A 5 years prospective study of incidence, morbidity and mortality profile of stroke in a rural community of eastern India.

Community-based longitudinal study on stroke is rare in India. It has been predicted that the stroke incidence will be higher in developing countries than developed countries. Hence a five years prospective study was planned to carry out in the rural Bengal, India based on WHO protocol to determine the incidence rate, risk factors, morbidity and mortality profile of stroke. In a two-stage procedure, 20717 subjects out of 20842 people from a cluster of 12 villages was surveyed by house-to-house method and the screened cases were examined by a team of neurologists including post stroke surveillance for one year. Altogether 128 first ever stroke cases were detected over 5 years showing an average annual incidence rate of 123.57 per 100,000 persons [age adjusted incidence rate (AAIR)--262/100,000; based on USA population, 1990] and sex-specific AAIR (274/100,000) among women is slightly higher than men (253/100,000). Age-specific stroke incidence rate showed increasing rate from fourth decade up to seventh decade in both sexes when the rate was maximum. First 30 days mortality recorded was 18% with men suffering twice than women. Follow-up after one year revealed speech improvement in 47%, residual spasticity in 46% and independency in activities daily living in 62% of cases. Age and sex matched case control study has shown that hypertension (OR - 2.79), heart disease (OR - 6.20) and smoking (OR - 3.92) are significant risk factors. This study had indicated a higher age adjusted incidence rate of stroke in India as compared to that of developed country and hypertension, heart disease and smoking are important risk factors.