In the BMI <28 kg/m2 group, after adjusting for gender, age, hypertension, diabetes, hyperlipidemia, FBG, HbA1c, TG, T-CHO, LDL-C, HDL-C, ALT, AST, GGT, TBIL, ALB, SCr, and SUA, CAP was positively correlated with FT3/FT4 before the inflection point at CAP = 277 dB/m (β = 0.000, p < 0.0001) but was not correlated with FT3/FT4 after the inflection point. The gene discussed is ALB; the disease is diabetes mellitus.