Why the study?
Does prehypertension increase the risk of stroke compared to optimal blood pressure?
Population
762,393 participants from 19 prospective cohort studies
Comparison
Prehypertension vs Optimal blood pressure (<120/80 mm Hg)
Design
Meta-analysis
Authors
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Supports stroke risk stratification in prehypertension; confirms association and extends prior meta-analyses but requires RCTs before practice change.
Does prehypertension increase the risk of stroke compared to optimal blood pressure?
Prehypertension, including both low-range and high-range categories, is significantly associated with an increased risk of stroke compared to optimal blood pressure.
Cai et al. (2014) studied this question.