Table 1.

Demographic and clinical characteristics of patients stratified by vitamin D status

	Vitamin D deficiency (n=161)	Vitamin D insufficiency (n=306)	Vitamin D sufficiency (n=326)	P -value
Age(year)	66.28±14.6	65.33±14.27	53.76±17.25	<0.001**
Male	67(41.6)	180(58.8)	255(78.2)
Gender				<0.01***
Female	94(58.4)	126(41.2)	71(21.8)
GCS	8.22±3.21	11.18±3.23	12.78±2.89	<0.001***
APACHE	26.30±4.72	22.45±4.11	20.38±3.14	<0.001***
Calcium(mg/dl)	7.80±0.47	8.01±0.39	8.18±0.47	<0.001***
Phosphorous(mg/dl)	3.44±0.44	3.58±0.41	3.67±0.37	<0.001***
Hb(g/dl)	11.14±1.09	11.55±1	12.02±1.28	0.01***
BUN	25.61±5.81	24.64±5.47	20.38±3.14	<0.001***
Cr	1.58±0.52	1.46±0.42	1.40±0.32	<0.001***
Alb(g/dl)	3.16±0.36	3.32±0.29	3.67±0.37	<0.001***
Dialysis	24 (14.9)	14(4.6)	8(2.5)	<0.001**
Hospital (LoS)*	24.13±11.18	12.26±7.91	6.21±4.52	<0.001***
Duration of mechanical ventilation(day)	16.58±9.04	9.02±5.98	7.10±11.27	<0001***

One Way ANOVA; Vitamin D deficiency (<20 ng/mL); Vitamin D insufficiency (20-30 ng/mL); Vitamin D sufficiency (>30 ng/mL).

^* LoS: length of stay; #Number (percent),

^{* *}P value: Comparison within group by χ2 test;

^***P value: Comparison within group by