Diagnostic accuracy of the World Health Organization Disability Assessment Schedule (WHODAS 2.0) to estimate disability after stroke.

Abstract

To analyze WHODAS 2.0's diagnostic capacity and accuracy in stroke survivors. Cross-sectional methodological study, in which individuals with chronic stroke were evaluated. Disability was considered the outcome variable, being evaluated by WHODAS 2.0; the modified Rankin scale (mRS) was used as the parameter variable. Disability was categorized in two levels being: "No or mild disability" (mRS 0-2) and "Moderate to severe disability" (mRS 3-5). To identify the cutoff point, a Receiver-Operating Characteristic (ROC) curve was constructed with a confidence interval (CI) of 95% and considering sensitivity and specificity. The cutoff point >39.62 proved acceptable for distinguishing individuals with moderate/severe disability from individuals with no or mild disability (≤39.62 points), with 66.22% sensitivity, 72.41% specificity, positive predictive value (PPV) of 45.45%, and negative predictive value (NPV) of 84.74%. The area under the curve (AUC) was 0.747 (CI 95%: 0.65-0.83; <i>p</i> < 0.001). WHODAS 2.0 demonstrated acceptable diagnostic capacity and the cutoff point of 39.62 proved suitable for distinguishing individuals with moderate/severe disability from those with no or mild disability after stroke.Implications for rehabilitationWHODAS 2.0 demonstrated acceptable diagnostic capacity.The WHODAS 2.0 cut-off point of >39.62 allows stratification of post-stroke disability into two different levels (no/mild disability versus moderate/severe disability).These results facilitate clinical decision-making by rehabilitation professionals.