Postoperative Stroke Risk Model (Noncardiac Surgery) Calculator

Postoperative Stroke Risk Model: Explanation and Clinical Context This calculator estimates 30-day postoperative ischemic stroke risk after noncardiac, nonneurologic surgery using preoperative variables. Predictors are derived from NSQIP-based studies and include age, prior stroke/TIA, coronary disease, recent myocardial infarction, renal dysfunction, anemia, dysnatremia, COPD, hypertension, smoking, ASA class, emergency status, and surgical category. Stroke incidence after noncardiac surgery is typically 0.1–1%, but risk concentrates among older patients, those with cerebrovascular or renal disease, and in high-risk surgeries such as vascular or thoracic.

This model uses an evidence-informed scoring system reflecting those predictors, mapped to an estimated absolute risk via a logistic function.