Crohn's disease and ulcerative colitis, the two major forms of inflammatory bowel disease (IBD) are chronic disabling conditions characterized by flares followed by periods of remission. However, IBD patients are seen every 3 to 6 months in the outpatient clinic, and the occurrence of a flare between two outpatient visits is not captured. In the current state of knowledge, there is no validated patient-reported outcome (PRO) tool to measure the phenomenon of flare in IBD. This study aimed to use an innovative methodology to collect messages posted by patients in an Internet forum for developing and validating a PRO measuring flare in IBD. The design involves 1) Engineering sciences for scraping extraction of messages posted in an Internet forum and for Identification of messages related to flare, 2) Qualitative methods for thematic content analyze of the messages posted, for candidate items generation, for items selection (Delphi process) and for items adjustment ("think aloud" interviews), 3) Quantitative methods for psychometric validation of the PRO.
Study Type
OBSERVATIONAL
Enrollment
260
Delph Process : expert panel will include HCPs and patients. They will evaluate the relevance of items on a Likert scale (HCPs N = 25 ; Patients N = 25 ) "Think aloud" interviews (N = 10 patients) Psychometric validation ( N = 200 patients)
Scale calibration of the new developped questionnaire
Weighing scale calibration
Time frame: About 30 minutes
Construct validity of the new developped questionnaire
Exploratory factor analysis, discriminant validity by Kruskal-Wallis tests
Time frame: About 30 minutes
Convergence proprieties of the new developped questionnaire
Convergence test of Flare-IBD scores with objective biological markers and clinical markers used in routine clinical practice
Time frame: about 30 minutes
Reproductibility of the new developped questionnaire
Investigation of test-retest reliability with a second questionnaire administered 8 days later.
Time frame: Up to 8 days
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