Vitamin D receptor genetic polymorphisms are associated with oral lichen planus susceptibility in a Chinese Han population

Table 4 Stratified analyses on combined variant alleles (rs2239185 and rs7975232) and OLP risk

Variables	OLP risk (0 vs.1–2)		OR (95%CI)	P ^a	P ^b
Variables	OLP	Control	OR (95%CI)	P ^a	P ^b
Age, year
≥ 45	50/11	75/11	1.69 (0.60–4.71)	0.318	0.457
< 45	95/21	133/8	3.13 (1.28–7.65)	0.012
Gender
Male	40/9	58/16	0.61 (0.21–1.72)	0.347	0.267
Female	105/23	130/3	10.11 (2.82–36.30)	< 0.001
Alcohol
Heavy	8/3	1/1	–	–	–
Non Heavy	137/29	187/18	2.42 (1.25–4.67)	0.008
Oral hygiene
Good	109/22	103/16	1.59 (0.75–3.37)	0.231	0.453
Poor	36/10	85/3	6.47 (1.56–26.90)	0.010

Logistic regression was used in the implicit model to determine the adjusted P ^a value according to age, gender, alcohol consumption and oral hygiene, heterogeneity was used to test
P ^b-value
Abbreviation: OLP oral lichen planus, OR odds ratio, CI confident interval

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