Table 2.

Serum levels of vitamins (ppm) in case and control groups.

	Healthy	OLP patients			P value
		Erosive	Nonerosive	Total	(healthy vs. OLP patients)	(erosive vs. nonerosive)
Vitamin A	72.31 ± 8.57	55.51 ± 38.84	63.70 ± 43.86	55.13 ± 7.52	0.508	0.419
Vitamin B12	15.07 ± 1.25	18.42 ± 7.33	14.74 ± 11.22	16.00 ± 1.70	0.770	0.168
Vitamin C	12.39 ± 2.02	9.61 ± 3.65	9.50 ± 3.85	9.87 ± 0.77	0.203	0.850
Vitamin D3	46.99 ± 4.27	63.13 ± 29.76	41.49 ± 35.43	50.13 ± 6.47	0.802	0.930
Vitamin E	28.38 ± 2.75	19.44 ± 15.89	23.04 ± 14.31	20.70 ± 3.05	0.137	0.824

P values are calculated for mean of total OLP patients.