Prevalence and predictive factors of non-alcoholic steatohepatitis (NASH) in morbidly obese patients undergoing bariatric surgery.

Background: In patients with morbid obesity selected for bariatric surgery, previous studies have shown a prevalence of NASH varying from 2.6% to 91%. The prevalence of NASH and extensive fibrosis were studied in a prospective cohort of patients with morbid obesity requiring bariatric surgery, to identify predictive factors of NASH.