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Updated: Aug 3, 2026
09:59
A Magnetic Resonance Imaging Protocol for Stroke Onset Time Estimation in Permanent Cerebral Ischemia
Published on: September 16, 2017
[Interobserver variation in the diagnosis of stroke]
J Díaz Guzmán1, F Bermejo Pareja, C Fernández
1Servicio de Neurología, Hospital Universitario 12 de Octubre, Madrid.
Neurologia (Barcelona, Spain)
|June 23, 1999
Summary
Neurologists showed acceptable agreement in diagnosing stroke based on clinical descriptions. Excluding stroke improved diagnostic agreement, suggesting training can further enhance accuracy in cerebrovascular illness diagnosis.
Area of Science:
- Neurology
- Epidemiology
- Clinical Diagnostics
Context:
- Diagnostic variability in cerebrovascular illness poses challenges in clinical and epidemiological settings.
- Limited literature exists on interobserver variability in stroke diagnosis.
- This study addresses the need for understanding diagnostic consistency in stroke cases.
Purpose:
- To assess interobserver variability in diagnosing stroke, transient ischemic attack, and related conditions.
- To evaluate diagnostic agreement among neurologists with varying experience levels.
- To quantify agreement using Fleiss' kappa statistic for different diagnostic categories.
Summary:
- Ten neurologists evaluated 99 clinical cases, categorizing them as stroke, transient ischemic attack, probable, or not related.
- Fleiss' kappa analysis revealed acceptable to good agreement for stroke diagnosis (kappa=0.57).
- Diagnostic agreement was highest when excluding stroke (kappa=0.64) and varied among staff and residents.
Impact:
- Findings indicate a reasonable level of consensus in stroke diagnosis from clinical descriptions.
- Interobserver agreement can be improved, particularly through focused training.
- Results provide a basis for refining diagnostic criteria and improving consistency in cerebrovascular disease management.
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