Fig. 1

Prevalence of NAFLD according to the quartiles of TyG (a) or ALT (b). Classification of TyG quartiles: Q1 (~8.0), Q2 (8.1 ~ 8.4), Q3 (8.5 ~ 8.9), Q4 (9.0~); ALT (U/L) quartiles: Q1 (~14.0), Q2 (14.1 ~ 20.0), Q3 (20.1 ~ 29.0), Q4 (29.1~). NAFLD, nonalcoholic fatty liver disease; ALT, alanine aminotransferase; Q1, first quartile; Q2, second quartile; Q3, third quartile; Q4, fourth quartile