“…18,20–24,26–31,33–42 The median follow-up time was 12 months [IQR 10–22.9], and follow-up data were extracted from medical records or insurance data in 38.6% of associations, 16,17,19,25,27,32,42 assessed during hospital visits in 33.1% 18,21,23,24,27,29–31,33,34,36–38 and self-reported in 28.6%. 20,22,25,26,28,35,39–41 Twelve [44.4%] studies included both CD and UC, 16,17,19,20,22,28,32–35,40,41 and two of these included IBD-U or IC as well. 33,40 Ten studies included only CD patients, 18,23–27,31,36,38,42 and five studies only UC.…”