GPT and diabetes mellitus: Univariate analysis of the relationship between NAFLD and clinical features, blood biochemical parameters, glucose metabolism levels of different tissues, as well as abdominal fat volume and distribution showed that NAFLD had significant positive correlations with BMI, diabetes, insulin resistance, serum TSH, ALT and AST, mediastinal blood pool, spleen SUVmean, VAT and SAT volumes, with the correlation coefficient r = 0.154–0.390 (P < 0.05), but significant negative correlation with myocardial SUVmean with correlation coefficient r = − 0.320 (P < 0.001).