Table 4.

The result of the two-piecewise Cox proportional hazards regression model by gender.

Incident DM	All participants (HR, 95%CI, P)	Female (HR, 95%CI, P)	Male (HR, 95%CI, P)
Fitting model by standard linear regression	1.08 (1.02, 1.14) 0.0055	1.13 (1.04, 1.24) 0.0061	1.05 (0.98, 1.13) 0.1511
Fitting model by two-piecewise Cox proportional hazards regression
The inflection point of RFM	22.06	39.23	23.08
≤ Inflection point	0.97 (0.90, 1.05) 0.4941	1.11 (1.01, 1.21) 0.0256	0.98 (0.91, 1.06) 0.5899
> Inflection point	1.12 (1.06, 1.19) 0.0002	1.39 (1.17, 1.65) 0.0002	1.16 (1.06, 1.28) 0.0012
P for log-likelihood ratio test	0.002	0.009	0.002

Note 1: In all participants, we adjusted gender, age, BMI, alcoholic intake, smoking status, exercise habits, SBP, DBP, ALT, AST, GGT, HDL-C, TC, TG, HbA1c, and FPG.

Note 2: For female and male subgroups, we adjusted for age, BMI, alcoholic intake, smoking status, exercise habits, SBP, DBP, ALT, AST, GGT, HDL-C, TC, TG, HbA1c, and FPG.

HR: hazard ratios; CI: confidence; DM: diabetes mellitus; RFM: relative fat mass