Risk factors and long-term prognosis for colorectal strictures in ulcerative colitis

Figure 1 Cumulative incidence of stricture after ulcerative colitis diagnosis among the overall cohort. The cumulative incidence of developing strictures was 6.8% at 5 years, 11.3% at 10 years, 16.4% at 15 years, and 26.4% at 20 years after diagnosis. UC: Ulcerative colitis.

Figure 2 Cumulative incidence of ulcerative colitis-related surgery, colorectal cancer, and all-cause mortality in the stricture group and non-stricture group. A: Fine-Gray competing risk model analysis of ulcerative colitis-related surgery; B: Fine-Gray competing risk model analysis of colorectal cancer; C: Kaplan-Meier analysis of all-cause mortality. UC: Ulcerative colitis; CRC: Colorectal cancer; SHR: Sub-distribution hazard ratio.

Figure 3 Age-specific prevalence of colonic stricture and all ulcerative colitis-related colorectal cancer among the overall cohort. Prevalence of stricture and colorectal cancer was calculated within each age group. Data represent age-specific cross-sectional prevalence based on the proportion of patients diagnosed at the time of assessment. UC: Ulcerative colitis; CRC: Colorectal cancer.

Figure 4 Cumulative incidence of ulcerative colitis-related surgery and all-cause mortality in the benign-stricture group and malignant-stricture group. A: Fine-Gray competing model of ulcerative colitis-related surgery; B: Kaplan-Meier analysis of all-cause mortality. UC: Ulcerative colitis; SHR: Sub-distribution hazard ratio.