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Summary
Stroke incidence declined in Finland, with significant drops in cerebral hemorrhage for men and subarachnoid hemorrhage for women. Case fatality for cerebral hemorrhage also decreased, though overall stroke mortality trends were unclear.
Area of Science:
- Neurology
- Epidemiology
- Public Health
Background:
- Stroke remains a significant cause of mortality and morbidity globally.
- Understanding temporal trends and risk factors for stroke is crucial for public health interventions.
Purpose of the Study:
- To compare stroke incidence and mortality in Espoo-Kauniainen, Finland, between two periods (1972-73 and 1978-80).
- To analyze acute-stage factors influencing stroke case fatality.
Main Methods:
- Retrospective comparison of stroke data from two distinct time periods in the same geographical area.
- Analysis of demographic and clinical factors associated with stroke case fatality.
Main Results:
- A non-significant declining trend in age-adjusted stroke incidence was observed.
- Statistically significant decreases in the incidence of cerebral hemorrhage (men) and subarachnoid hemorrhage (women) were noted.
- No decrease in cerebral infarction incidence was found.
- While overall mortality showed no clear trend, 3-month mortality from cerebral hemorrhage decreased from 72% to 59%.
- Factors increasing case fatality included reduced consciousness, cerebral hemorrhage, and older age.
Conclusions:
- Improved hypertension management may contribute to the decline in cerebral hemorrhage incidence.
- The reasons for the decrease in subarachnoid hemorrhage incidence require further investigation.
- While some stroke subtypes show declining incidence and improved outcomes, overall stroke mortality trends require continued monitoring and research.