Table 1.
Comparison of baseline data between the two groups (n = 122).
| Item | Observation group (n = 61) | Control group (n = 61) | t/χ 2 /Fisher exact probability value | P value |
|---|---|---|---|---|
| Gender (n (%)) | ||||
| Male | 44 (72.13) | 38 (62.30) | 1.399 | 0.247 |
| Female | 17 (27.87) | 23 (37.70) | ||
| Age (years) | 57.13 ± 5.86 | 57.51 ± 6.27 | 0.343 | 0.732 |
| BMI | 23.45 ± 2.32 | 23.59 ± 2.22 | 0.341 | 0.734 |
| Site of the primary lesion (cases (%)) | ||||
| Left colon | 25 (40.98) | 28 (45.90) | 0.532 | 0.766 |
| Right colon | 6 (9.84) | 7 (11.48) | ||
| Rectum | 30 (49.18) | 26 (42.62) | ||
| Differentiation degree | ||||
| Well differentiated | 59 (96.72) | 55 (90.16) | 0.272 | - |
| Poorly differentiated | 2 (3.28) | 6 (9.84) | ||
| Maximum diameter of primary tumor (cm) | 3.97 ± 1.44 | 4.05 ± 1.74 | 0.284 | 0.777 |
| ASA score (cases (%)) | ||||
| I~II | 49 (80.33) | 44 (72.13) | 1.131 | 0.288 |
| III | 12 (19.67) | 17 (27.87) | ||
| Lymph node metastasis of the primary lesion (cases (%)) | ||||
| Negative | 21 (34.43) | 17 (27.87) | 0.612 | 0.434 |
| Positive | 40 (65.57) | 44 (72.13) | ||
| Depth of primary tumor invasion (cases (%)) | ||||
| T1/T2 | 3 (4.92) | 5 (8.20) | 0.717 | - |
| T3/T4 | 58 (95.08) | 56 (91.80) | ||
| Number of liver metastases (number) | 2.10 ± 0.98 | 2.00 ± 1.20 | 0.497 | 0.620 |
| Maximum diameter of liver metastases (cm) | 2.91 ± 1.43 | 2.70 ± 1.35 | 0.829 | 0.409 |
| Preoperative chemotherapy (cases (%)) | ||||
| None | 38 (62.30) | 40 (65.57) | 0.142 | 0.706 |
| Yes | 23 (37.70) | 21 (34.43) | ||
| Postoperative chemotherapy (cases (%)) | ||||
| FOLFOX | 36 (59.02) | 40 (65.57) | 0.772 | - |
| XELOX | 20 (32.79) | 17 (27.87) | ||
| Others | 5 (8.20) | 4 (6.56) | ||
| Preoperative CEA (cases (%)) | ||||
| ≤5 μg/l | 18 (29.51) | 21 (34.43) | 0.339 | 0.560 |
| >5 μg/l | 43 (70.49) | 40 (65.57) | ||
| Distribution of liver metastases (cases (%)) | ||||
| Single lobe | 40 (65.57) | 37 (60.66) | 0.317 | 0.573 |
| Double lobes | 21 (34.43) | 24 (39.34) |