“…Twenty articles were excluded for the following reasons: the reported instrument was not patient-reported (10); the reported instrument did not assess disease activity (6); or the article did not provide measurement properties of the PROM (4). Finally, 17 articles were included covering the following instruments: self-administered SCCAI, 9 6-point Mayo score, 10,11 patient-assessment of disease activity, 11 Manitoba Inflammatory Bowel Disease Index (MIBDI), 12 survey-index CDAI, 13 patient-based PUCAI, 14 patients' global assessment, 15 patient-SCCAI, 16 patient-HBI, 17 Numeric Rating Scale (NRS), 18 mobile health index (mHI), 19 patient-reported outcome derived from the Mayo score (PRO2), 20 patient-reported outcome derived from the CDAI (PRO3), 21 simple 0-10 numerical score (IBD-10), 22 patient-reported HBI, 23 patient-reported SCCAI, 23 digital self-administered SCCAI, 24,25 and digital self-administered HBI. 25…”