Table 1. Baseline characteristics of patients treated with resection or ablation before PSM.
| Characteristics | Resection (n = 250, %) | Ablation (n = 171, %) | P value |
|---|---|---|---|
| Age | |||
| Average | 55.68 ± 10.64 | 56.58 ± 13.15 | 0.385 |
| ≤60 | 161(64.4) | 103(60.2) | |
| >60 | 89(35.6) | 68(39.8) | |
| Gender | 0.285 | ||
| Male | 163(65.2) | 120(70.2) | |
| Female | 87(34.8) | 51(29.8) | |
| Comorbidity | 0.766 | ||
| No | 144(57.6) | 96(56.1) | |
| Yes | 106(42.4) | 75(43.9) | |
| Primary tumor side | 0.914 | ||
| Left-side colorectum | 197(78.8) | 134(78.4) | |
| Right-side colon | 53(21.2) | 37(21.6) | |
| TNM stage | |||
| T stage | 0.067 | ||
| 1–3 | 122(48.8) | 68(39.8) | |
| 4 | 128(51.2) | 103(60.2) | |
| N stage | 0.183 | ||
| 0 | 113(45.2) | 64(37.4) | |
| 1 | 96(38.4) | 69(40.4) | |
| 2 | 41(16.4) | 38(22.2) | |
| IVTTa | 0.734 | ||
| Positive | 89(35.6) | 51(29.8) | |
| Negative | 126(50.4) | 78(45.6) | |
| Differentiation (primary) | 0.446 | ||
| Poor | 58(23.2) | 35(20.5) | |
| Moderate | 181(72.4) | 124(72.5) | |
| Well | 11(4.4) | 12(7.0) | |
| Metastases diameter (cm) | 0.001 | ||
| ≤3 | 189(75.6) | 152(88.9) | |
| >3, ≤5 | 61(24.4) | 19(11.1) | |
| Metastases number | 0.561 | ||
| 1 | 126(50.4) | 88(51.5) | |
| 2 | 56(22.4) | 45(26.3) | |
| 3 | 33(13.2) | 16(9.3) | |
| 4–5 | 35(14.0) | 22(12.9) | |
| Metastases distribution | 0.921 | ||
| Unilobar | 137(54.8) | 95(55.6) | |
| Multilobar (>1 lobe) | 113(45.2) | 76(44.4) | |
| Preoperative chemotherapy | 0.855 | ||
| No | 84(33.6) | 56(32.7) | |
| Yes | 166(66.4) | 115(67.3) | |
| Postoperative chemotherapy | <0.001 | ||
| No | 22(8.8) | 42(24.6) | |
| Yes | 228(91.2) | 129(75.4) | |
| KRAS statusb | 0.391 | ||
| Wild type | 71(28.4) | 49(28.7) | |
| Mutation type | 42(16.8) | 22(12.9) | |
| CEA level (ng/ml) | 0.899 | ||
| ≤5 | 111(44.4) | 77(45.0) | |
| >5 | 139(55.6) | 94(55.0) | |
| Timing of metastasis (months) | 0.084 | ||
| Synchronous (<12) | 29(11.6) | 30(17.5) | |
| Metachronous (≥12) | 221(88.4) | 141(82.5) |
Notes.
a
Data of 344 patients were available.
b
Data of 184 patients were available.
- PSM
- Propensity score matching
- IVTT
- Intravascular tumor thrombus