Translation and psychometric evaluation of the Spanish version of the Inflammatory Bowel Disease Knowledge (IBD-KNOW) questionnaire.

Objective: To translate, culturally adapt, and validate the Inflammatory Bowel Disease Knowledge questionnaire in adult Spanish-speaking patients with IBD.

Patients and methods: A cross-sectional translation and linguistic validation study was conducted with 30 participants aged>18 years with Inflammatory Bowel Disease at the Miguel Servet University Hospital (Zaragoza, Spain). The IBD-KNOW questionnaire was translated and culturally adapted following ISPOR guidelines. Content validity was assessed by a panel of experts using Aiken's V coefficient. Internal consistency was evaluated using Cronbach's alpha, and test-retest reliability was assessed with the intraclass correlation coefficient (ICC). Descriptive analyses and bivariate tests were used to evaluate sociodemographic and clinical variables, as well as associations with IBD knowledge.

Results: The study assessed 30 adults (50% female) with an average age of 44.21±15.05 years; mean age at diagnosis 29.24±11.42 years and mean disease duration 14.97±8.70 years. The Spanish version of the IBD-KNOW demonstrated good internal consistency (Cronbach's α=0.74) and strong test-retest reliability (ICC=0.80; 95% CI: 0.62-0.89). No statistically significant differences were found between the test and retest scores (p=0.39) or completion times (p=0.736). The mean questionnaire score was 5.87±1.53 out of 10.

Conclusions: The Spanish version of the IBD-KNOW questionnaire is a valid, reliable, and culturally appropriate instrument for assessing disease-related knowledge in Spanish-speaking IBD patients. Its use in clinical settings can support the identification of educational needs and the design of targeted interventions aimed at improving patient engagement and health outcomes.