A nonlinear relationship between the triglycerides to high-density lipoprotein cholesterol ratio and stroke risk: an analysis based on data from the China Health and Retirement Longitudinal Study

Table 5 The result of the two-piecewise Cox proportional hazards regression model

Incident stroke	HR (95% CI)	P
Fitting model by standard Cox regression	1.03 (1.00, 1.05)	0.0426
Fitting model by two-piecewise Cox proportional hazards regression model
The inflection point of TG/HDL-C ratio
≤ 1.85	1.28 (1.06, 1.54)	0.0089
> 1.85	1.01 (0.98, 1.04)	0.6738
P for the log-likelihood ratio test	0.016

We adjusted for BMI, gender, age, drinking status, physical activity, smoking status, drugs for cardiovascular prevention, hypertension, FPG, TC, CRP, LDL-C, Scr, HbA1c, Cystatin C, and UA
HR hazard ratios, CI confidence, TG/HDL-C ratio ratio of triglyceride to high-density lipoprotein cholesterol

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