FOK l Vitamin D Receptor Gene Polymorphism and Risk of Dental Caries: A Case-Control Study

Table 3

Comparison of the mean vitamin D levels in the caries-free and caries-active groups.

Vitamin D	N	Mean	Std. deviation	95% confidence interval for mean		value
				Lower bound	Upper bound
Controls	105	28.56	10.42	26.54	30.58	0.001	HS
Cases	272	20.85	11.20	19.51	22.18
Total	377	23.00	11.51	21.83	24.16

A value ≤0.05 was considered statistically significant. The symbol indicates Student’s t-test.