Table 2.
Characteristics of esophageal cancer cases and controls.
| Variables | Case N (%) N = 381 |
Control N (%) N = 432 |
χ 2 | P |
|---|---|---|---|---|
| Age | ||||
| ≤65 | 237 (62.2) | 286 (66.2) | 1.41 | 0.23 |
| >65 | 144 (37.8) | 146 (33.8) | ||
| Gender | ||||
| Male | 256 (67.2) | 278 (64.4) | 0.72 | 0.40 |
| Female | 125 (32.8) | 154 (35.6) | ||
| Smoking* | ||||
| Nonsmokers | 189 (59.6) | 264 (61.1) | 0.17 | 0.68 |
| Smokers | 128 (40.4) | 168 (38.9) | ||
| Drinking* | ||||
| Nondrinkers | 255 (80.7) | 353 (81.9) | 0.18 | 0.68 |
| Drinkers | 61 (19.3) | 78 (18.1) | ||
| Family history of cancer* | ||||
| No | 233 (75.6) | 357 (85.2) | 10.60 | 0.001 |
| Yes | 75 (24.4) | 62 (14.8) |
*because of the failure data collection, the number of cases and controls for some factors was less than 381 or 432.