GPT and liver disorder: A single-center retrospective study from 2013 evaluated 347 overweight or obese children referred to a pediatric gastroenterology clinic with ALT greater than 2× the upper limit of normal (ULN).15 17.6% of patients were found to have a liver disease other than NAFLD, of which AIH was most common.6 A more recent multicenter, retrospective cohort study by Yodoshi et al from 2021 assessed 900 children with obesity.