Table 1 Baseline characteristics of patients with Colon cancer undergoing resection in the training and validation cohorts (n = 322)
|  |  | Training cohort(n = 226) | Validation cohort(n = 96) | P-Value‡ |
|---|---|---|---|---|
Gender | Â | Â | Â | 0.300 |
| Â | Male | 156(69.0) | 60(62.5) | Â |
| Â | Female | 70(31.0) | 36(37.5) | Â |
Age | Â | Â | Â | 0.055 |
|  | < 60 y | 142(62.8) | 71(74.0) |  |
|  | ≥ 60 y | 84(6.0) | 25(26.0) |  |
BMI | Â | Â | Â | 0.426 |
|  | < 25 kg/m2 | 184(81.4) | 82(85.4) |  |
|  | ≥ 25 kg/m2 | 42(18.6) | 14(14.6) |  |
ASA | Â | Â | Â | 0.122 |
| Â | I | 15(6.6) | 12(12.5) | Â |
| Â | II | 211(93.4) | 84(87.5) | Â |
Preoperative chemotherapy | Â | Â | Â | 1.000 |
| Â | No | 180(79.6) | 76(79.2) | Â |
| Â | Yes | 46(20.4) | 20(20.8) | Â |
Preoperative radiotherapy | Â | Â | Â | 0.584 |
| Â | No | 199(88.1) | 82(85.4) | Â |
| Â | Yes | 27(11.9) | 14(14.6) | Â |
Operation time | Â | Â | Â | 0.440 |
|  | < 180 min | 72(31.9) | 35(36.5) |  |
|  | ≥ 180 min | 154(68.1) | 61(63.5) |  |
Pre-albumin | Â | Â | Â | 0.171 |
|  | < 25 g/L | 84(37.2) | 44(45.8) |  |
|  | ≥ 25 g/L | 142(62.8) | 52(54.2) |  |
Tumor size | cm | 3.2(2.5–7.5) | 3.5(2.4-8.0) | 0.795 |
T stage | Â | Â | Â | 0.105 |
| Â | T1 | 12(5.2) | 8(8.3) | Â |
| Â | T2 | 21(9.3) | 17(17.7) | Â |
| Â | T3 | 184(81.4) | 68(70.8) | Â |
| Â | T4 | 9(4.0) | 3(3.1) | Â |
N stage | Â | Â | Â | 0.434 |
| Â | N0 | 119(52.7) | 43(44.8) | Â |
| Â | N1 | 59(26.1) | 29(30.2) | Â |
| Â | N2 | 48(21.2) | 24(25.0) | Â |
lymphadenectomy | Â | Â | Â | 0.662 |
| Â | D2 | 158(69.9) | 68(70.8) | Â |
| Â | D3 | 50(22.1) | 23(24.0) | Â |
| Â | CME | 18(8.0) | 5(5.2) | Â |
Surgical approach | Â | Â | Â | 0.351 |
| Â | Laparoscopy | 219(96.9) | 91(94.8) | Â |
| Â | Open | 7(3.1) | 5(5.2) | Â |
Anastomotic technique | Â | Â | Â | 0.882 |
| Â | Intracorporeal | 179(79.2) | 75(78.1) | Â |
| Â | Extracorporeal | 47(20.8) | 21(21.9) | Â |
Sutures used at closure | Â | Â | Â | 0.701 |
| Â | PDS-plus | 150(66.4) | 61(63.5) | Â |
| Â | No-PDS | 76(33.6) | 35(36.5) | Â |
Infection | Â | Â | Â | 0.724 |
| Â | No | 216(95.6) | 92(95.8) | Â |
| Â | Yes | 10(4.4) | 4(4.2) | Â |
Diabetes | Â | Â | Â | 0.901 |
| Â | No | 199(88.1) | 85(88.5) | Â |
| Â | Yes | 27(11.9) | 11(11.5) | Â |
Immunodeficiencies | Â | Â | Â | 1.000 |
| Â | No | 216(95.6) | 92(95.8) | Â |
| Â | Yes | 10(4.4) | 4(4.2) | Â |