Table 1.
Distribution of descriptive characteristics for the study population.
| Characteristic | Cases (n = 1,046) | Controls (n = 1,239) | p-value |
|---|---|---|---|
| Age, mean ( ± SD) | 59.74 ± 11.30 | 60.88 ± 11.10 | 0.02 |
| Gender, n (%) | 0.82 | ||
| Female | 289 (27.63) | 337 (27.20) | |
| Male | 757 (72.37) | 902 (72.80) | |
| Race, n (%) | 0.72 | ||
| White | 948 (91.33) | 1,119 (90.90) | |
| Other | 90 (8.67) | 112 (9.10) | |
| Education, n (%) | <0.001 | ||
| Lower than high school | 131 (12.55) | 84 (6.82) | |
| High school or equivalence | 405 (38.79) | 413 (33.55) | |
| College or higher | 508 (48.66) | 734 (59.63) | |
| Family history of cancer, n (%) | 0.27 | ||
| No | 587 (56.12) | 724 (58.43) | |
| Yes | 459 (43.88) | 515 (41.57) | |
| Ever cigarette smoker, n (%) | <0.001 | ||
| No | 250 (23.90) | 496 (40.03) | |
| Yes | 796 (76.10) | 743 (59.97) | |
| Average pack-years of cigarette smoking, mean (± SD) | 29.93 ± 31.88 | 18.74 ± 26.46 | <0.001 |
| Average alcohol drinks per week, mean (± SD) | 24.03 ± 35.82 | 12.18 ± 20.23 | <0.001 |
| Tumor sites, n (%) | |||
| Oral | 392 (37.98) | ||
| Pharynx | 471 (45.64) | ||
| Larynx | 169 (16.38) | ||
Abbreviation: SD, standard deviation