TABLE 4.

Linear regression analyses for the association between non-insulin-based IR indices and CAVI in age subgroup.

Variables		β (95%CI), CAVI
		Model 1	Model 2
Per SD increase	Age ≤ 40 years old
TG/HDL-C		0.078 (0.048–0.108)**	-0.010 (-0.070 to 0.050)
TyG		0.114 (0.082–0.146)**	0.006 (–0.009 to 0.137)
METS-IR		0.039 (0.007–0.071)*	0.103 (-0.098 to 0.304)
Per SD increase	Age > 40 years old
TG/HDL-C		0.068 (0.018–0.117) *	-0.015 (-0.151 to 0.121)
TyG		0.132 (0.086–0.177) **	0.135 (0.043–0.226) *
METS-IR		0.048 (0.002–0.094) *	0.097 (-0.136 to 0.330)

TG, triglyceride; HDL-C, high density lipoprotein cholesterol; TyG, triglyceride and glucose index; METS-IR, metabolic score for insulin resistance; CAVI, cardio-ankle vascular index; SD, standard deviation; CI, confidence interval.

Model 1: unadjusted.

Model 2: adjusted for age, sex, BMI, smoking, drinking, prehypertension, diabetes mellitus, hyperuricemia, renal dysfunction, SBP, and DBP; FPG, CREA, UA, TG, TC, HDL-C, and LDL-C.

*p < 0.05; **P < 0.001.