This study aimed at synthesizing population-based studies on prevalence of hypertension in Nigeria from 1990 to 2009. General databases and subject-specific databases were searched for primary studies. Manuscripts of appropriate studies were retrieved. Based on some criteria, only eligible studies were included in the study. A total of 9 studies all from South-West region of Nigeria that fulfilled the inclusion criteria were retrieved. Prevalence of hypertension ranged from a minimum of 12.4% to a maximum of 34.8%. Combined prevalence rate of hypertension was 22% and with 95% confidence interval of 17 to 27%. There was also gender difference with respect to prevalence of hypertension as males had higher prevalence of hypertension compared to females. This study showed that prevalence of hypertension is high in Nigeria. There is a need to develop strategies to prevent, treat, and control hypertension effectively in Nigeria.
Key words: Hypertension, prevalence, epidemiology, meta analysis.
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