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Obesity Surgery

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01-03-2016 | Original Contributions

Psychometric Evaluation of Disordered Eating Measures in Bariatric Surgery Candidates

Authors: Katrina Parker, Sarah Mitchell, Paul O’Brien, Leah Brennan

Published in: Obesity Surgery | Issue 3/2016

Abstract

Introduction

Assessment of disordered eating is common in bariatric surgery candidates, yet psychometric properties of disordered eating measures in this population are largely unknown.

Methods

Measures were completed by 405 adult bariatric surgery candidates at pre-surgical consultation. Fit of the original scale structures was tested using confirmatory factor analysis (CFA) and alternative factor solutions were generated using exploratory factor analysis (EFA). Reliability (internal consistency), construct validity (convergent and divergent) and criterion validity (with the EDE as criterion) were assessed.

Materials

The measures prioritised for evaluation are the following: Eating Disorder Examination Questionnaire (EDE-Q; n = 405), Three-Factor Eating Questionnaire (TFEQ; n = 405), Questionnaire of Eating and Weight Patterns Revised (QEWP-R; n = 204), Clinical Impairment Assessment (CIA; n = 204) and the Eating Disorder Examination clinical interview (EDE; n = 131).

Results

CFA revealed adequate fit for only the CIA in its current form (CFI = 0.925, RMSEA = 0.096). EFA produced revised scales with improved reliability for the EDE, EDE-Q and TFEQ. Reliability of revised subscales was improved (original scales α = 0.43–0.82; revised scales α = 0.67–0.93). Correlational analyses of the CIA and revised versions of remaining scales with measures of psychological wellbeing and impairment revealed adequate convergent validity. All measures differentiated an EDE-classified disordered eating group from a non-disordered eating group (criterion validity). Diagnostic concordance between the EDE, EDE-Q and QEWP-R was low, and identification of disordered eating behaviours was inconsistent across measures.

Conclusions

Findings highlight the limitations of existing disordered eating questionnaires in bariatric surgery candidates. Results suggest revised assessments are required to overcome these limitations and ensure that measures informing clinical recommendations regarding patient care are reliable and valid.

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Title: Psychometric Evaluation of Disordered Eating Measures in Bariatric Surgery Candidates
Authors: Katrina Parker
Sarah Mitchell
Paul O’Brien
Leah Brennan
Publication date: 01-03-2016
Publisher: Springer US
Published in: Obesity Surgery / Issue 3/2016
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI: https://doi.org/10.1007/s11695-015-1780-x

ACC 2024 Congress

Springer Medicine

Psychometric Evaluation of Disordered Eating Measures in Bariatric Surgery Candidates

Abstract

Introduction

Methods

Materials

Results

Conclusions

ACC 2024 Congress

Springer Medicine

Abstract

Introduction

Methods

Materials

Results

Conclusions

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