Subtyping patients with binge-eating disorder by dietary restraint and negative affect: Characteristics and treatment outcome
Abstract
Objective: This study examined patients with binge-eating disorder (BED) subtyped by dietary restraint (DR) and the negative affect (NA) dimension of depression, anxiety, hostility, and self-esteem, comparing clinical features and outcome of evidence-based psychological treatments. It was hypothesized that individuals with DR and high NA (DR-HNA) would have lower functioning and poorer immediate and long-term BED treatment outcomes compared to those with DR and low NA (DR-LNA).
Method: Cluster analysis was conducted (n = 159) as a secondary analysis of data from a randomized group cognitive-behavioral therapy and interpersonal psychotherapy trial of women and men with BED.
Results: At pretreatment, participants with DR-HNA were higher in eating disorder and general psychopathology, emotional eating, and poor social adjustment. At post-treatment, differences in binge days between cluster groups were small and statistically nonsignificant, and differences in rates of binge-eating abstinence were only marginally significant. However, by 1-year follow-up, patients with DR-HNA had a greater increase in binge days, less abstinence from binge eating, a higher risk for relapse, and were significantly less likely to be in BED remission than those with DR-LNA.
Conclusions: DR-HNA served as a predictor of poorer maintenance of BED therapeutic improvement. Future directions to better sustain outcomes among patients with DR-HNA include developing a brief measure to assess for the full…
How strong is the evidence?
Evidence Hub reads this as a randomized trial, done in people. Its evidence level is 2 of 5 (High · randomized trial). Randomized trials of a reasonable size are the strongest single-study design. Reported size: 159 participants or records.
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