Published Online
on February 1, 2007

A more recent version of this article appeared on March 1, 2007

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Submitted on July 11, 2006
Revised on October 3, 2006
Accepted on October 18, 2006

A Prospective Community-Based Study of Stroke in Kolkata, India

Shyamal K. Das DM^*; Tapas K. Banerjee FRCP; Atanu Biswas DM; Trishit Roy DM; Deepak K. Raut MD; Chandra S. Mukherjee MRCPsych; Arijit Chaudhuri PhD; Avijit Hazra MD; and Jayanta Roy DM

From Bangur Institute of Neurology (S.K.D., A.B., T.R., J.R.), Kolkata, India; National Neurosciences Centre (T.K.B., C.S.M.), Kolkata, India; All India Institute of Hygiene and Public Health (D.K.R.), Kolkata, India; Indian Statistical Institute (A.C.), Kolkata, India; and Institute of Post Graduate Medical Education and Research (A.H.), Kolkata, India.

^* To whom correspondence should be addressed. E-mail: das_sk70{at}hotmail.com.

Background and Purpose--Information on essential stroke parameters are lacking in India. This population-based study on stroke disorder was undertaken in the city of Kolkata, India, to determine the subtypes, prevalence, incidence, and case fatality rates of stroke.

Methods--This was a longitudinal descriptive study comprising 2-stage door-to-door survey of a stratified randomly selected sample of the city population, conducted twice per year for 2 successive years from March 2003 to February 2005.

Results--Out of the screened population of 52 377 (27 626 men, 24 751 women), the age standardized prevalence rate of stroke to world standard population is 545.10 (95% CI, 479.86 to 617.05) per 100 000 persons. The age standardized average annual incidence rate to world standard population of first-ever-in-a-lifetime stroke is 145.30 (95% CI, 120.39 to 174.74) per 100 000 persons per year. Thirty-day case fatality rate is 41.08% (95% CI, 30.66 to 53.80). Women have higher incidence and case fatality rates. Despite divergence on socioeconomic status between the slum and nonslum dwellers, stroke parameters were not significantly different.

Conclusion--The age standardized prevalence and incidence rates of stroke in this study are similar to or higher than many Western nations. The overall case fatality rate is among the highest category of stroke fatality in the world. The women have higher incidence and case fatality rates compared with men.

Key words: case fatality • epidemiology • incidence • prevalence • stroke

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