Table 1.
Baseline clinicopathological characteristics.
| Variable | More number group (n = 40) | Equal number group (n = 45) | P value |
|---|---|---|---|
| Age, years | 53 (48, 63) | 55 (47, 63) | 0.905 |
| Male (%) | 31 (77.5) | 28 (62.2) | 0.127 |
| CRC characteristics | |||
| Rectum cancer (%) | 11 (27.5) | 12 (26.7) | 0.931 |
| T3/T4 stage (%) | 38 (100) | 38 (92.7) | 0.089 |
| N1/N2 stage (%) | 31 (81.6) | 17 (50.0) | 0.005∗ |
| TNM III/IV stage (%) | 40 (100.0) | 41 (91.1) | 0.053 |
| Resection with CRLM (%) | 19 (47.5) | 16 (35.6) | 0.264 |
| CRLM characteristics | |||
| Preoperative chemotherapy (%) | 37 (92.5) | 45 (100) | 0.061 |
| Synchronous metastases (%) | 36 (90.0) | 31 (68.9) | 0.017∗ |
| CEA>200 μg/L (%) | 1 (2.6) | 3 (6.7) | 0.392 |
| CA19-9 > 35 kU/L (%) | 10 (25.6) | 13 (28.9) | 0.739 |
| Tumor number in image | 5 (2, 8) | 5 (3, 8) | 0.700 |
| Tumor number in surgery | 9 (5, 15) | 5 (3, 8) | 0.001∗ |
| Tumor number in image >5 (%) | 19 (47.5) | 20 (44.4) | 0.778 |
| Tumor number in surgery >5 (%) | 29 (72.5) | 17 (37.8) | 0.001∗ |
| Tumor size, median (IQR) | 1.7 (1-3.2) | 2.5 (1.5-4) | 0.085 |
| R0 resection (%) | 36 (90.0) | 43 (95.6) | 0.318 |
| CRS score 3-5 (%) | 25 (62.5) | 15 (33.3) | 0.007∗ |
Continuous variables are reported as the median and interquartile range. ∗P < 0.05. CRC = colorectal cancer; T stage = tumor stage; N stage = node stage; TNM stage = tumor node metastasis stage; CRLM = colorectal liver metastases; CEA = carcinoembryonic antigen; CA19-9 = carbohydrate antigen 19-9; IQR = interquartile range; R0 resection = hepatectomy on patients with clear histological margins; CRS = clinical risk score.