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Objective <p>Accurate assessment of physical activity supports a&#xa0;comprehensive understanding and treatment of obesity and eating disorders. Here, we assessed the concurrent validity of a&#xa0;questionnaire and accelerometry-based measurements in a&#xa0;clinical setting.</p> Methods <p>From 2020 to 2022 a&#xa0;total of 23&#xa0;patients from a&#xa0;psychosomatic clinic participated (21&#xa0;with unspecified eating disorders, 2&#xa0;with bulimia nervosa). During the 3rd to 4th week of the clinical stay patients completed the International Physical Activity Questionnaire-Short Form and wore an accelerometer-based multisensory device (SenseWear® Armband, SWA) for 7&#xa0;days. Outcome measures included total physical activity (MET min·w<sup>−1</sup>) and sitting time (min·d<sup>−1</sup>). Concurrent validity (SWA as criterion) and proportional bias were assessed using regression analyses.</p> Results <p>The questionnaire overestimated physical activity by ~40% (+394 MET min·week<sup>−1</sup>) and underestimated sitting time by ~30% (199 min·day<sup>−1</sup>) compared to the SWA. Within-patient correlation for physical activity was good (r = 0.88, <i>p</i> &lt; 0.001) but impractical for sitting time (r = 0.41, <i>p</i> = 0.005). Greater inactivity led to greater reporting errors in sitting time (<i>p</i> = 0.005). Males underestimated sitting time more than females (<i>p</i> = 0.026). Converting objective to subjective measures resulted in typical errors of 238 MET min (total physical activity) and 88 min (sitting time).</p> Conclusion <p>Objective accelerometer-based multisensory device monitoring should be incorporated into clinical settings to treat patients with obesity and eating disorders.</p>

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Objective versus subjective physical activity assessment in a clinical setting of patients with obesity and eating disorders

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月12日

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  • Hans-Peter Wiesinger,
  • Bettina Bannert,
  • Elmar Kaiser,
  • Patrick Kutschar

摘要

Objective

Accurate assessment of physical activity supports a comprehensive understanding and treatment of obesity and eating disorders. Here, we assessed the concurrent validity of a questionnaire and accelerometry-based measurements in a clinical setting.

Methods

From 2020 to 2022 a total of 23 patients from a psychosomatic clinic participated (21 with unspecified eating disorders, 2 with bulimia nervosa). During the 3rd to 4th week of the clinical stay patients completed the International Physical Activity Questionnaire-Short Form and wore an accelerometer-based multisensory device (SenseWear® Armband, SWA) for 7 days. Outcome measures included total physical activity (MET min·w−1) and sitting time (min·d−1). Concurrent validity (SWA as criterion) and proportional bias were assessed using regression analyses.

Results

The questionnaire overestimated physical activity by ~40% (+394 MET min·week−1) and underestimated sitting time by ~30% (199 min·day−1) compared to the SWA. Within-patient correlation for physical activity was good (r = 0.88, p < 0.001) but impractical for sitting time (r = 0.41, p = 0.005). Greater inactivity led to greater reporting errors in sitting time (p = 0.005). Males underestimated sitting time more than females (p = 0.026). Converting objective to subjective measures resulted in typical errors of 238 MET min (total physical activity) and 88 min (sitting time).

Conclusion

Objective accelerometer-based multisensory device monitoring should be incorporated into clinical settings to treat patients with obesity and eating disorders.