Ulcerative colitis severe scores of the patients with UC-CRS and the patients with UC-only were recorded at week 0 (A) and week 12 (B). Bars represent summary scores from clinical observation. Data were presented as numbers of patients of each score. χ2 analyses were performed with the data between the two groups. The results showed p > 0.05 at week 0 and p < 0.05 at week 12.