P474 IBD-Disk : Towards validating the classical Arabic version of the questionnaire ?

Abstract

Abstract Background The IBD-Disk is a validated 10-question, self-administered visual questionnaire used to assess the inflammatory bowel disease (IBD) related disability. It has been translated into several languages and validated in different populations since its emergence. The aim of our study is to explore the internal consistency and item reliability of the IBD-Disk in its classical Arabic version, and to analyze the strength of correlation between each item and the sum of the scale. Methods We conducted a monocentric cross-sectional study including IBD patients. All individuals completed the IBD-Disk questionnaire in classical Arabic. The internal consistency of the IBD-Disk was assessed using Cronbach's alpha between item combinations. A value > 0.70 was considered acceptable, > 0.80 good, and > 0.90 excellent. Cronbach's corrected correlation was assessed using Pearson's correlation coefficient. Results We included 166 patients, 53.6% were men and 69.3% had Crohn's disease. Median age was 38 years [30 - 48]. The mean total score was 36.4 ± 21.0. The "Energy", "Emotions" and "Education & work" items had the highest scores (4.9 ± 2.9, 4.7 ± 3.1, and 4.4 ± 3.2 respectively). Including the 10 items of the IBD-Disk scale, a value of 0.913 95% CI [0.893-0.932] was observed for Cronbach's alpha, demonstrating good reliability between the different sub-scores. By performing the removal procedure one by one, Cronbach's alpha varied between 0.902 and 0.915, confirming that all items contribute to the construct. In addition, all items showed a Cronbach corrected correlation between each item and the rest of the scale r > 0.4, p<0.001. Energy showed the highest correlation (r=0.751), and joint pain the lowest (r=0.506) (Table 1). Also, Cronbach's alpha was positive for every pair of IBD-Disk items at the start of the study. The item pairs that showed the best correlation were [Abdominal pain - Regulating defecation], [Energy - Regulating defecation] and [Energy - Sleep]. In contrast, the item pairs that were least interconnected were [Abdominal pain - Joint pain], [Interpersonal interaction - Joint pain] and [Body image - Joint pain] (Table 2). Conclusion Our work has demonstrated excellent item homogeneity in the classical Arabic version of the IBD-Disk, and a good correlation between each item and the remaining total score. However, a prospective measurement of the intra-class correlation coefficient of the classical Arabic version will be necessary to assess its reproducibility over time.