Table 2.

Association of the TyG index with the absolute change, change rate and slope of baPWV

	model 1			model 2			model 3
	β	95% CI	P value	β	95% CI	P value	β	95% CI	P value
Change of baPWV (cm/s)
TyG (continuous)	32.034	4.642–59.425	0.022	57.119	22.835–91.402	0.001	149.582	90.823–208.342	< 0.001
Quartile 2 (ref: quartile 1)	59.745	10.509–108.982	0.017	61.086	12.582–109.59	0.014	76.297	28.63–123.964	0.002
Quartile 3	85.613	36.416–134.81	0.001	93.631	43.889–143.373	< 0.001	102.562	52.08–153.044	< 0.001
Quartile 4	74.957	25.494–124.42	0.003	98.555	37.584–159.526	0.002	129.525	58.723–200.326	< 0.001
P for trend			0.002			< 0.001			< 0.001
Change rate of baPWV (cm/s/year)
TyG (continuous)	11.892	3.415–20.368	0.006	17.974	7.307–28.642	0.001	40.372	21.853–58.891	< 0.001
Quartile 2 (ref: quartile 1)	11.870	-3.385–27.125	0.127	12.122	-2.986–27.229	0.116	16.529	1.507–31.551	0.031
Quartile 3	20.615	5.373–35.858	0.008	22.642	7.149–38.135	0.004	24.390	8.481–40.299	0.003
Quartile 4	24.616	9.291–39.941	0.002	30.750	11.76–49.741	0.002	37.607	15.294–59.919	0.001
P for trend			0.001			0.001			< 0.001
Slope of baPWV
TyG (continuous)	9.570	1.538–17.601	0.020	14.238	4.121–24.355	0.006	34.874	17.238–52.51	< 0.001
Quartile 2 (ref: quartile 1)	10.986	-3.469–25.441	0.136	10.888	-3.439–25.215	0.137	14.872	0.57–29.175	0.042
Quartile 3	18.739	4.296–33.182	0.011	20.092	5.399–34.785	0.007	22.163	7.016–37.31	0.004
Quartile 4	20.126	5.604–34.647	0.007	23.648	5.639–41.658	0.010	30.576	9.332–51.82	0.005
P for trend			0.004			0.003			0.002

Model 1: Adjusted age and sex; Model 2: Age, sex, BMI, smoking status, drinking status, physical activity, diabetes, dyslipidaemia, baPWV at baseline, and MAP at baseline and follow-up; Model 3: Model 2 plus FBG, triglyceride, PBG, LDL-C, eGFR, uric acid, homocysteine, and use of antidiabetic, lipid-lowering, or antihypertensive medications at baseline and follow-up