Internal consistency and validity of the BITE for the screening of bulimia nervosa in university students, Colombia.
ABSTRACT To establish the validity and internal consistency of the bulimic investigatory test, Edinburgh (BITE) in a non-clinical population of university students in Colombia.
A validation study with a cross-sectional sampling was designed. Two-hundred and sixty-one students were evaluated independently and blindly with BITE and the Composite International Diagnostic Interview. Kuder-Richardson's test, sensitivity, specificity, predictive values, likelihood values, Cohen kappa, area under the ROC curve for BITE's symptoms scale and Cronbach's alpha for severity scale were computed.
The Kuder-Richardson's test was 0.86, two factors were identified which explain the 22.68% and 7.12% of variance. Cronbach's alpha for severity scale was 0.52. Area under ROC curve was 0.9736. The best cutoff point was 11 with sensitivity of 94.59%, specificity of 91.52%, positive predictive value of 64.81%, negative predictive value of 99.03%; with a concordance of 0.7226.
The BITE's symptom scale is useful in identifying clinically binge-eaters in university students.
- SourceAvailable from: Mei-Chih Meg Tseng[Show abstract] [Hide abstract]
ABSTRACT: To compare the validity of the Eating Attitudes Test (EAT) and the Bulimic Investigatory Test Edinburgh (BITE) as screening tools for eating disorders (EDs), and to identify a new threshold for each questionnaire to detect ED cases among dance and nondance students. Dance students enrolled in high schools with gifted dance programs and nondance students randomly chosen from the same or nearby schools were invited to participate in a 2-phase ED survey. Participants completed the EAT and BITE questionnaires in the first phase. All participants who screened positive and 10% of the participants who screened negative were interviewed blindly using the Structured Clinical Interview for DSM-IV-TR Axis I Disorders Patient Edition. The BITE had better accuracy than the EAT in detecting ED in general among both dance and non-dance students. BITE scores of 19 and 16 were the optimal cutoff values for determining ED among dance and nondance students, respectively. The optimal cutoff value for the EAT to diagnose an ED was 19 for dance students and 12 for nondance students. Both questionnaires showed higher sensitivity and lower specificity in dance students than nondance students at the same cutoff points. The BITE had better diagnostic performance than the EAT in this nonclinical population, although its ability to detect restrictive behaviors is likely as limited as that of the EAT. Plausible explanations for these results and limitations of this study are discussed in the text. © 2013 Wiley Periodicals, Inc. (Int J Eat Disord 2013).International Journal of Eating Disorders 02/2014; 47(1):105-21. DOI:10.1002/eat.22183 · 3.03 Impact Factor