Prevalence, clinical characteristics, risk factors, and indicators for lean Chinese adults with nonalcoholic fatty liver disease

Figure 1 Flowchart of study participants. HBV: Hepatitis B virus; HCV: Hepatitis C virus; AUS: Abdominal ultrasound.

Figure 2 Numbers of 2715 participants divided by various parameters including body mass index, waist circumference, and the diagnosis of non-alcoholic fatty liver disease. BMI: Body mass index; WC: Waist circumference; NAFLD: Non-alcoholic fatty liver disease.

Figure 3 Fatty liver index in different groups divided by various parameters including body mass index, waist circumference, and the diagnosis of non-alcoholic fatty liver disease. A: Fatty liver index (FLI) of non-alcoholic fatty liver disease (NAFLD) and non-NAFLD groups in the population with a body mass index (BMI) < 23 kg/m²; B: FLI of non-NAFLD and NAFLD groups in the population with a BMI ≥ 23 kg/m² but < 25 kg/m²; C: FLI of non-NAFLD and NAFLD groups in the population with a BMI ≥ 25 kg/m²; D: FLI of non-NAFLD and NAFLD groups in the population with a BMI < 23 kg/m² with a normal waist circumference; E: FLI of non-NAFLD and NAFLD groups in the population with a BMI ≥ 25 kg/m² with a large waist circumference. FLI: Fatty liver index; BMI: Body mass index; NAFLD: Non-alcoholic fatty liver disease.

Figure 4 Receiver operating characteristic curves of fatty liver index and waist-height ratio for identifying undiagnosed non-alcoholic fatty liver disease in lean participants with a normal waist circumference. A: Receiver operating characteristic curve of the fatty liver index for identifying undiagnosed non-alcoholic fatty liver disease in lean participants with a normal waist circumference; B: Receiver operating characteristic curve of the waist-height ratio for identifying undiagnosed non-alcoholic fatty liver disease in lean participants with a normal waist circumference. ROC: Receiver operating characteristic; FLI: Fatty liver index.