College of Nursing, University of Illinois Chicago, 845 S. Damen Ave., Chicago, IL, 60612, USA.
Department of Epidemiology & Biostatistics, University of Georgia, Athens, USA.
Eat Weight Disord. 2023 Feb 27;28(1):26. doi: 10.1007/s40519-023-01556-1.
To examine the association between intensive, longitudinal ecological momentary assessment (EMA) and self-reported eating behaviors.
Secondary analysis of the EMPOWER study-a 12-month observational study that examined the microprocesses of relapse following intentional weight loss using smartphone-administered EMA-was conducted. Participants were asked to complete four types of EMA surveys using a mobile app. For this analysis, only the number of completed random EMA surveys was used. Using linear mixed-effects modeling, we analyzed whether the number of completed random EMA surveys was associated with changes in self-reported dietary restraint, dietary disinhibition, and susceptibility to hunger measured using the Three-Factor Eating Questionnaire (TFEQ).
During the 12-month study, 132 participants completed a mean of 1062 random EMA surveys (range: 673-1362). The median time it took for participants to complete random EMA surveys was 20 s and 90% of random EMA surveys were completed within 46 s. The number of completed random EMA surveys was not significantly associated with the TFEQ scores.
Intensive longitudinal EMA did not influence self-reported eating behaviors. The findings suggest that EMA can be used to frequently assess real-world eating behaviors with minimal concern about assessment reactivity. Nonetheless, care must be taken when designing EMA surveys-particularly when using self-reported outcome measures.
Level III, prospective observational study.
探讨密集型、纵向的生态瞬时评估（EMA）与自我报告的饮食行为之间的关联。
对 EMPOWER 研究进行二次分析，这是一项为期 12 个月的观察性研究，使用智能手机进行 EMA 评估，以研究故意减重后复发的微观过程。参与者被要求使用移动应用程序完成四种类型的 EMA 调查。在本分析中，仅使用完成的随机 EMA 调查数量。使用线性混合效应模型，我们分析了完成的随机 EMA 调查数量是否与使用三因素饮食问卷（TFEQ）测量的自我报告的饮食抑制、饮食放纵和饥饿易感性的变化相关。
在 12 个月的研究中，132 名参与者平均完成了 1062 次随机 EMA 调查（范围：673-1362）。参与者完成随机 EMA 调查的中位数时间为 20 秒，90%的随机 EMA 调查在 46 秒内完成。完成的随机 EMA 调查数量与 TFEQ 评分无显著相关性。
密集型纵向 EMA 并未影响自我报告的饮食行为。研究结果表明，EMA 可用于频繁评估真实世界的饮食行为，而无需担心评估反应性。然而，在设计 EMA 调查时必须谨慎，尤其是在使用自我报告的结果测量时。
三级，前瞻性观察研究。
