Fig. 3

Distribution of FIB4 index values by age in non-drinkers with or without fatty liver. This figure shows the distribution of FIB-4 index by age group in a non-drinkers without fatty liver by ultrasonography at health checkups (N = 47,222) and b non-drinkers with fatty liver by ultrasonography at health checkups (NAFLD) (N = 17,968). Light pink color areas represent high risk of liver fibrosis defined by FIB-4 index ≥ 2.67. Light blue color areas represent low-risk of liver fibrosis defined by FIB-4 index < 1.3. The proportions of FIB-4 index ≥ 2.67, the cutoff for high risk of liver fibrosis, were compared by age group in both non-drinkers without fatty liver and NAFLD groups using the Cochran-Armitage test. NAFLD non-alcoholic fatty liver disease