Table 1. Characteristics of patients and controls.
| CasesA* (%) | CasesB* (%) | Total Cases (%) | Controls (%) | |
|---|---|---|---|---|
| Total number | N = 65 | N = 51 | N = 116 | N = 102 |
| Mean age, years | 40.4 | 41.5 | 40.8 | 39.9 |
| Age | ||||
| ≤40 | 38.5 | 35.3 | 37.1 | 43.1 |
| >40 and <50 | 61.5 | 64.7 | 62.9 | 56.9 |
| Sex | ||||
| Male | 64.6 | 60.8 | 62.9 | 57.8 |
| Female | 35.4 | 39.2 | 37.1 | 42.2 |
| Location | ||||
| Cardia | 18.5 | 31.4 | 24.1 | — |
| Noncardia | 80.0 | 68.6 | 75.0 | — |
| Unknown | 1.5 | — | 0.9 | — |
| Pathology | ||||
| Intestinal type | 20.0 | 31.4 | 25.0 | — |
| Diffuse type | 40.0 | 51.0 | 44.8 | — |
| Mixed type | 13.9 | 15.7 | 14.7 | — |
| Unknown | 26.1 | 1.9 | 15.5 | — |
*
CasesA were patients with a cancer history in lineal kin (genetic background); casesB were patients without a cancer history in lineal kin.