Stroke: incidence and risk factors

Area of Science:

• Gerontology
• Epidemiology
• Neurology

Background:

• Stroke is a leading cause of disability and mortality in the elderly population.
• Understanding ethnic and demographic variations in stroke incidence is crucial for targeted prevention strategies.
• Previous research has identified several risk factors, but their impact may differ across ethnic groups.

Purpose of the Study:

• To prospectively estimate the incidence of stroke in a population of individuals aged 65 and older residing in homes for the aged.
• To investigate the influence of ethnicity, sex, and age on stroke incidence.
• To identify key risk factors associated with stroke in different ethnic groups.

Main Methods:

• Prospective study design involving 2,502 individuals aged 65+ living in homes for the aged.
• Data collection on stroke incidence, ethnicity (European vs. Afro-Asian), sex, age, and medical history including heart disease, hypertension, and diabetes mellitus.
• Statistical analysis to compare stroke incidence rates and identify risk factors across demographic and ethnic groups.

Main Results:

• Stroke incidence was similar between individuals born in Asian/African countries and those born in European countries.
• No significant sex differential or increase in stroke incidence with advancing age was observed in either ethnic group.
• In Europeans, prior heart disease was the strongest risk factor, followed by hypertension. In Afro-Asians, heart disease and diabetes mellitus were associated with stroke risk, but blood pressure was not.
• Total serum cholesterol and relative weight were not associated with stroke in either group.

Conclusions:

• Stroke risk factors differ between European and Afro-Asian elderly populations, with heart disease being a significant factor in both, and diabetes mellitus also relevant in Afro-Asians.
• Hypertension, while a key factor in Europeans, did not show a significant association with stroke in the Afro-Asian group in this study.
• Early implementation of programs for hypertension and stroke control is recommended, considering the identified risk factors and population demographics.