The relationship between socioeconomic status (SES) and hypertension has been studied in a number of reviews. However, the impact of SES on hypertension has been reported in several studies with conflicting results.
A systematic search was performed in PubMed, Proquest and Cochrane databases for observational studies on hypertension prevalence and SES, published in English, until March 2014. Hypertension was defined as a mean SBP of at least 140 mmHg or a DBP of at least 90 mmHg, or use of antihypertensive medication. The inverse variance method with a random-effects model was used to pool the risk estimates from the individual studies. Data abstraction was conducted independently by two authors.
Among the 2404 references, 51 studies fulfilled the inclusion criteria. An overall increased risk of hypertension among the lowest SES was found for all three indicators: income [pooled odds ratio (OR) 1.19, 95% confidence interval (CI) 0.96–1.48], occupation (pooled OR 1.31, 95% CI 1.04–1.64) and education (pooled OR 2.02, 95% CI 1.55–2.63). The associations were significant in high-income countries, and the increased risk of hypertension for the lowest categories of all SES indicators was most evident for women, whereas men revealed less consistent associations.
Low SES is associated with higher blood pressure, and this association is particularly evident in the level of education. It is important to identify and monitor hypertension to reduce the risk of this disease among the most vulnerable groups in different countries and among different societies.
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Epidemiology, Public Health and Management Department, Chongqing Medical University, Chongqing, China
*Bing Leng and Yana Jin contributed equally to the writing of this article.
Correspondence to Ge Li, Department of Epidemiology, Faculty of Public Health and Management, Chongqing Medical University, Medical College Road, No.1, Yuzhou District, Chongqing 400016, China. Tel: +86 13320336085; e-mail: firstname.lastname@example.org
Abbreviations: OR, odds ratio; PRISMA, preferred reporting items for systematic reviews and meta-analyses; RR, risk ratio; SES, socioeconomic status
Received 12 June, 2014
Revised 24 September, 2014
Accepted 24 September, 2014
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