Key result
Over 3 decades, the population attributable fraction of stroke shifted from severe (20% to 9%) and moderate (19% to 11%) hypertension to mild hypertension (17% to 23%).
Why the study?
How does the contribution of different blood pressure levels to stroke incidence change over time in a middle-aged Japanese population?
Population
Residents aged 40 to 69 years in 4 Japanese communities across 3 cohort periods: 1963-1971, 1975-1984, and…
Comparison
Blood pressure levels (exposure) vs Different blood pressure categories
Design
Cohort
Follow-up
Mean 10 years for each cohort
Authors
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Declining hypertension PAF for stroke may reflect BP improvements; leaves open causal role in observational trends.
Cohort (n=27,172)
Yes
How does the contribution of different blood pressure levels to stroke incidence change over time in a middle-aged Japanese population?
The shift of stroke burden from severe/moderate to mild hypertension over 3 decades highlights the importance of early management of mild hypertension for stroke prevention.
Imano et al. (2009) conducted a cohort in Stroke (n=27,172). Blood pressure levels vs. Lower blood pressure levels was evaluated on Incidence of stroke. Over 3 decades, the population attributable fraction of stroke shifted from severe (20% to 9%) and moderate (19% to 11%) hypertension to mild hypertension (17% to 23%).
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