Momentary assessment of adults' physical activity and sedentary behavior: feasibility and validity
Momentary assessment of adults' physical activity and sedentary behavior: feasibility and validity
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DOI：
10.3389/fpsyg.2012.00260
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发表时间：
2012-01-01
影响因子：
3.8
通讯作者：
Intille, Stephen
中科院分区：
文献类型：
--
作者：
Dunton, Genevieve Fridlund;Liao, Yue;Intille, Stephen
手机无处不在，易于使用，因此有能力从大量的人那里收集实时数据。研究测试了生态瞬间评估（EMA）自我报告协议的可行性和有效性，该协议使用手机上的电子调查来评估成年人的身体活动和久坐行为。方法：成人（N = 110, 73%为女性，30%为西班牙裔，62%为超重/肥胖）完成了为期4天（周六、周二）的随信号而定的EMA方案，每天随机间隔8次调查。评估当前活动的EMA项目（例如，看电视/电影、阅读/电脑、体育活动/锻炼）。在每次EMA提示之前和之后，EMA反应与加速度计测量的中高强度身体活动（MVPA）和久坐活动（SA）的分钟数时间匹配。结果：对于体重不足/正常的参与者，未回答的EMA提示的MVPA（+/- 15分钟）大于回答的EMA提示（p = 0.029），表明活动水平可能影响响应的可能性。下半场。ema报告的体力活动前后间隔（n = 296次）在MVPA上没有差异（p > 0.05），这表明提示不会干扰体力活动。在ema报告的久坐行为（n = 904次，p < 0.05）后，超重和肥胖参与者的SA下降。与其他活动相比，EMA报告的体力活动和久坐行为在EMA提示的+/- 15分钟内分别具有显著更高的MVPA和SA (ps < 0.001)，为标准的有效性提供了证据。结论：研究结果总体上支持使用手机测量成人身体活动和久坐行为的4天信号随机EMA方案的可接受性和有效性。然而，在体重过轻和体重正常的个体中，可能会遗漏一些MVPA。
Introduction: Mobile phones are ubiquitous and easy to use, and thus have the capacity to collect real-time data from large numbers of people. Research tested the feasibility and validity of an Ecological Momentary Assessment (EMA) self-report protocol using electronic surveys on mobile phones to assess adults' physical activity and sedentary behaviors. Methods: Adults (N = 110; 73% female, 30% Hispanic, 62% overweight/obese) completed a 4-day signal-contingent EMA protocol (Saturday Tuesday) with eight surveys randomly spaced throughout each day. EMA items assessed current activity (e.g., Watching TV/Movies, Reading/Computer, Physical Activity/Exercise). EMA responses were time-matched to minutes of moderate-to-vigorous physical activity (MVPA) and sedentary activity (SA) measured by accelerometer immediately before and after each EMA prompt. Results: Unanswered EMA prompts had greater MVPA (+/- 15 min) than answered EMA prompts (p = 0.029) for under/normal weight participants, indicating that activity level might influence the likelihood of responding. The 15-min. intervals before versus after the EMA-reported physical activity (n = 296 occasions) did not differ in MVPA (p > 0.05), suggesting that prompting did not disrupt physical activity. SA decreased after EMA-reported sedentary behavior (n = 904 occasions; p < 0.05) for overweight and obese participants. As compared with other activities, EMA-reported physical activity and sedentary behavior had significantly greater MVPA and SA, respectively, in the +/- 15 min of the EMA prompt (ps < 0.001), providing evidence for criterion validity. Conclusion: Findings generally support the acceptability and validity of a 4-day signal-contingent EMA protocol using mobile phones to measure physical activity and sedentary behavior in adults. However, some MVPA may be missed among underweight and normal weight individuals.