How has the disease course of pediatric ulcerative colitis changed throughout the biologics era? A comparison with the IBSEN study

Figure 3 Analysis of corticosteroid-free survival curve after initiation of treatment using Kaplan-Meier method. The solid line represents the proportion of patients who were treated from January 2003 to September 2012 and did not receive corticosteroids. The dotted line represents the same proportion among patients who were treated from October 2012 to October 2020. In the former group, the 2-yr corticosteroid-free retention rate is 21%; in the latter group, the rate is 88% (log-rank test, P = 0.003).