAmerican Journal of Hypertension
    Volume25
    Issue number1
    Publication statusFirst published - 2011

    Keywords

    • African-Caribbean
    • Age
    • Blood pressure
    • Hypertension

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