The Moderated Mediating Effect of Self-Efficacy on Exercise Among Older Adults in an Online Bone Health Intervention Study: A Parallel Process Latent Growth Curve Model

作者：Zhu Shijun^*; Nahm Eun Shim; Resnick Barbara; Friedmann Erika; Brown Clayton; Park Jumin; Cheon Jooyoung; Park DoHwan

来源：Journal of Aging and Physical Activity, 2017, 25(3): 378-386.

DOI：10.1123/japa.2016-0216

• parallel process latent growth curve modeling
• moderated mediation
• self-efficacy
• exercise

This secondary data analyses of a longitudinal study assessed whether self-efficacy for exercise (SEE) mediated online intervention effects on exercise among older adults and whether age (50-64 vs. >= 65 years) moderated the mediation. Data were from an online bone health intervention study. Eight hundred sixty-six older adults (>= 50 years) were randomized to three arms: Bone Power (n = 301), Bone Power Plus (n = 302), or Control (n = 263). Parallel process latent growth curve modeling (LGCM) was used to jointly model growths in SEE and in exercise and to assess the mediating effect of SEE on the effect of intervention on exercise. SEE was a significant mediator in 50- to 64-year-old adults (0.061, 95 BCI: 0.011, 0.163) but not in the >= 65 age group (-0.004, 95% BCI: -0.047, 0.025). Promotion of SEE is critical to improve exercise among 50- to 64-year-olds.

• 出版日期2017-7
• 单位NIH