Table 3.

Hazard ratio by site

Variable*	Hazard Ratio	[95% Conf.	Interval]	P-Value
Oral cavity Cancers (N = 164; 74 deaths)
1–10 Exams (Relative to none)	0.53	0.28	1.00	0.05
10 + Exams (Relative to none)	0.40	0.17	0.93	0.03
Oropharynx Cancers (N = 327; 111 deaths)
1–10 Exams (Relative to none)	0.69	0.42	1.13	0.14
10 + Exams (Relative to none)	0.57	0.29	1.11	0.10
Larynx/Hypopharynx Cancers (N = 481; 201 deaths)
1–10 Exams (Relative to none)	0.64	0.44	0.94	0.02
10 + Exams (Relative to none)	0.82	0.51	1.31	0.41

^*Controlling for age, sex, race, income, education, insurance, tobacco and alcohol use, T-stage, N-stage, and M-stage