Reciprocal effects among changes in weight, body image, and other psychological factors during behavioral obesity treatment: a mediation analysis
Reciprocal effects among changes in weight, body image, and other psychological factors during behavioral obesity treatment: a mediation analysis
复制标题
DOI：
10.1186/1479-5868-6-9
复制
发表时间：
2009-02-09
影响因子：
8.7
通讯作者：
Teixeira, Pedro J.
中科院分区：
文献类型：
--
作者：
Palmeira, Antonio L.;Markland, David A.;Teixeira, Pedro J.
背景：身体形象和主观幸福感变量（如自尊）的改变经常被报道为肥胖治疗的结果。然而，它们也可能反过来影响行为的坚持和减肥的成功。本研究考察了肥胖治疗相关变量之间的关联，即体重、生活质量、身体形象和主观幸福感的变化，探讨了它们在行为肥胖治疗过程中作为中介和结果的作用。方法：参与者(BMI = 31.1 +/- 4.1 kg/m(2)；年龄= 38.4±6.7岁)的144名妇女参加了为期12个月的肥胖治疗计划，对照组（n = 49）接受了一般健康教育计划。干预措施包括定期举行小组会议，促进在体育活动和饮食摄入方面的持久行为改变。在基线和治疗结束时测量身体形象、生活质量、主观幸福感和体重。通过多元回归和重新抽样方法来测量间接效应来检验中介作用。治疗组分配是自变量，而体重和社会心理变量的变化作为中介变量和因变量进行了交替分析。结果：在12个月时，干预组有更大的体重减轻（-5.6 +/- 6.8% vs -1.2 +/- 4.6%, p < .001）和更大的体型不满意度下降(效应量为1.08 vs。41岁的p
Background: Changes in body image and subjective well-being variables (e.g. self-esteem) are often reported as outcomes of obesity treatment. However, they may, in turn, also influence behavioral adherence and success in weight loss. The present study examined associations among obesity treatment-related variables, i.e., change in weight, quality of life, body image, and subjective well-being, exploring their role as both mediators and outcomes, during a behavioral obesity treatment.Methods: Participants (BMI = 31.1 +/- 4.1 kg/m(2); age = 38.4 +/- 6.7 y) were 144 women who attended a 12-month obesity treatment program and a comparison group (n = 49), who received a general health education program. The intervention included regular group meetings promoting lasting behavior changes in physical activity and dietary intake. Body image, quality of life, subjective wellbeing, and body weight were measured at baseline and treatment's end. Mediation was tested by multiple regression and a resampling approach to measure indirect effects. Treatment group assignment was the independent variable while changes in weight and in psychosocial variables were analyzed alternatively as mediators and as dependent variables.Results: At 12 months, the intervention group had greater weight loss (-5.6 +/- 6.8% vs. -1.2 +/- 4.6%, p < .001) and larger decreases in body size dissatisfaction (effect size of 1.08 vs. .41, p