Fig. 4
Mediating effect of percent body fat on the relationship between body mass index and frailty, using single-mediation regression model by Andrew F. Hayes. * p <0.001. Participant with body mass index 18.5–24.9 kg/m2 as a reference group. The numbers were presented in beta-coefficients (standard error). All regression models were adjusted for age, sex, educational level, marital status, employment status, and smoking. Data from the 2001–2006 cohorts of NHANES