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Stroke incidence in Ilan, Taiwan

S F Chang1, C L Su, Z Y Chen

  • 1Department of Neurology, Lotung Poh-Ai Hospital, Ilan Hsien, Taiwan, R.O.C.

Journal of the Formosan Medical Association = Taiwan Yi Zhi
|January 1, 1995
PubMed
Summary

This study assessed stroke incidence in South Ilan, finding higher rates of cerebral infarct and hemorrhage in certain age groups compared to Western populations. Cerebral hemorrhage incidence was notably higher than in Caucasians.

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Area of Science:

  • Neurology
  • Epidemiology
  • Public Health

Background:

  • Stroke incidence varies globally, influenced by demographics and healthcare access.
  • Understanding regional stroke patterns is crucial for targeted public health interventions.
  • Previous studies have highlighted ethnic and geographic variations in stroke types and rates.

Purpose of the Study:

  • To determine the incidence rates of cerebral infarct, cerebral hemorrhage, and subarachnoid hemorrhage in South Ilan.
  • To analyze age-specific incidence rates for first-ever stroke events.
  • To compare regional stroke incidence with international data.

Main Methods:

  • A prospective stroke registry was established in two regional hospitals serving approximately 184,000 inhabitants.

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  • Data collection occurred from January to December 1991, registering 258 stroke events.
  • Computed tomography (CT) scans were utilized in 99% of cases for diagnosis.

    • Main Results:

    • The mean age for first-ever stroke was 66.1 years.
    • Age-specific incidence rates for cerebral infarct increased with age, peaking at 8.01 per 1,000 for those ≥75 years.
    • Age-specific incidence rates for cerebral hemorrhage were higher in the ≥75 age group (2.91 per 1,000) and significantly higher than in Caucasians.
    • Subarachnoid hemorrhage incidence rates also varied by age, with the highest observed in the ≥75 group (1.21 per 1,000).
    • The 45-54 age group showed a higher incidence of first-ever stroke than in Western countries.
    • Cerebral hemorrhage incidence was similar to rates reported in Japan (1974-1983).

    Conclusions:

    • The study provides crucial epidemiological data on stroke incidence in South Ilan.
    • Cerebral infarct and hemorrhage incidence rates increase significantly with age.
    • The higher incidence of stroke, particularly cerebral hemorrhage, in this population warrants further investigation and targeted prevention strategies.