Table 2.
Comparison of clinicopathological factors in the ECC-positive and ECC-negative groups
| ECC-positive group | ECC-negative group | p value | |
|---|---|---|---|
| (n = 20) | (n = 80) | ||
| Age | 67.3 ± 12.0 years old | 72.0 ± 9.6 years old | N.S |
| Gender | |||
| M | 8 | 43 | N.S |
| F | 12 | 37 | |
| Operation method | |||
| Laparoscopic surgery | 10 (50 %) | 51 (63.8 %) | N.S |
| Open surgery | 10 (50 %) | 29 (36.2 %) | |
| Tumor location | |||
| Cecum | 4 (20 %) | 13 (16.3 %) | N.S |
| Ascending colon | 9 (45 %) | 32 (40 %) | |
| Transverse colon | 4 (20 %) | 24 (30 %) | |
| Descending colon | 0 (0 %) | 2 (2.5 %) | |
| Sigmoid colon | 3 (15 %) | 9 (11.2 %) | |
| Depth of tumor invasion | |||
| pTis | 0 (0 %) | 8 (10 %) | 0.012 |
| pT1 | 0 (0 %) | 16 (20 %) | (Tis, T1 vs. T2–T4) |
| pT2 | 2 (10 %) | 5 (6.2 %) | |
| pT3 | 16 (80 %) | 31 (38.8 %) | |
| pT4 | 2 (10 %) | 20 (25 %) | |
| Tumor size (mean ± SE) | |||
| 58.6 ± 16.7 mm | 49.2 ± 32.6 mm | 0.0239 | |
| Lymph node metastasis | |||
| pN(−) | 13 | 48 | N.S |
| pN(+) | 7 | 32 | |
| Distant metastasis | |||
| pM0 | 1 | 12 | N.S |
| pM1 | 19 | 68 | |
| cStage | |||
| 0 | 0 | 7 | N.S |
| I | 2 | 18 | |
| II | 10 | 21 | |
| III | 7 | 21 | |
| IV | 1 | 13 | |
| Histopathological classification | |||
| Well | 8 | 38 | N.S |
| Moderately | 9 | 33 | |
| Poorly | 1 | 6 | |
| Others | 2 | 3 | |
| Margin from tumor (mean ± SE) | |||
| Oral side | 16.7 ± 2.5 cm | 14.6 ± 1.1 cm | N.S |
| Anal side | 12.3 ± 1.5 cm | 12.8 ± 1.0 cm | N.S |
| Preoperative bowel preparation | |||
| PEG | 8 (40 %) | 60 (75 %) | 0.003 |
| Others | 12 (60 %) | 20 (25 %) | |