Refining an algorithm-powered just-in-time adaptive weight control intervention: A randomized controlled trial evaluating model performance and behavioral outcomes.
Refining an algorithm-powered just-in-time adaptive weight control intervention: A randomized controlled trial evaluating model performance and behavioral outcomes.
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DOI：
10.1177/1460458220902330
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发表时间：
2020-12
影响因子：
3
通讯作者：
Forman EM
中科院分区：
文献类型：
--
作者：
Goldstein SP;Thomas JG;Foster GD;Turner-McGrievy G;Butryn ML;Herbert JD;Martin GJ;Forman EM
体重减轻不理想的部分原因是没有遵守规定的饮食。我们开发了一款应用程序（OnTrack），它使用生态瞬时评估来测量饮食失误和相关失误触发因素，并使用机器学习提供个性化干预。最初，通过在每个生态瞬时评估调查中提出一个失效触发问题的子集，解决了用户负担和完整数据之间的紧张关系。然而，这会产生大量缺失数据，从而降低算法性能。我们检查了每个生态瞬时评估调查中更多问题对算法性能、应用程序利用率和行为结果的影响。超重/肥胖的参与者 (n = 121) 使用为期 10 周的移动减肥计划，并被随机分配到 OnTrack-short（即 8 个问题/调查）或 OnTrack-long（即 17 个问题/调查）。其他问题降低了生态瞬时评估的依从性；然而，数据完整性的提高提高了算法性能。感知效果、应用程序利用率或行为结果没有差异。利用率和感知有效性的最小差异可能导致不同条件下的相似行为结果。
Suboptimal weight losses are partially attributable to lapses from a prescribed diet. We developed an app (OnTrack) that uses ecological momentary assessment to measure dietary lapses and relevant lapse triggers and provides personalized intervention using machine learning. Initially, tension between user burden and complete data was resolved by presenting a subset of lapse trigger questions per ecological momentary assessment survey. However, this produced substantial missing data, which could reduce algorithm performance. We examined the effect of more questions per ecological momentary assessment survey on algorithm performance, app utilization, and behavioral outcomes. Participants with overweight/obesity (n = 121) used a 10-week mobile weight loss program and were randomized to OnTrack-short (i.e. 8 questions/survey) or OnTrack-long (i.e. 17 questions/survey). Additional questions reduced ecological momentary assessment adherence; however, increased data completeness improved algorithm performance. There were no differences in perceived effectiveness, app utilization, or behavioral outcomes. Minimal differences in utilization and perceived effectiveness likely contributed to similar behavioral outcomes across various conditions.
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