Longitudinal study of blood pressure and stroke in over 37,000 People in China

Area of Science:

• Epidemiology
• Cardiovascular Medicine
• Neurology

Background:

• Stroke remains a leading cause of disability and death worldwide.
• Hypertension is a well-established risk factor for cerebrovascular events.
• Understanding the differential impact of systolic versus diastolic blood pressure on stroke subtypes is crucial for targeted prevention strategies.

Purpose of the Study:

• To investigate the association between blood pressure levels and incident stroke risk in a large urban Chinese cohort.
• To determine whether systolic and diastolic blood pressure have differential effects on ischemic and hemorrhagic stroke incidence.

Main Methods:

• A longitudinal study involving 37,655 subjects in urban China.
• Standardized measurement of blood pressure and follow-up for 3.5 years.
• Analysis of incident stroke events, categorized into ischemic and hemorrhagic types.

Main Results:

• Both systolic and diastolic blood pressure were significantly associated with overall stroke risk and stroke subtypes.
• The association between blood pressure and stroke risk was stronger for systolic than for diastolic pressure.
• Each 10 mm Hg increase in systolic blood pressure was associated with approximately a 25% increased risk of stroke.

Conclusions:

• Systolic blood pressure is a more critical predictor of stroke risk than diastolic blood pressure in this population.
• Elevated systolic blood pressure significantly increases the risk of both ischemic and hemorrhagic strokes.
• Public health initiatives should prioritize the control of systolic hypertension for stroke prevention.