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Background <p>Obesity 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.</p> Methods <p>This 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).</p> Results <p>The 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 (<i>r</i> = 0.603; <i>p</i> &lt; 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.</p> Conclusions <p>The 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.</p>

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Reliability and Validity of the Duke Activity Status Index in Bariatric Surgery Individuals Living with Obesity: Insights into Prognostic Value

  • 期刊论文

  • 发表日期：

    2025年1月31日

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  • Hamdiye Turan,
  • Zeynal Yasacı,
  • Hasan Elkan

摘要

Background

Obesity 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.

Methods

This 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).

Results

The 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.

Conclusions

The 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.