Internal consistency and validity of the BITE for the screening of bulimia nervosa in university students, Colombia

Neuropsychiatry Research Group, Facultad de Medicina, Universidad Autónoma de Bucaramanga, UNAB, Bucaramanga, Colombia.
Eating and weight disorders: EWD (Impact Factor: 0.79). 07/2008; 13(2):e35-9.
Source: PubMed


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.

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Available from: Paul Anthony Camacho Lopez, Apr 15, 2015
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    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 01/2014; 47(1):105-21. DOI:10.1002/eat.22183 · 3.13 Impact Factor
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    ABSTRACT: Background: Attention deficit hyperactivity disorder (ADHD) prevalence is increased in eating disorder patients, especially in bulimia nervosa. ADHD may be associated with bulimia and binge eating because both disorders share certain clinical features. Objective: The purpose of the present study was to explore the association between ADHD symptoms and bulimia symptoms in Taiwan. Methods: We recruited 409 college students from a medical school. We assessed the participants with Adult ADHD Self-Report Scale Chinese Version (ASRS), the Bulimic Investigatory Test, Edinburgh (BITE), Chinese version of the Patient Health Questionnaire (PHQ-9), and the Family APGAR scale. Multiple regression was performed to investigate the relationship between the bulimic and binge eating symptoms with the age, gender, depression symptoms, family support and ADHD symptoms. Results: College students screened positive with bulimia had significantly higher depression, hyperactivity and impulsivity symptoms than those screened negative (p < 0.05). The ASRS inattention and hyperactivity/impulsivity scores were modestly correlated with BITE symptoms, severity and total scores. The result of subsequent linear regression showed that hyperactivity/impulsivity and depression symptoms were constantly associated with BITE symptoms, severity and total scores. Conclusions: The present study showed that hyperactivity, impulsivity and depression symptoms are associated with binge eating behaviors. Assessment for eating disorder in ADHD patients may be indicated.