Table 2.

Association of VECAC and CDAI with CVD mortality among patients with CKD in the NHANES (2007–2018).

	VCEAC							CDAI
	Q1	Q2		Q3		Q4		Q1	Q2		Q3		Q4
		HR (95% CI)	p Value	HR (95% CI)	p Value	HR (95% CI)	p Value		HR (95% CI)	p Value	HR (95% CI)	p Value	HR (95% CI)	p Value
CKD 1–2 stage
Model1	Ref	0.74(0.49–1.10)	.135	0.77(0.52–1.13)	.184	0.83(0.55–1.25)	.364	Ref	1.01(0.68–1.51)	.957	1.12(0.72–1.74)	.620	1.11(0.70–1.76)	.661
Model2	Ref	0.76(0.51–1.13)	.172	0.55(0.35–0.87)	.010	0.69(0.45–1.04)	.077	Ref	0.85(0.51–1.40)	.520	0.75(0.44–1.27)	.278	0.84(0.48–1.49)	.559
Model3	Ref	0.82(0.54–1.25)	.352	0.51(0.32–0.81)	.004	0.64(0.40–1.01)	.057	Ref	0.82(0.50–1.36)	.444	0.73(0.43–1.24)	.244	0.82(0.46–1.47)	.501
CKD 3–5 stage
Model1	Ref	0.95(0.53–1.71)	.858	1.05(0.56–1.97)	.884	1.10(0.56–2.15)	.791	Ref	1.36(0.80–2.32)	.251	1.64(0.97–2.79)	.066	1.64(0.97–2.77)	.066
Model2	Ref	1.04(0.55–1.96)	.902	0.87(0.51–1.48)	.604	1.01(0.55–1.87)	.969	Ref	1.14(0.68–1.90)	.615	1.44(0.84–2.48)	.186	1.29(0.73–2.27)	.381
Model3	Ref	1.08(0.55–2.13)	.813	0.79(0.46–1.39)	.418	1.01(0.50–2.02)	.981	Ref	1.27(0.75–2.13)	.370	1.58(0.92–2.71)	.097	1.36(0.79–2.36)	.267

VCEAC: Vitamin C Equivalent Antioxidant Capacity; CDAI: Component Dietary Antioxidant Index; HR: hazard ratio; CI: confidence interval; Q: quartile.

Notes: Model1: adjusted for age, sex, ethnicity, income, and education level. Model 2: Model1 + potassium, protein, carbohydrates, dietary fiber, total fat, alcohol intake, smoking, and MET-PA, and total energy intake was adjusted via the residual method; Model3: Model2 + diabetes, hypertension, CVD and cancer, urine albumin, eGFR, BMI.