TNF and sarcopenia: In order to further elaborate the related factors of sarcopenia, we included the 15 significantly variables: BMI, FGF19, GDF11, ALT, AST, ALB, γ-GT, CREA, UA, GLU, TG, LDL, GDF15, TNF-α and IL6 from the above univariate analysis into the binary analysis, an analysis of multiple determinants of the sarcopenia was conducted using a stepwise conditional logistic regression with p < 0.05 (Table 3).