Table 2.

The distributions of vitamin D level in case and control population stratified by age.

	Cases		Controls		t-value	P-value
	N	Vit D (nmol/L)	N	Vit D (nmol/L)
Age (Y)
15~24	19	81.16 ± 8.88	68	79.87 ± 7.17	−0.66	0.513
25~44	22	78.45 ± 8.66	53	76.57 ± 5.39	−0.95	0.350
45~59	17	72.53 ± 10.87	51	69.55 ± 10.11	−1.03	0.305
>60	12	66.58 ± 10.36	38	62.50 ± 7.76	−1.46	0.150
F-value	6.90	47.22	–	–
P-value	<0.001	<0.001	–	–
Total	70	75.71 ± 10.75	210	73.39 ± 10.01	−1.49	0.137