Comparison of clinicopathologic factors between the ER and LR groups.
| Factors | ER n = 78 (%) | LR n = 12 (%) | P |
|---|---|---|---|
| Sex | |||
| Male | 60 (66.7) | 7 (7.8) | 0.17 |
| Female | 18 (20.0) | 5 (5.6) | |
| Age (years) | |||
| ≤ 40 | 10 (11.1) | 3 (3.3) | 0.54 |
| 40-60 | 27 (30.0) | 3 (3.3) | |
| ≥ 60 | 41 (45.6) | 6 (6.7) | |
| Site of primary tumor | |||
| Proximal colon | 15 (16.7) | 3 (3.3) | 0.45 |
| Distal colon | 19 (21.1) | 1 (1.1) | |
| Rectum | 44 (48.9) | 8 (8.9) | |
| Tumor size (max) (cm) | |||
| ≤ 5 | 52 (57.8) | 5 (5.6) | 0.09 |
| > 5 | 26 (28.9) | 7 (7.8) | |
| Differentiation degree | |||
| Well-differentiated | 52 (57.8) | 6 (6.7) | 0.26 |
| Poorly differentiated | 26 (28.9) | 6 (6.7) | |
| pT | |||
| pT1 + pT2 | 8 (8.9) | 4 (4.4) | 0.029 |
| pT3+ pT4 | 70 (77.8) | 8 (8.9) | |
| pN | |||
| pN0 | 23 (25.6) | 7 (7.8) | 0.048 |
| pN1+pN2 | 55 (61.1) | 5 (5.6) | |
| Macroscopic types | |||
| Protrude type | 10 (11.1) | 6 (6.7) | 0.008 |
| Ulcerative type | 55 (61.1) | 4 (4.4) | |
| Ulcer-protrude type | 7 (7.8) | 2 (2.2) | |
| Infiltrating type | 6 (6.7) | 0 (0) | |
| Vascular cancer embolus | |||
| Found | 6 (6.7) | 1 (1.1) | 0.93 |
| Not found | 72 (86.7) | 11 (12.2) | |
| Preoperative S-CEA (ng/ml) | |||
| ≤ 5 | 36 (45.0) | 3 (3.8) | 0.32 |
| > 5 | 35 (43.8) | 6 (7.5) | |
| Postoperative adjuvant chemotherapy | |||
| Yes | 61 (68.5) | 7 (7.9) | 0.28 |
| No | 17 (19.1) | 4 (4.5) | |