ArticleObesity surgery2025
Reliability and Validity of the Duke Activity Status Index in Bariatric Surgery Individuals Living with Obesity: Insights into Prognostic Value.
Article in Obesity surgery, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundObesity is a global health issue that complicates surgical outcomes, particularly in bariatric/metabolic surgery candidates. Assessing functional capacity is critical for optimizing preoperative planning and postoperative care. The Duke Activity Status Index (DASI) is a simple, self-administered questionnaire that estimates functional capacity based on daily activities. This study evaluates the reliability and clinical applicability of the DASI as an alternative to the 6-min walk test (6-MWT) for bariatric/metabolic surgery individuals living with obesity.
methodsThis cross-sectional study included 126 individuals who are candidates for bariatric/metabolic surgery. Participants completed the DASI and 6-MWT. Test-retest reliability was assessed using intraclass correlation coefficients (ICCs), and validity was evaluated through correlations with 6-MWT results. The agreement was measured using the standard error of measurement (SEM) and minimal detectable change (MDC).
resultsThe DASI demonstrated excellent internal consistency (Cronbach's alpha = 0.86) and test-retest reliability (ICC = 0.97, 95% CI: 0.96-0.98). A strong correlation was observed between DASI and 6-MWT scores (r = 0.603; p < 0.001). ROC analysis showed an optimal cut-off score of 24.1 (AUC = 0.836), with 72.2% sensitivity and 74.1% specificity. The SEM and MDC values were 2.36 and 6.54 points, respectively.
conclusionsThe DASI is a reliable, accessible tool for bariatric surgeons to assess functional capacity in candidates for bariatric/metabolic surgery. Its simplicity, strong correlation with performance-based measures, and minimal resource requirements make it ideal for preoperative evaluations, particularly in resource-limited settings.
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