基于网络的拉丁裔人群体力活动干预中身体活动变化的心理社会中介因素。
Psychosocial mediators of physical activity change in a web-based intervention for Latinas.
机构信息
Department of Family Medicine and Public Health, University of California, San Diego.
Department of Behavioral and Social Sciences, School of Public Health, Brown University.
出版信息
Health Psychol. 2021 Jan;40(1):21-29. doi: 10.1037/hea0001041. Epub 2020 Nov 23.
To determine whether psychosocial constructs targeted in an online physical activity intervention for Latinas mediated changes in moderate-to-vigorous physical activity (MVPA). Data were taken from a randomized trial of a web-based MVPA intervention for Latina women age 18-65 ( = 205) based on social cognitive theory and the transtheoretical model. Baseline and 6-month measures included minutes/week of MVPA (ActiGraph GT3X + accelerometers and 7-Day Physical Activity Recall Interview) and theorized mediators (self-efficacy, behavioral processes, cognitive processes, social support, enjoyment). A multiple mediation model adjusting for baseline MVPA was fit using a products of coefficients method, simultaneously testing all hypothesized mediators. MVPA increased more in the intervention group than controls by 50 min/week (self-report) and 31 min/week (accelerometers). For the self-reported MVPA model, there was an intervention effect (a-path coefficient) on self-efficacy ( = 0.43, < .01), cognitive processes ( = 0.64, < .01), behavioral processes ( = 0.54, < .01), and enjoyment ( = 9.91, = .01). Changes in self-efficacy ( = 24.54, = .03), social support from friends ( = 2.36, = .04), and enjoyment (a = 0.74, = .08) were associated with changes in MVPA (b-path coefficient). However, only changes in self-efficacy ( = 10.49, 95% CI [2.46, 24.54]) and enjoyment ( = 7.30, 95% CI [0.92, 21.78]) mediated the intervention effect on MVPA (ab-path coefficient). For the accelerometer-measured MVPA model, intervention effects were significant for self-efficacy ( = 0.48, < .01), cognitive processes ( = 0.62, < .01), and behavioral processes ( = 0.61, < .01), yet only self-efficacy was associated with changes in MVPA ( = 4.43, = .03), and mediated intervention effects on MVPA ( = 12.15, 95% CI [11.25, 16.34]). Future MVPA interventions with Latinas should target self-efficacy and enjoyment to maximize efficacy. (PsycInfo Database Record (c) 2020 APA, all rights reserved).
为了确定拉丁裔女性参与的在线身体活动干预措施中针对的心理社会结构是否可以改变中度至剧烈身体活动（MVPA）。数据取自基于社会认知理论和跨理论模型的针对 18-65 岁拉丁裔女性的基于网络的 MVPA 干预的随机试验（=205）。基线和 6 个月的测量包括每周的 MVPA 分钟数（ActiGraph GT3X + 加速度计和 7 天身体活动回忆访谈）和理论上的中介变量（自我效能，行为过程，认知过程，社会支持，享受）。使用乘积系数法拟合了一个调整基线 MVPA 的多重中介模型，同时测试了所有假设的中介变量。与对照组相比，干预组的每周 MVPA 增加了 50 分钟（自我报告）和 31 分钟（加速度计）。对于自我报告的 MVPA 模型，自我效能（=0.43，<0.01），认知过程（=0.64，<0.01），行为过程（=0.54，<0.01）和享受（=9.91，=0.01）的干预效果（a-路径系数）。自我效能（=24.54，=0.03），朋友的社会支持（=2.36，=0.04）和享受（a=0.74，=0.08）的变化与 MVPA 的变化有关（b-路径系数）。然而，只有自我效能的变化（=10.49，95％CI [2.46，24.54]）和享受的变化（=7.30，95％CI [0.92，21.78]）可以调节干预对 MVPA 的影响（ab-路径系数）。对于加速度计测量的 MVPA 模型，自我效能（=0.48，<0.01），认知过程（=0.62，<0.01）和行为过程（=0.61，<0.01）的干预效果均具有统计学意义，但只有自我效能与 MVPA 的变化有关（=4.43，=0.03），并介导了干预对 MVPA 的影响（=12.15，95％CI [11.25，16.34]）。未来针对拉丁裔女性的 MVPA 干预措施应针对自我效能和享受，以最大程度地提高效果。（PsycInfo数据库记录（c）2020 APA，保留所有权利）。
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