Table 1. Frequency distribution of demographic characteristics of gastric cancer cases and cancer-free controls in an eastern Chinese population.
| Variables | Cases N (%) | Controls N (%) | Pa |
|---|---|---|---|
| All subjects | 1,125 | 1,221 | |
| Age, year | 0.492 | ||
| Range | 21-86 | 22-89 | |
| Meanb | 58.60 ± 11.36 | 58.93 ± 12.05 | |
| ≤ 50 | 234 (20.8) | 273 (22.4) | |
| 51-60 | 383 (34.1) | 387 (31.7) | |
| 61-70 | 339 (30.1) | 379 (31.0) | |
| > 70 | 169 (15.0) | 182 (14.9) | |
| Sex | 0.314 | ||
| Female | 325 (28.9) | 376 (30.2) | |
| Male | 800 (71.1) | 845 (69.8) | |
| Smoking status | < 0.001 | ||
| Never | 686 (61.0) | 622 (50.9) | |
| Ever | 439 (39.0) | 599 (49.1) | |
| Drinking status | 0.008 | ||
| Never | 859 (76.4) | 873 (71.5) | |
| Ever | 266 (23.6) | 348 (28.5) | |
| Tumor sitec | |||
| GCA | 305 (27.1) | ||
| GNCA | 820 (72.9) |
a
Two-sided χ2 test for distributions between cases and controls
b
Data are presented as mean ± SD
c
GCA: gastric cardia adenocarcinoma, GNCA, gastric non-cardia adenocarcinoma.