Table 3.
Demographic characteristics in GC patients and controls.
| Variables | Cases (%) | Controls (%) | Test statistics | P b | OR (95% CI) |
|---|---|---|---|---|---|
| (n = 500) | (n = 500) | ||||
| Age (mean ± SD), year | 57.93 ± 11.88 | 57.27 ± 12.15 | t = 0.92 | 0.36a | |
| Gender | |||||
| Female | 124 (24.80) | 124 (24.80) | 1 | ||
| Male | 376 (75.20) | 376 (75.20) | χ 2 = 0.00 | 1.00 | 1.00 (0.75, 1.33) |
| Smoking status | |||||
| Never | 202 (40.40) | 255 (51.00) | 1 | ||
| Ever | 298 (59.60) | 245 (49.00) | χ 2 = 11.32 | <0.01 | 1.53 (1.20, 1.97) |
| Drinking status | |||||
| Never | 310 (62.00) | 325 (65.00) | 1 | ||
| Ever | 190 (38.00) | 175 (35.00) | χ 2 = 0.97 | 0.32 | 1.14 (0.88, 1.47) |
| Family history of GC | |||||
| No | 381 (76.20) | 444 (88.80) | 1 | ||
| Yes | 119 (23.80) | 56 (11.20) | χ 2 = 27.49 | <0.01 | 2.48 (1.75, 3.50) |
GC: gastric cancer; OR: odds ratio; CI: confidence interval; SD: standard deviation. aP value for Student's t-test. bP value for two-sided χ2 test.