Fig. 4From: Risk factors and long-term outcome of disease extent progression in Asian patients with ulcerative colitis: a retrospective cohort studyCumulative rate of a) steroid utilization, and b) immunosuppressive agents use in patients with and without disease progression. Time to event was calculated from the date of index endoscopy evaluation to the date of steroids or IMM use or censoring (the last follow-up). Kaplan–Meier estimates were used to draw the cumulative incidence curves, compared by log-rank tests.Back to article page