(Stroke. 1996;27:1487-1491.)
© 1996 American Heart Association, Inc.
Articles |
Declining Incidence and Mortality Rates of Stroke in Finland From 1972 to 1991
Results of Three Population-Based Stroke Registers
the Department of Neurology, Central Hospital of South Karelia (H.N.); Department of Neurology, Meilahti Hospital, University of Helsinki (M. Kotila, O.W., M. Kaste); and Department of Neurology, Jorvi Hospital, Espoo (K.A.) (Finland).
Correspondence to Dr Heikki Numminen, Department of Neurology, Meilahti Hospital, University of Helsinki, 02900 Helsinki, Finland.
Background and Purpose We aimed to determine trends in stroke incidence, mortality rates, case-fatality rates, and their relation in Finland.
Methods We compared the results of three population-based stroke registers that included first-ever strokes in people aged 
15 years. Two registers were kept in Espoo-Kauniainen, the first in 1972 to 1973 (EK 72-73) and the second in 1978 to 1980 (EK 78-80). The present register of the Finnish Heart Association (FHA 89-91) was kept in four districts in Finland in 1989 to 1991.
Results The age-adjusted incidence rates were 240.9, 174.4, and 191.6, and the 1-year mortality rates were 121.9, 77.0, and 65.3 in the EK 72-73, EK 78-80, and FHA 89-91 registers, respectively. The overall decline from 1972 to 1991 was 20% in the stroke incidence rate and 46% in the stroke mortality rate. One-month case-fatality rates decreased from 34.8% to 29.4% in the EK 72-73 and EK 78-80 registers and to 23.3% in the present register.
Conclusions The decline in the stroke incidence rate during the 1970s stabilized during the late 1980s and early 1990s; however, the case-fatality rate is still decreasing. Their combined effects may explain the continuing decline in stroke mortality.
Key Words: cerebrovascular disorders • epidemiology • incidence • mortality
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