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Cold: a risk factor for stroke?

E Azevedo1, J A Ribeiro, F Lopes

  • 1Department of Neurology and Neurosurgery, Hospital de S. João, Porto, Portugal.

Journal of Neurology
|March 1, 1995
PubMed
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Cold weather is linked to increased stroke incidence, particularly ischemic stroke and transient ischemic attack. This study suggests cold may be a triggering factor for cerebrovascular disease, supporting stroke as a chronorisk condition.

Area of Science:

  • Neurology
  • Environmental Medicine
  • Epidemiology

Background:

  • Stroke incidence exhibits seasonal variations.
  • Cold ambient temperatures are hypothesized as a potential risk factor for cerebrovascular events.
  • Understanding these variations can inform public health strategies.

Purpose of the Study:

  • To investigate seasonal patterns in stroke incidence.
  • To evaluate the association between ambient temperature and stroke occurrence.
  • To determine if cold weather acts as a triggering factor for cerebrovascular disease.

Main Methods:

  • Retrospective analysis of 4048 cerebrovascular disease admissions over 33 months.
  • Linear correlation analysis relating monthly stroke admissions to mean ambient temperature.

Related Experiment Videos

  • Rhythmometric analysis to identify temporal patterns in stroke incidence.

    • Main Results:

    • A significant inverse correlation was observed between average temperature and total cerebrovascular disease admissions (r = -0.72, P < 0.00005).
    • Specific stroke subtypes, including intracerebral hemorrhage, ischemic stroke, and transient ischemic attack, showed significant inverse correlations with temperature.
    • No correlation was found between temperature and subarachnoid hemorrhage. A statistically significant rhythm with an acrophase in colder months was identified.

    Conclusions:

    • Cold ambient temperature is a significant risk factor associated with increased stroke incidence.
    • Stroke exhibits characteristics of a chronorisk disease, with cold potentially acting as a triggering factor.
    • Findings support the need for further research into environmental influences on stroke occurrence.