Validation of the Persian Version of Inflammatory Bowel Disease Questionnaire in Patients Who Referred to Clinics and Hospitals of Birjand University of Medical Sciences, Iran

Inflammatory bowel disease (IBD) questionnaire is a disease-specific questionnaire to measure the health related quality of life (QOL) in patients with inflammatory bowel disease.
The current study aimed at assessing the validity of the Persian version of the QOL questionnaire in patients with inflammatory bowel disease referred to the clinics and hospitals affiliated to Birjand University of Medical Sciences, Iran.
The current cross sectional study included 87 patients who referred to the clinics and hospitals affiliated to Birjand University of Medical Sciences from 2014 to 2015; IBD diagnosis was confirmed in the subjects by the pathological analyses and accordingly they were asked to complete the Persian version of IBDQ. Data were analyzed by SPSS (15) using descriptive statistics, internal consistency reliability, construct validity (by the short-form 36), and factor analysis was used for the structural validity of the questionnaire.
A total of 87 patients with the mean age of 38.80 ± 16.17 years enrolled in the study. Mean score of QOL based on IBDQ questionnaire, was 158.99 ± 24.9 out of 224. The factor analysis of the Persian version did not confirm the structural factor of the original questionnaire. Cronbach’s alpha for the questionnaire was 0.94, in domains from 0.68 to 0.89. The correlation between the domains of QOL in IBDQ and SF-36 inventory were 0.44 to 0.69
Due to the high internal consistency and correlation coefficients with SF-36 inventory, it can be used in the studies to evaluate the QOL in the patients.