[Table/Fig-5]:

Interactive effects amongst VDR gene polymorphisms and significant demographic variables regarding chronic periodontitis.

Biological interactions	OR (95% CI)*	p-value†
rs7975232 (ApaI) Gender Age Smoking habit	1.30 (0.56 -3.06) 1.12 (1.07 - 1.17) 0.36 (0.12 - 1.07)	0.541 <0.001 0.070
rs1544410 (BsmI) Gender Age Smoking habit	1.37 (0.59 - 3.17) 1.12 (1.07 - 1.16) 0.39 (0.13 - 1.12)	0.460 <0.001 0.081
rs2228570 (FokI) Gender Age Smoking habit	1.40 (0.61 - 3.23) 1.11 (1.07 - 1.18) 0.39 (0.13 - 1.14)	0.429 <0.001 0.085
rs731236 (TaqI) Gender Age Smoking habit	1.39 (0.60 - 3.22) 1.11 (1.07 - 1.16) 0.38 (0.14 - 1.15)	0.436 <0.001 0.081

* Odds ratio (95% confidence interval)

† Wald test