Key result
Winter season linked to ~4 mmHg higher SBP versus summer, especially in lower socioeconomic groups.
Why the study?
Does socioeconomic status modify the seasonal effect on blood pressure in the South African adult population?
Population
South African adult population from a national panel study
Comparison
Winter season (cold weather) vs Summer season
Design
Cohort
Authors
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May support seasonal BP monitoring in lower-SES groups; extends prior observations but remains hypothesis-generating.
Observational (n=11,440)
Does socioeconomic status modify the seasonal effect on blood pressure in the South African adult population?
Mean Difference: 4.25 (95% CI 3.18–5.31)
Blood pressure shows seasonal variation (higher in winter) that is modified by age and socioeconomic status, with larger effects observed in lower socioeconomic classes.
Cois et al. (2015) conducted an observational in Blood pressure (seasonal variation) (n=11,440). Winter season vs. Summer season was evaluated on Seasonal effect on systolic blood pressure (women) (4.25 mmHg, 95% CI 3.18-5.31). Winter season increased systolic blood pressure by 4.25 mmHg in women and 4.21 mmHg in men compared to summer, with greater seasonal effects observed in individuals with lower socioeconomic status.
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