Table 2. Adjusted odds ratios (AORs) and 95% confidence intervals (CIs) of oral cancer associated with histamine receptor H1 (HRH1) genotypic frequencies.

Variable	Controls (N=1189) (%)	Patients (N=1184) (%)	AOR (95% CI)	p
rs346074
CC	502 (42.2%)	501 (42.3%)	1.000 (reference)
CT	535 (45.0%)	536 (45.3%)	1.061 (0.858~1.313)	0.584
TT	152 (12.8%)	147 (12.4%)	0.959 (0.695~1.322)	0.797
CT+TT	687 (57.8%)	683 (57.7%)	1.038 (0.849~1.270)	0.716
rs346076
TT	471 (39.6%)	470 (39.7%)	1.000 (reference)
TC	561 (47.2%)	555 (46.9%)	1.043 (0.842~1.293)	0.698
CC	157 (13.2%)	159 (13.4%)	0.936 (0.682~1.284)	0.680
TC+CC	718 (60.4%)	714 (60.3%)	1.019 (0.831~1.249)	0.858
rs901865
CC	1038 (87.3%)	1018 (86.0%)	1.000 (reference)
CT	146 (12.3%)	156 (13.2%)	1.340 (0.996~1.804)	0.053
TT	5 (0.4%)	10 (0.8%)	1.242 (0.324~4.761)	0.752
CT+TT	151 (12.7%)	166 (14.0%)	1.336 (0.998~1.789)	0.051
rs2606731
CC	582 (49.0%)	592 (50.0%)	1.000 (reference)
CA	503 (42.3%)	489 (41.3%)	0.963 (0.781~1.186)	0.721
AA	104 (8.7%)	103 (8.7%)	0.817 (0.565~1.179)	0.280
CA+AA	607 (51.0%)	592 (50.0%)	0.936 (0.767~1.142)	0.514

AORs with their 95% CIs were estimated by logistic regression models.