ALB and Insulin resistance: In subgroup analysis, the negative association of FTI with serum methylbutyrate level and valerate/isovalerate ratio was only found in the patients who were older, female, and had glycated hemoglobin ≤ 7%, urinary albumin-creatinine ratio < 30 mg/g, homeostatic model assessment for insulin resistance ≤ median value, and body mass index < 30 kg/m2.