Table 6.

Logistic regression model for “CYP1A1 polymorphisms present/absent” and “CYP1A1–2 polymorphisms present/absent”.

Variables	CYP1A1 Present/Absent			CYP1A1–2 Present/Absent
	Odds Ratio	95% Confidence Interval	p-Value	Odds Ratio	95% Confidence Interval	p-Value
Age (≤65/>65)	0.73	0.07–7.31	0.790	0.91	0.29–2.84	0.872
Smoking	0.91	0.86–0.97	0.554	0.56	0.11–3.05	0.505
Alcohol	0.57	0.07–4.23	0.584	0.33	0.11–0.98	0.046
Larynx/hypopharynx cancer	0.19	0.12–0.28	<0.001	0.18	0.02–1.45	0.108