The importance of sarcopenia as a prognostic predictor of the clinical course in acute severe ulcerative colitis patients

Acute severe ulcerative colitis (ASUC) is a life-threatening condition that requires timely referral for therapy. Sarcopenia has been associated with clinical outcomes of inflammatory bowel disease (IBD). This study investigated the role of sarcopenia in predicting the clinical course of ASUC.This retrospective cohort study included ASUC patients with abdominal CT scans. Univariate and multivariable regression analyses were performed to identify a practical predictive index for the clinical course of ASUC.Of 233 included patients, 151 had intravenous corticosteroid (IVS) failure, among whom 32 received surgery without medical rescue therapy. Fifty patients underwent colectomy after medical rescue therapy failure. Of these 82 surgical patients, 42 suffered postoperative complications. Multivariable regression analysis showed that sarcopenia remained an independent risk factor for IVS failure (OR=2.969; 95% CI, 1.547-5.701; p = 0.001), colectomy after medical rescue therapy failure (OR=3.411; 95% CI, 1.147-10.141; p = 0.027), and postoperative complications after colectomy (OR=4.157; 95% CI, 1.364-12.667; p = 0.012). During follow-up, patients with colectomy after first-line treatment had a lower comprehensive complication index and better health-related quality of life.Sarcopenia is useful in predicting the clinical course and postoperative outcomes of ASUC.