Key result
Lower educational attainment was associated with higher systolic blood pressure, with an absolute mean difference of 4.3 mmHg in 2016, demonstrating persistent socioeconomic inequalities over time.
Why the study?
To evaluate whether socioeconomic inequalities in blood pressure changed from 1989 to 2016, alongside declining average blood pressure and increased hypertension detection and treatment.
Observational (n=147,775)
Yes
Socioeconomic inequalities in blood pressure have persisted in Britain from 1989 to 2016 despite improved detection and treatment, highlighting the need to address wider structural determinants of health.
Answers are grounded in this paper and cite their sources.
Persistent BP inequalities signal need for equity-focused screening in lower-SES adults; leaves open whether targeted interventions can narrow gaps.
Objective To evaluate whether socioeconomic inequalities in blood pressure (BP) have changed from 1989 to 2016—a period in which average BP levels declined and the detection and treatment of high BP increased. Design Repeated observational studies. Setting 3 nationally representative British birth cohort studies—born in 1946, 1958, and 1970—and 21 nationally representative cross-sectional studies (Health Survey for England 1994 to 2016, HSE). Participants 147,775 participants with BP outcomes at age 42-46 years (cohorts) or 25 years and over (HSE). Main outcome measure Absolute differences in systolic BP (SBP) by educational attainment (cohorts and HSE) and early life social class (cohorts). Results In both datasets, lower education was associated with higher SBP, with similar absolute magnitudes of inequality across the studied period. Differences in SBP by education (Slope Index of Inequality) based on HSE data were 3.0mmHg (95% CI: 1.8, 4.2) in 1994 and 4.3mmHg (2.3, 6.3) in 2016. Findings were similar for diastolic BP (DBP) and survey-defined hypertension. Cohort data suggested that disadvantage in early and adult life had cumulative independent associations with BP: cohort-pooled differences in SBP were 4.9mmHg (3.7, 6.1) in a score combining early life social class and own education, yet were 3.4mmHg (2.4, 4.4) for education alone. In both datasets, inequalities were found across the SBP distribution—below and above hypertension thresholds—yet were larger at the upper tail; in HSE, median SBP differences were 2.8mmHg (1.7, 3.9) yet 5.6mmHg (4.9, 6.4) at the 90th quantile. Conclusion Socioeconomic inequalities in BP have persisted from 1989 to 2016, despite improved detection and treatment of high BP. To achieve future reductions in BP inequalities, policies addressing the wider structural determinants of high BP levels are likely required—targeting detection and treatment alone is unlikely to be sufficient.
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Bann et al. (2019) conducted an observational in Hypertension (n=147,775). Lower educational attainment and disadvantaged early life social class vs. Higher educational attainment and advantaged social class was evaluated on Absolute difference in systolic blood pressure by educational attainment (Slope Index of Inequality) in 2016 (MD 4.3 mmHg, 95% CI 2.3, 6.3). Lower educational attainment was associated with higher systolic blood pressure, with an absolute mean difference of 4.3 mmHg in 2016, demonstrating persistent socioeconomic inequalities over time.
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