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Fig. 3 | BMC Gastroenterology

Fig. 3

From: Risk factors and long-term outcome of disease extent progression in Asian patients with ulcerative colitis: a retrospective cohort study

Fig. 3

Comparison of disease progression in patients with a) different disease extent at diagnosis and b) steroid-dependence or not. The effect of disease distribution or steroids dependence on the probability of disease progression was evaluated using time-to-event [survival] methods for censored observations, because of the varying length of follow-up. Time to event was calculated from the date of diagnosis to the date of disease progression or censoring. Kaplan–Meier estimates were used to draw the cumulative incidence curves, compared by log-rank tests

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