A psychometric analysis and revalidation of the Yale-Brown Obsessive Compulsive Scale modified for Binge Eating in adults with binge eating disorder

Autor: Judith Kando, Daniel Serrano, Karen Yee, Susan L. McElroy
Rok vydání: 2019
Předmět:
Zdroj: Quality of Life Research
ISSN: 1573-2649
0962-9343
DOI: 10.1007/s11136-019-02277-8
Popis: Purpose The Yale-Brown Obsessive Compulsive Scale modified for Binge Eating (Y-BOCS-BE) assesses the obsessiveness of binge eating thoughts and compulsiveness of binge eating behaviors. The findings of this study extend previously published Y-BOCS-BE psychometric evaluations in adults with binge eating disorder (BED). Methods Data from three phase 3 lisdexamfetamine dimesylate studies in adults with BED (two randomized, double-blind, placebo-controlled short-term efficacy studies; one double-blind, placebo-controlled, randomized-withdrawal maintenance-of-efficacy study) were used. Psychometric evaluations included assessment of Y-BOCS-BE dimensionality, internal consistency, convergent validity, test?retest reliability, and determinations of clinically meaningful improvement using distribution- and anchor-based methods. Results Domain specification analyses determined that the Y-BOCS-BE possessed a bifactor structure composed of a general binge eating severity domain and three subdomains (obsessive/compulsive, restraint, and control). Y-BOCS-BE internal consistency was maximized at week 12 (Cronbach?s ?, 0.95) and test?retest reliability was maximized in the 8-week retest interval from week 4 to week 12 across all no-change anchors (r?=?0.74?0.90). Likewise, convergent validity of the Y-BOCS-BE across all validators was maximized at week 12 (all r???0.66). Meaningful improvement for Y-BOCS-BE total scores was estimated to require score reductions of 12 to 17 points depending on the anchor. Conclusions The Y-BOCS-BE is a valuable tool for assessing BED symptoms. Maximization of Y-BOCS-BE reliability and validity at later study time points may be related to both treatment effects and improved insight into BED by participants during the study. Electronic supplementary material The online version of this article (10.1007/s11136-019-02277-8) contains supplementary material, which is available to authorized users.
Databáze: OpenAIRE
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