A new causal chain model positing theory- and research-based interrelationships among psychosocial and behavioral variables leading to weight loss and its maintenance was assessed. Two samples of women participating in community-based cognitive-behavioral obesity treatments were assessed over either 6 months (weight loss phase; N = 103), or additionally including Months 6–12 (weight-loss maintenance phase; N = 101). Analyses first evaluated whether baseline physical, demographic, behavioral (physical activity, fruit/vegetable intake), and/or psychosocial (self-regulation, self-efficacy, negative mood) variables significantly predicted weight change. Further analyses assessed whether changes in model-based behavioral and psychosocial variables significantly differed by groupings of participants based on their short-term weight loss and weight-loss maintenance/further loss. The predictive value of changes in the psychosocial variables on behavioral changes was next assessed, also accounting for group. Finally, mediation, moderation, and moderated mediation analyses tested proposed causal chain-based interrelationships among variables. Of the 12 variables assessed at baseline, only weight was inversely associated with lost weight, and only fruit/vegetable intake was positively associated with effects during the weight-loss maintenance phase. Overall improvements in behavioral and psychosocial variables were significantly greater in participant groupings with better weight loss and weight-loss maintenance results. Changes in self-regulation, self-efficacy, and mood significantly predicted the weight-loss behavior changes, unaffected by group. Results from the five mediation, moderation, and moderated mediation analyses supported hypotheses based on the new causal chain model. The field testing indicated adequacy of the new causal chain model and informed architectures of behavioral obesity treatments concerned with long-term reductions in excess weight.

中文翻译：

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评估一种新的因果链模型，用于在寻求持续减肥的社区肥胖治疗中预测嵌入的心理社会和行为关系

评估了一种新的因果链模型，该模型在导致体重减轻及其维持的心理社会和行为变量之间建立了基于理论和研究的相互关系。在 6 个月（减肥阶段；N  = 103）或另外包括第 6-12 个月（减肥维持阶段；N = 101）。分析首先评估基线身体、人口统计、行为（体力活动、水果/蔬菜摄入量）和/或社会心理（自我调节、自我效能、消极情绪）变量是否显着预测体重变化。进一步的分析评估了基于模型的行为和社会心理变量的变化是否因参与者的短期减肥和减肥维持/进一步减肥而异。接下来评估心理社会变量变化对行为变化的预测价值，也考虑到群体。最后，中介、适度和适度中介分析测试了提议的基于因果链的变量之间的相互关系。在基线评估的 12 个变量中，只有体重与体重减轻呈负相关，并且只有水果/蔬菜摄入量与减肥维持阶段的效果呈正相关。在具有更好的减肥和减肥维持结果的参与者分组中，行为和心理社会变量的总体改善显着更大。自我调节、自我效能和情绪的变化显着预测了减肥行为的变化，不受组的影响。五种中介、适度和适度中介分析的结果支持基于新因果链模型的假设。现场测试表明新的因果链模型和与长期减少超重有关的行为肥胖治疗的知情架构是充分的。在具有更好的减肥和减肥维持结果的参与者分组中，行为和社会心理变量的总体改善显着更大。自我调节、自我效能和情绪的变化显着预测了减肥行为的变化，不受组的影响。五种中介、适度和适度中介分析的结果支持基于新因果链模型的假设。现场测试表明新的因果链模型和与长期减少超重有关的行为肥胖治疗的知情架构是充分的。在具有更好的减肥和减肥维持结果的参与者分组中，行为和心理社会变量的总体改善显着更大。自我调节、自我效能和情绪的变化显着预测了减肥行为的变化，不受组的影响。五种中介、适度和适度中介分析的结果支持基于新因果链模型的假设。现场测试表明新的因果链模型和与长期减少超重有关的行为肥胖治疗的知情架构是充分的。和情绪显着预测了减肥行为的变化，不受组的影响。五种中介、适度和适度中介分析的结果支持基于新因果链模型的假设。现场测试表明新的因果链模型和与长期减少超重有关的行为肥胖治疗的知情架构是充分的。和情绪显着预测了减肥行为的变化，不受组的影响。五种中介、适度和适度中介分析的结果支持基于新因果链模型的假设。现场测试表明新的因果链模型和与长期减少超重有关的行为肥胖治疗的知情架构是充分的。