TOAST criteria applied in acute ischemic stroke

Area of Science:

• Neurology
• Clinical Medicine
• Stroke Research

Background:

• Accurate etiological subclassification of ischemic stroke is crucial for targeted therapies.
• The TOAST classification is a key tool for stroke etiology determination.
• Assessing the reliability and validity of TOAST in the acute setting is essential.

Purpose of the Study:

• To evaluate the inter-rater reliability of the TOAST classification in acute ischemic stroke.
• To assess the criterion validity of TOAST in distinguishing small vessel disease from other stroke etiologies.
• To determine the utility of TOAST in the acute care setting.

Main Methods:

• 38 patients with acute ischemic stroke were classified using TOAST criteria by two registrars.
• Initial classifications were compared against a consensus classification derived from comprehensive investigations.
• Inter-rater reliability and criterion validity were assessed using kappa statistics, sensitivity, and specificity.

Main Results:

• Excellent inter-rater reliability was observed between the two junior registrars (kappa = 0.88).
• Fair overall agreement was found between initial and consensus TOAST classifications (kappa = 0.30).
• The TOAST classification demonstrated high sensitivity (0.93) and specificity (0.83) in differentiating small vessel disease.

Conclusions:

• While comprehensive investigation is ideal, TOAST classification is valuable in the acute setting.
• TOAST aids physicians in differentiating small vessel disease from other acute stroke etiologies.
• This classification is particularly important when considering therapies with potential adverse effects.