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Related Experiment Videos

Stroke risk after transient ischemic attack in a population-based setting.

Lynda D Lisabeth1, Jennifer K Ireland, Jan M H Risser

  • 1Stroke Program, University of Michigan Medical School, Ann Arbor, Mich 48109-0316, USA.

Stroke
|June 12, 2004
PubMed
Summary
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Early stroke risk after transient ischemic attack (TIA) is lower than previously thought in a diverse population. Most of the 90-day stroke risk occurs within the first two days following a TIA.

Area of Science:

  • Neurology
  • Epidemiology
  • Public Health

Background:

  • Stroke risk after transient ischemic attack (TIA) is not well-established in diverse, population-based settings.
  • Understanding ethnic variations in stroke risk is crucial for targeted interventions.

Purpose of the Study:

  • To determine the stroke risk in a population-based cohort following a transient ischemic attack (TIA).
  • To examine the influence of ethnicity and other factors on post-TIA stroke risk.

Main Methods:

  • Prospective surveillance of stroke and TIA cases in a bi-ethnic Texas county (Brain Attack Surveillance in Corpus Christi - BASIC Project).
  • Case validation by board-certified neurologists using source documentation.
  • Kaplan-Meier estimates and Cox proportional hazards regression to analyze stroke risk and influencing factors.

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Main Results:

  • Identified 612 TIA cases (2000-2002); 60.9% female, 48.0% Mexican American, median age 73.8 years.
  • Cumulative stroke risk at 2 days, 7 days, 30 days, 90 days, and 12 months was 1.64%, 1.97%, 3.15%, 4.03%, and 7.27%, respectively.
  • No significant influence of ethnicity, symptoms, or risk factors on stroke risk was observed.

Conclusions:

  • Population-based study indicates lower early stroke risk post-TIA than previously reported in this bi-ethnic population.
  • A significant portion of the 90-day stroke risk following TIA manifests within the initial 2 days.