Department of Health and Exercise Science, Wake Forest University, P.O. Box 7868, Winston-Salem, NC 27109, USA.
J Gerontol B Psychol Sci Soc Sci. 2011 May;66(3):279-86. doi: 10.1093/geronb/gbq104. Epub 2011 Feb 3.
Using the weight efficacy lifestyle questionnaire (WEL), we examined whether a group-mediated intervention for weight loss among older, obese adults resulted in changes in self-regulatory self-efficacy for eating behavior and whether these changes mediated weight loss.
This was a randomized controlled design, and 288 older adults received 1 of 3 treatments for 6 months: physical activity only (PA), weight loss + physical activity (WL + PA), or a successful aging (SA) health education program. The WEL was administered prior to randomization and again at the 6-month follow-up visit.
A significant treatment effect was observed for the WEL, F (2249) = 15.11, p < .0001, partial eta2 = .11, showing that improvement occurred only in the WL + PA group as compared with PA and SA. Changes in WEL scores partially mediated the effects of the WL + PA intervention on weight loss.
These results illustrate that WL + PA can be effective in improving older adults' self-efficacy for the self-regulation of eating behavior and that these changes are prospectively related to the amount of weight loss. Further research is warranted on an expanded concept of self-efficacy as well as controlled experimental studies on eating behavior in older adults.
使用体重功效生活问卷（WEL），我们检验了针对老年肥胖成年人的减肥群体介导干预是否导致了对饮食行为的自我调节自我效能的变化，以及这些变化是否介导了体重减轻。
这是一项随机对照设计，288 名老年人接受了以下 3 种治疗方案中的 1 种，为期 6 个月：仅进行体力活动（PA）、减肥+体力活动（WL + PA）或成功老龄化（SA）健康教育计划。WEL 在随机分组前和 6 个月随访时进行评估。
WEL 存在显著的治疗效果，F（2249）= 15.11，p <.0001，部分η2 =.11，表明仅在 WL + PA 组与 PA 和 SA 组相比，自我效能有所提高。WEL 评分的变化部分介导了 WL + PA 干预对体重减轻的影响。
这些结果表明，WL + PA 可以有效提高老年成年人对饮食行为自我调节的自我效能，并且这些变化与体重减轻的程度有前瞻性的关系。需要进一步研究更广泛的自我效能概念，以及对老年成年人饮食行为的对照实验研究。
