Table 1.
Basic characteristics of study objects
| Characteristics | Case (%) | Control (%) | p | |
|---|---|---|---|---|
| Number | 514 | 510 | ||
| Age | Mean ± SD (years) | 60.27 ± 11.81 | 60.13 ± 10.61 | 0.847 |
| Gender | Female | 228 (50.3) | 224 (49.4) | 0.839 |
| Male | 286 (50.0) | 286 (50.0) | ||
| Tumor stage | I–II | 146 (28.4) | ||
| III–V | 212 (41.2) | |||
| Missing | 156 (30.4) | |||
| LN metastasis | No | 188 (36.6) | ||
| Yes | 170 (33.1) | |||
| Missing | 156 (30.3) | |||
| Tumor type | Colon cancer | 217 (42.2) | ||
| Rectal cancer | 244 (47.5) | |||
| Other | 53 (10.3) | |||
p values were calculated by Student's t test for age and χ 2 test for gender.
p < 0.05 indicates statistical significance.
SD: standard deviation; LN: lymph node