Characteristics | Patients (n = 380) | Controlsa (n = 335) | P valueb | ||
---|---|---|---|---|---|
No. | % | No. | % | ||
Age (years) | Â | Â | Â | Â | 0.526 |
 <40 | 32 | 8.4 | 27 | 8.1 |  |
 41–55 | 142 | 37.4 | 109 | 32.5 |  |
 56–70 | 159 | 41.8 | 157 | 46.9 |  |
 >70 | 47 | 12.4 | 42 | 12.5 |  |
Sex | Â | Â | Â | Â | 0.100 |
 Male | 285 | 75.0 | 269 | 80.3 |  |
 Female | 95 | 25.0 | 66 | 19.7 |  |
 Ethnicity |  |  |  |  |  |
 Non-Hispanic white | 380 | 100.0 | 335 | 100.0 |  |
Tobacco smoking | Â | Â | Â | Â | 0.588 |
 Ever | 278 | 73.2 | 239 | 71.3 |  |
 Never | 102 | 26.8 | 96 | 28.7 |  |
Alcohol drinking | Â | Â | Â | Â | Â |
 Ever | 296 | 77.9 | 240 | 71.6 | 0.054 |
 Never | 84 | 22.1 | 95 | 28.4 |  |
Tumor site | Â | Â | Â | Â | Â |
 Oropharyngeal | 187 | 49.2 |  |  |  |
 Non-Oropharyngeal | 193 | 50.8 |  |  |  |