Table 1.

The distributions of vitamin D level in different sex population.

	Cases		Controls		t-value	P-value
	N	Vit D (nmol/L)	N	Vit D (nmol/L)
Sex
Male	31	78.81 ± 10.81	93	72.67 ± 10.88	−2.49	<0.05
Female	39	73.26 ±10.17	117	73.96 ± 9.27	0.40	0.690
t-value	1.99	−0.91	–	–
P-value	0.051	0.363	–	–
Total	70	75.71 ± 10.75	210	73.39 ± 10.01	−1.49	0.137

The bold value indicates a statistical difference between case and control groups at the significance level of 0.05.