Table 1.
Demographic characteristics of SCCHN cases and cancer-free controls
| Variables | Cases
|
Controls
|
P valuea |
|---|---|---|---|
| No. (%) | No. (%) | ||
| All subjects | 1,075 (100%) | 1,079 (100%) | |
| Age (years) | 0.559 | ||
| Mean | 57.1 ± 11.2 | 56.7 ± 11.0 | |
| ≤ 45 | 153 (14.2) | 170 (15.7) | |
| 46–60 | 525 (48.8) | 523 (48.5) | |
| >60 | 397 (36.9) | 386 (35.8) | |
| Sex | 0.451 | ||
| Male | 808 (75.2) | 826 (76.5) | |
| Female | 267 (24.8) | 253 (23.5) | |
| Smoking Status | <0.0001 | ||
| Never | 299 (27.8) | 526 (48.8) | |
| Former | 370 (34.4) | 396 (36.7) | |
| Current | 406 (37.8) | 157 (14.5) | |
| Alcohol use | <0.0001 | ||
| Never | 294 (27.3) | 468 (43.4) | |
| Former | 233 (21.7) | 175 (16.2) | |
| Current | 548 (51.0) | 436 (40.4) |
a
Two-sided Chi-square test.