Incremental validity of the episode size criterion in binge-eating definitions: An examination in women with purging syndromes.
Incremental validity of the episode size criterion in binge-eating definitions: An examination in women with purging syndromes.
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DOI：
10.1002/eat.22508
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发表时间：
2016-07
期刊：
影响因子：
--
通讯作者：
Keel PK
中科院分区：
文献类型：
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作者：
Forney KJ;Bodell LP;Haedt-Matt AA;Keel PK
在暴食的两个主要特征中，饮食失控得到了很好的验证，而饮食事件大小的作用则不太清楚。鉴于ICD-11建议从暴饮暴食定义中删除发作大小，本研究检查了大小标准的增量有效性，控制了暴食。访谈和问卷调查数据来自四项研究的243名妇女与神经性贪食症（n=141）或净化障碍（n=102）。分层线性回归测试，如果最大的报告发作大小，编码千卡，解释额外的变异饮食失调的功能，精神病理学，人格特质，和损害，保持恒定的进食频率，年龄，和体重指数（BMI）。分析还测试了事件大小是否会调节进食与这些变量之间的关联。保持恒定，发作的大小解释了去抑制，特质焦虑和进食障碍相关损害的显着差异。发作大小调节了暴食与清除频率和抑郁症状的关联，因此，在较大的饮食发作的情况下，暴食与这些特征更密切相关。发作次数及其与LOC的相互作用都无法解释BMI、饥饿、克制、形状问题、状态焦虑、消极紧迫感或整体功能的额外差异。两者合计，结果支持的增量有效性的大小标准，除了和结合暴食，定义暴食发作的净化综合征。未来的研究应该检查发作大小在净化和非净化进食障碍中的预测有效性（例如，暴饮暴食症），以告知疾病分类方案。
Of the two primary features of binge eating, loss of control (LOC) eating is well validated while the role of eating episode size is less clear. Given the ICD-11 proposal to eliminate episode size from the binge-eating definition, the present study examined the incremental validity of the size criterion, controlling for LOC. Interview and questionnaire data come from four studies of 243 women with bulimia nervosa (n=141) or purging disorder (n=102). Hierarchical linear regression tested if the largest reported episode size, coded in kilocalories, explained additional variance in eating disorder features, psychopathology, personality traits, and impairment, holding constant LOC eating frequency, age, and body mass index (BMI). Analyses also tested if episode size moderated the association between LOC eating and these variables. Holding LOC constant, episode size explained significant variance in disinhibition, trait anxiety, and eating disorder-related impairment. Episode size moderated the association of LOC eating with purging frequency and depressive symptoms, such that, in the presence of larger eating episodes, LOC eating was more closely associated with these features. Neither episode size nor its interaction with LOC explained additional variance in BMI, hunger, restraint, shape concerns, state anxiety, negative urgency, or global functioning. Taken together, results support the incremental validity of the size criterion, in addition to and in combination with LOC eating, for defining binge-eating episodes in purging syndromes. Future research should examine the predictive validity of episode size in both purging and non-purging eating disorders (e.g., binge eating disorder) to inform nosological schemes.