| Autor: |
Gebeyehu, Gerum G, Taylor, Frederick, Dobson, Liz, Cummings, J R Fraser, Bloom, Stuart, Kennedy, Nicholas A, Christiansen, Paul, Bodger, Keith |
| Zdroj: |
Journal of Crohn's & Colitis; Feb2024, Vol. 18 Issue 2, p275-285, 11p |
| Abstrakt: |
Background The IBD-Control Questionnaire is a simple, generic measure of patient-perceived disease control used increasingly in clinical practice and research. We aimed to address knowledge gaps in its psychometric performance, to ensure that it can be used with confidence in a variety of contexts. Methods We analysed 7341 responses to the IBD Registry COVID-19 survey, sent to 40 911 patients who completed an online self-assessment tool during the pandemic. Questions covered demographics, comorbidities, inflammatory bowel disease [IBD] sub-type, and IBD-Control Questionnaire and symptom scores [CD-PRO2 or UC-PRO2]. Psychometric properties of IBD-Control-8 were tested overall and within subgroups (Crohn's disease [CD], ulcerative colitis [UC] and IBD unclassified; male and female; ≤65 and >65 years; number of co-morbidities; deprivation status). Results Internal consistency was very strong overall [α: 0.84, ω: 0.89] and for each subgroup [α range: 0.81–0.85; ω: 0.86–0.90]. Construct validity was demonstrated by moderate correlation of each item with global rating [VAS] [ r s range: 0.47–0.65], strong correlation between IBD-Control-8 score and VAS [ r s = 0.74], moderate-to-strong with PRO2 scores [CD: r s = −0.718; UC: r s = −0.602] and significantly higher IBD-Control-8 scores for PRO2-remission vs PRO2-active, consistent across subgroups. Exploratory and confirmatory factor analyses demonstrated a two-factor model (items loading onto 'Health-related Quality of Life' [HRQoL] or 'Treatment' domains). Extensive tests for factorial invariance confirmed consistency. Conclusions IBD-Control-8 is a psychometrically robust scale which can be used across a range of populations. It offers a quick, reliable, and valid method of assessing patient-perceived control. The construct of 'control' includes traditional HRQoL and a novel domain relating to treatment perception. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
