Table 1.
Frequency Distribution of Demographic and Risk Factors in SCCHN Patients and Controls
| Characteristics | Controlsa (n=335)
|
Cases (n=380)
|
P value | ||
|---|---|---|---|---|---|
| No. | % | No. | % | ||
| Age (years) | 0.526 | ||||
| ≤ 40 | 27 | 8.1 | 32 | 8.4 | |
| 41 – 55 | 109 | 32.5 | 142 | 37.4 | |
| 56 – 70 | 157 | 46.9 | 159 | 41.8 | |
| > 70 | 42 | 12.5 | 47 | 12.4 | |
| Sex | 0.091 | ||||
| Male | 269 | 80.3 | 285 | 75.0 | |
| Female | 66 | 19.7 | 95 | 25.0 | |
| Tobacco smoking | 0.588 | ||||
| Ever | 239 | 71.3 | 278 | 73.2 | |
| Never | 96 | 28.7 | 102 | 26.8 | |
| Alcohol drinking | |||||
| Ever | 240 | 71.6 | 84 | 22.1 | 0.054 |
| Never | 95 | 28.4 | 296 | 77.9 | |
| HPV16 serostatus | |||||
| Positive | 42 | 12.5 | 103 | 27.1 | 0.000 |
| Negative | 293 | 87.5 | 277 | 72.9 | |
| Tumor site | |||||
| Oropharynx cancer | - | - | 187 | 49.2 | - |
| Non-Oropharynx cancer | - | - | 193 | 50.8 | - |
a
The controls were selected by frequency matching to the patients on the factors shown in this table.