Background: For people with inflammatory bowel disease, validated knowledge questionnaires are valuable to identify gaps in understanding and explore the impact on disease variables.
Aims: The aim of this study was to validate the short knowledge questionnaire Inflammatory Bowel Disease Knowledge Inventory Device 2, known as IBD-KID2, for use with adults with inflammatory bowel disease.
Methods: Concurrent validity of IBD-KID2 was assessed by comparing scores with those achieved on the Crohn's and Colitis Knowledge Score (CCKNOW). IBD-KID2 reliability was assessed with test-retest completion at two time points, generalizability assessed by comparing IBD-KID2 cohort scores at different recruitment centres, and acceptability assessed using participant survey.
Results: Seventy-five adults with inflammatory bowel disease completed the study. The mean percentage scores achieved on the IBD-KID2 and CCKNOW were 72.8% (SD 16.0) and 49.7% (SD 18.2), respectively. There was a significant correlation between IBD-KID2 and CCKNOW scores (R 0.573, P < 0.005), confirming concurrent validity. IBD-KID2 reliability was confirmed as no significant difference was seen between scores at test and retest (mean difference -0.2, P = 0.92). Generalizability was established as no significant score difference was seen between recruitment centres after controlling for population differences. The acceptability survey showed that 49 (69%) participants preferred IBD-KID2 to the CCKNOW, 60 (85%) found the IBD-KID2 easier to complete, and 38 (53%) considered the CCKNOW as most suitable for adults.
Conclusions: IBD-KID2 is a valid, reliable, and generalizable tool for measuring knowledge in adults with inflammatory bowel disease with good acceptability. IBD-KID2 is easy and quick to complete, hence limiting respondent burden.
Keywords: Concurrent validity; Crohn’s disease; IBD-KID2; Inflammatory bowel disease; Knowledge questionnaire; Reliability; Ulcerative colitis.
© 2022. The Author(s).