Table 3.

Association between plasma Vitamin C level and each of prealbumin, hsCRP and albumin levels adjusted for cofounders in multiple linear regressions

	variable	Beta	95%CI		t value	P value
			lower	upper
prealbumin	VitC(per category increase)	0.155	7.021	29.477	3.186	0.002
	age	-0.243	-66.011	-28.674	-4.970	0.000
	Diabetes	-0.162	-63.307	-15.387	-3.219	0.001
	gender	0.125	5.590	44.194	2.528	0.012
	modality	0.424	39.327	66.793	7.573	0.000
	hsCRP(mg/l)	-0.255	-2.888	-1.337	-5.340	0.000
	bicarbonate (mmol/l)	-0.038	-3.561	1.613	-0.738	0.461
	SBP(mmHg)	0.030	-0.335	0.627	0.594	0.553
	statins	0.175	17.612	59.441	3.611	0.000
Log10hsCRP	VitC(per category increase)	-0.117	-0.195	-0.001	-1.984	0.048
	age	0.295	0.249	0.569	5.023	0.000
	Diabetes	-0.009	-0.224	0.192	-0.152	0.879
	gender	0.089	-0.042	0.293	1.472	0.142
	modality	-0.071	-0.182	0.057	-1.030	0.304
	bicarbonate (mmol/l)	-0.081	-0.037	0.008	-1.295	0.196
	SBP(mmHg)	-0.220	-0.012	-0.003	-3.581	0.000
	statins	0.025	-0.142	0.220	0.421	0.674
albumin	VitC(per category increase)	0.065	-0.246	0.928	1.138	0.256
	age	-0.252	-3.138	-1.214	-4.432	0.000
	Diabetes	-0.214	-3.548	-1.035	-3.575	0.000
	gender	-0.013	-1.127	0.900	-0.219	0.827
	modality	-0.176	-1.699	-0.252	-2.641	0.009
	bicarbonate (mmol/l)	-0.085	-0.232	0.040	-1.381	0.168
	SBP(mmHg)	0.099	-0.004	0.046	1.659	0.098
	statins	0.097	-0.148	2.026	1.694	0.091

Abbreviation: Vit C: vitamin C; SBP: systolic blood pressure

VitC(by categories) deficiency 1, insufficiency 2, normal and above 3; Age(by categories) < 60y 0, ≥60y 1; Diabetes: non- Diabetes 0, Diabetes 1; gender: F 0, M 1; modality: HD 1, HDF 2, HFD 3, CAPD 4; statins: without statins 0, with statins 1