Validation and Reliability of the Turkish Version of the Inflammatory Bowel Disease-Disk in Patients with Inflammatory Bowel Disease.

Authors

Tugba Tolu, Yasemin Kaldirim Armutcuoglu, Tuba Yilmaz Yildirim, Ismail Inci, Tugce Bulun Akyol, Pinar Ay, Yesim Ozen Alahdab, Ozlen Atug, Haluk Tarik Kani

Published in

The Turkish journal of gastroenterology : the official journal of Turkish Society of Gastroenterology. Oct 07, 2026. Epub Oct 07, 2026.

Abstract

The inflammatory bowel disease-disk (IBD-Disk) is a visual patient reported outcome measure designed to assess disease-related burden in patients with IBD. This study aimed to translate and culturally adapt the IBD-Disk into Turkish and evaluate its psychometric performance and association with clinical disease activity.
This prospective validation study was conducted between July 2025 and April 2026 at a tertiary referral center. The IBD-Disk was translated using a standardized forward-backward methodology and pilot tested. Assessments were performed at baseline, after 2 weeks in a clinically stable subgroup to evaluate test-retest reliability, and at 6-month follow-up. Disease activity was assessed using the Harvey-Bradshaw Index for Crohn's disease (CD), partial Mayo score for ulcerative colitis (UC), and the Physician Global Assessment (PGA).
A total of 202 patients were included, comprising 114 with CD and 88 with UC; 136 patients had complete longitudinal data. The Turkish IBD-Disk demonstrated high internal consistency (Cronbach's α = 0.884) and moderate test-retest reliability (intraclass correlation coefficient = 0.68; 95% CI, 0.16-0.90). IBD-Disk scores were moderately correlated with disease activity indices in patients with CD and UC (ρ = 0.525 and ρ = 0.503, respectively; both P < .001) and differed significantly across PGA categories (P < .001). The instrument demonstrated moderate accuracy for detecting active disease (area under the curve = 0.72; 95% CI, 0.65-0.79), with a preliminary receiver operating characteristic-derived cutoff of ≥27.5 (sensitivity 76.1%, specificity 60.5%). Scores decreased significantly among patients with clinical improvement at follow-up (P < .001).
The Turkish version of the IBD-Disk demonstrated acceptable validity and reliability for assessing patient-perceived disease burden in patients with IBD and demonstrated responsiveness to clinical improvement.

PMID:
42909348
Bibliographic data and abstract were imported from PubMed on 23 Oct 2026.

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