TNF and ulcerative colitis: Among ulcerative colitis (UC) patients, the persistence rates were 35% for anti-TNF and 75% for UST, with UST again showing greater persistence as indicated by KM analysis (log-rank p = 0.036, Fig. 3) and Cox regression (HR: 0.28, 95% CI: 0.08–0.996, p = 0.049).