Table II.
General characteristics of gastric cancer patients and unaffected controlsa.
| Characteristic | Cases (n=373) | Controls (n=402) | P-value |
|---|---|---|---|
| Age | 62.13±12.10 | 62.37±8.76 | <0.001b |
| Sex, n (%) | <0.001b | ||
| Total | 367 | 402 | |
| Male | 267 (72.8) | 175 (43.5) | |
| Female | 100 (27.2) | 227 (56.5) | |
| Smoking, n (%) | 0.012b | ||
| Total | 357 | 402 | |
| Neverc | 273 (76.5) | 274 (68.2) | |
| Everc | 84 (23.5) | 128 (31.8) | |
| Consumption of alcohol, n (%) | 0.099 | ||
| Total | 357 | 402 | |
| Neverc | 315 (88.2) | 338 (84.1) | |
| Everc | 42 (11.8) | 64 (15.9) | |
| Size of tumor foci (n=209), mean ± SD | 4.28±2.70 | ||
| Tumor sites, n (%) | |||
| Total | 303 | ||
| Non-cardia cancer | 230 (75.9) | ||
| Cardia cancer | 73 (24.1) | ||
| Organ metastasis, n (%) | 321 | ||
| Negative, M0 | 253 (78.8) | ||
| Positive, M1 | 68 (21.2) | ||
| Lymph-node metastasis, n (%) | |||
| Total | 340 | ||
| Negative (N0) | 158 (46.5) | ||
| Positive (N1-N3) | 182 (53.5) |
a
Certain patients were excluded from sex, smoking, the consumption of alcohol analysis, tumor sites analysis, organ metastasis and lymph-node metastasis analysis due to missing data (n=6, n=16, n=16, n=70, n=52 and n=33, respectively).
b
P<0.05.
c
Never means that patients never smoke or drink alcohol, and ever means that patients have smoked or consumed alcohol.