Key result
South Africans had a higher age-standardised prevalence of hypertension (79.2%) compared to Ghanaians (59.1%), with determinants such as rural residence and education varying significantly between the two countries.
Why the study?
Determinants of hypertension prevalence, diagnosis, and control are poorly understood in sub-Saharan Africa, including whether they vary between and among countries.
Cross-Sectional (n=7,654)
Yes
Absolute Event Rate: 79.2% vs 59.1%
Behavioural, environmental, and social determinants influence hypertension prevalence and status differently between middle and older-age adults in Ghana and South Africa.
Country-specific hypertension prevalence differences support tailored screening in sub-Saharan Africa; leaves open causal mechanisms for prospective study.
Objectives: Determinants of hypertension prevalence, diagnosis and control are poorly understood in sub-Saharan Africa, including whether these determinants vary between and among countries.Methods: A cross-sectional analysis of Study on global AGEing and adult health (SAGE) data, nationally representative samples of adults aged 50+ (n=3 458 South Africa; n=4 196 in Ghana). Hypertension prevalence and status (awareness, treatment and control) were determined from directly measured blood pressure and respondents’ self-reported history of hypertension diagnosis and current treatment status. Sex-stratified, multivariable adjusted logistic regression models were used to test cross-country differences in demographic, socio-economic, environmental, and health-related determinants of hypertension prevalence and status.Results: South Africans had higher age-standardised prevalence of hypertension (Men: 76%, Women: 82%) compared to Ghana (Men: 57%, Women: 61%). Odds of hypertension prevalence varied for rural residence and education varied between country. Consistent differences in awareness of hypertension between countries included education, income, and weight status by sex; sex-specific differences between countries were also apparent. Determinants of control and management of hypertension (education) differed between countries only for women.Conclusions: Behavioural, environmental, and social determinants all influence hypertension prevalence and status for middle and older-age adults in sub-Saharan Africa, although differently between countries.
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Capistrant et al. (2019) conducted a cross-sectional in Hypertension (n=7,654). Country of residence and socio-demographic factors vs. Between countries (South Africa vs. Ghana) was evaluated on Age-standardised prevalence of hypertension. South Africans had a higher age-standardised prevalence of hypertension (79.2%) compared to Ghanaians (59.1%), with determinants such as rural residence and education varying significantly between the two countries.
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