Behavioral Response to a Just-in-Time Adaptive Intervention (JITAI) to Reduce Sedentary Behavior in Obese Adults: Implications for JITAI Optimization
Behavioral Response to a Just-in-Time Adaptive Intervention (JITAI) to Reduce Sedentary Behavior in Obese Adults: Implications for JITAI Optimization
复制标题
DOI：
10.1037/hea0000304
复制
发表时间：
2015-12-01
影响因子：
4.2
通讯作者：
Bond, Dale S.
中科院分区：
文献类型：
--
作者：
Thomas, J. Graham;Bond, Dale S.
目的：即时适应性干预（JITAIs）使用移动的计算机、传感器和软件分析来自动检测行为并提供量身定制的治疗。然而，关于JITAIs如何影响行为模式或如何最好地设计JITAIs以获得最大效果，人们知之甚少。方法：本研究探讨了B-MOBILE JITAI的提示和行为反应，以减少超重/肥胖个体的久坐行为（SB）。三十人（83%的女性; 67%的白色，平均+/- SD体重指数= 36.2 kg/m（2））测试了3种条件，这些条件以随机平衡顺序呈现，涉及基于智能手机的步行休息提示：（a）30 SB min后3 min，（B）60 SB min后6 min，（c）120 SB min后12 min。在每7天的条件下，参与者平均携带智能手机6.90天，平均每天14.94小时。3分钟和6分钟的条件导致最大数量的提示、步行休息、最好地遵守提示、每天花费在步行休息上的时间最多、以及最快地遵守提示（ps < .01）。观察到每天步行休息的次数、对提示的依从性和每天步行休息的分钟数随着在一种情况下度过的天数而略有减少，但具有统计学意义（ps < .05）。结论：B-MOBILE JITAI在临床相关性最高时可有效促进久坐行为的休息。经常提示小的变化可能是塑造久坐行为的最佳策略，尽管需要更多的研究来确定如何最好地促进长期坚持。
Objective: Just-in-time adaptive interventions (JITAIs) use mobile computers, sensors, and software analytics to automatically detect behavior and deliver tailored treatment. However, little is known about how JITAIs influence patterns of behavior or how best to design JITAIs for maximum effect. Method: This study examined prompts and behavioral response to the B-MOBILE JITAI for reducing sedentary behavior (SB) in overweight/obese individuals. Thirty participants (83% women; 67% White, mean +/- SD body mass index = 36.2 kg/m(2)) tested 3 conditions presented in a randomized counterbalanced order involving smartphone-based prompts for walking breaks of (a) 3 min after 30 SB min, (b) 6 min after 60 SB min, and (c) 12 min after 120 SB min. Results: Participants carried the smartphone an average of 6.90 days during each 7-day condition, for an average of 14.94 hr per day. The 3- and 6-min conditions resulted in the greatest number of prompts, walking breaks, the best adherence to prompts, the greatest amount of daily time spent in walking breaks, and fastest adherence to prompts (ps < .01). Small but statistically significant decreases in the number of daily walking breaks, adherence to prompts, and minutes per day spent in walking breaks were observed as a function of the number of days spent in a condition (ps < .05). Conclusions: The B-MOBILE JITAI was effective in prompting breaks in sedentary behavior when it was most clinically relevant. Frequent prompts for small change may be an optimal strategy for shaping sedentary behavior, although more research is needed to determine how best to promote long-term adherence.