Table 1. Characteristics of study subjects.
| Cases (N=25) | Controls (N=31) | Total (N=56) | |
|---|---|---|---|
| Age (median, range) | 54 (31–73) | 51 (36–82) | 53 (31–82) |
| Sex | |||
| Male | 19 | 14 | 33 |
| Female | 6 | 17 | 23 |
| Race | |||
| White | 22 | 30 | 52 |
| Black | 3 | 0 | 3 |
| Other | 0 | 1 | 1 |
| Tobacco use | |||
| Never | 3 | 10 | 13 |
| Former | 6 | 11 | 17 |
| Current | 16 | 10 | 26 |
| Alcohol abuse a | |||
| Yes | 4 | 2 | 6 |
| No | 21 | 29 | 50 |
| Tumour site | |||
| Oral cavity | 10 | N/A | N/A |
| Oropharynx | 4 | ||
| Larynx | 10 | ||
| Hypopharynx | 1 | ||
| Treatment modalities | |||
| Radiation therapy only | 5 | N/A | N/A |
| Chemotherapy only | 1 | ||
| Radiation and chemotherapy | 9 | ||
| Surgery only | 10 | ||
a
Defined as more than three glasses per day.