Elke D ter Huurne1, Hein A de Haan2, Marieke C ten Napel-Schutz3, Marloes G Postel4, Juliane Menting5, Job van der Palen6, Maartje S Vroling7, Cor A J DeJong8. 1. Tactus Addiction Treatment, Enschede, the Netherlands; Nijmegen Institute for Scientist-Practitioners in Addiction, Nijmegen, the Netherlands. Electronic address: e.terhuurne@tactus.nl. 2. Tactus Addiction Treatment, Enschede, the Netherlands; Nijmegen Institute for Scientist-Practitioners in Addiction, Nijmegen, the Netherlands. 3. Amarum, GGNet, Zutphen, the Netherlands. 4. Tactus Addiction Treatment, Enschede, the Netherlands; Department of Psychology Health & Technology, University of Twente, Enschede, the Netherlands. 5. Expert Center for Chronic Fatigue, Radboud University Medical Center, Nijmegen, the Netherlands. 6. Medical School Twente, Medisch Spectrum Twente, Enschede, the Netherlands; Department of Research Methodology, Measurement and Data Analysis, University of Twente, Enschede, the Netherlands. 7. Amarum, GGNet, Zutphen, the Netherlands; Clinical Psychology Department, Radboud University Nijmegen, Nijmegen, the Netherlands. 8. Nijmegen Institute for Scientist-Practitioners in Addiction, Nijmegen, the Netherlands; Behavioral Science Institute, Radboud University Nijmegen, Nijmegen, the Netherlands.
Abstract
BACKGROUND: The Eating Disorder Questionnaire-Online (EDQ-O) is an online self-report questionnaire, which was developed specifically to provide a DSM-IV-TR classification of anorexia nervosa (AN), bulimia nervosa (BN), binge-eating disorder (BED), and eating disorder not otherwise specified (EDNOS), without using a face-to-face clinical interview. OBJECTIVE: The purpose of the present study was to examine the psychometric quality of the EDQ-O. METHODS: The validity of the EDQ-O was determined by examining the agreement with the diagnoses obtained from the Longitudinal, Expert, and All DATA (LEAD) standard. Participants included 134 new patients of a specialist center for eating disorders located in the Netherlands. RESULTS: Assessment of the validity of the EDQ-O yielded acceptable to good AUC (area under the receiver operating characteristic curve) values with a range from 0.72 to 0.83. Most other diagnostic efficiency statistics were also good except for a low sensitivity for AN (0.44), a low positive predictive value for BN (0.50), and a relatively low sensitivity for BED (0.66). CONCLUSION: The results of the present study suggest that the EDQ-O performs acceptably as a diagnostic instrument for all DSM-IV-TR eating disorder classifications. However, suggestions are made to further improve the validity of the EDQ-O.
BACKGROUND: The Eating Disorder Questionnaire-Online (EDQ-O) is an online self-report questionnaire, which was developed specifically to provide a DSM-IV-TR classification of anorexia nervosa (AN), bulimia nervosa (BN), binge-eating disorder (BED), and eating disorder not otherwise specified (EDNOS), without using a face-to-face clinical interview. OBJECTIVE: The purpose of the present study was to examine the psychometric quality of the EDQ-O. METHODS: The validity of the EDQ-O was determined by examining the agreement with the diagnoses obtained from the Longitudinal, Expert, and All DATA (LEAD) standard. Participants included 134 new patients of a specialist center for eating disorders located in the Netherlands. RESULTS: Assessment of the validity of the EDQ-O yielded acceptable to good AUC (area under the receiver operating characteristic curve) values with a range from 0.72 to 0.83. Most other diagnostic efficiency statistics were also good except for a low sensitivity for AN (0.44), a low positive predictive value for BN (0.50), and a relatively low sensitivity for BED (0.66). CONCLUSION: The results of the present study suggest that the EDQ-O performs acceptably as a diagnostic instrument for all DSM-IV-TR eating disorder classifications. However, suggestions are made to further improve the validity of the EDQ-O.
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