Abstract：
OBJECTIVE: Overly rigid forms of dietary restraint are associated with poorer weight loss outcomes. Dichotomous (\"all or nothing\") thinking has been shown to mediate this relationship in non-clinical participants, but this finding has yet to be replicated in clinical samples of individuals who have had weight-loss surgery.
METHODS: A cross-sectional design was used, adopting quantitative questionnaires with 129 individuals who had previously underwent bariatric surgery at least 12 months prior to participation. Bootstrapped mediation analysis was used to establish the mediating role of dichotomous thinking.
RESULTS: Eating-specific dichotomous thinking was shown to fully mediate the relationship between dietary restraint and post-surgical weight loss. In contrast, no mediation effect was found for generalised dichotomous thinking.
CONCLUSIONS: Dichotomous thinking specifically about food/eating may play a central role in weight loss maintenance after weight-loss surgery. Pre-surgical assessment of dichotomous thinking, and provision of psychological therapy to think more flexibly about food, is suggested.
METHODS: A cross-sectional design was used, adopting quantitative questionnaires with 129 individuals who had previously underwent bariatric surgery at least 12 months prior to participation. Bootstrapped mediation analysis was used to establish the mediating role of dichotomous thinking.
RESULTS: Eating-specific dichotomous thinking was shown to fully mediate the relationship between dietary restraint and post-surgical weight loss. In contrast, no mediation effect was found for generalised dichotomous thinking.
CONCLUSIONS: Dichotomous thinking specifically about food/eating may play a central role in weight loss maintenance after weight-loss surgery. Pre-surgical assessment of dichotomous thinking, and provision of psychological therapy to think more flexibly about food, is suggested.
摘要：
目的：过度严格的饮食限制与较差的体重减轻结果相关。二分法（“全部或全部”）思维已被证明可以在非临床参与者中调解这种关系，但这一发现尚未在接受过减肥手术的患者的临床样本中得到证实.
方法：使用横截面设计，采用定量问卷,对129名之前至少12个月接受过减肥手术的个体进行调查.自举中介分析用于建立二分法思维的中介作用。
结果：饮食特异性二分法思维被证明可以完全调节饮食限制与手术后体重减轻之间的关系。相比之下,一般二分法思维未发现中介效应.
结论：关于食物/饮食的二分法思考可能在减肥手术后的减肥维持中起重要作用。二分法思维的术前评估，并提供心理治疗以更灵活地思考食物，是建议的。
方法：使用横截面设计，采用定量问卷,对129名之前至少12个月接受过减肥手术的个体进行调查.自举中介分析用于建立二分法思维的中介作用。
结果：饮食特异性二分法思维被证明可以完全调节饮食限制与手术后体重减轻之间的关系。相比之下,一般二分法思维未发现中介效应.
结论：关于食物/饮食的二分法思考可能在减肥手术后的减肥维持中起重要作用。二分法思维的术前评估，并提供心理治疗以更灵活地思考食物，是建议的。
