Table 4. Non-adjusted and adjusted EHRs.

Variable	Non-adjusted		Adjusted
	EHRa	95%CI	EHRa	95%CI
Gender
Male	1		1
Female	0.48	0.41–0.57	0.69	0.58–0.82
Age group
15–44	1		1
45–54	1.16	0.99–1.36	0.98	0.83–1.16
55–64	1.01	0.85–1.19	1.07	0.90–1.27
65–74	0.81	0.67–0.97	1.14	0.95–1.38
75+	0.62	0.50–0.77	1.41	1.13–1.76
Topography
Oral cavity			1
Lip	0.09	0.05–0.14	0.27	0.18–0.42
Oropharynx	1.44	1.29–1.60	1.15	1.03–1.29
Stage
I	1		1
II	1.00	1.84–4.11	1.77	1.20–2.61
III	1.09	4.73–9.58	3.85	2.69–5.51
IV	4.21	10.1–19.6	7.79	5.56–10.9
Typology of residence area
Predominantly urban	1		–	–
Intermediate	0.95	0.83–1.09	–	–
Predominantly rural	0.85	0.71–1.01	–	–
Period of diagnosis
2000–2004			1
2005–2009	0.99	0.89–1.09	0.82	0.74–0.91

^aEach EHR is adjusted for the remaining variables.