Table 1 The patients’ demographic and clinical characteristics
Characteristics | Surgery (n = 92) | RFA (n = 46) | P value |
|---|---|---|---|
Sex | 1.000 | ||
 Male/female | 58/34 | 29/17 |  |
Age (years) | 58.0 (51.0–65.8) | 58.5 (50.8–67.0) | 0.492 |
Preoperative CEA (ng/mL) | 6.7 (2.9–22.3) | 5.4 (3.2–12.9) | 0.731 |
Location of primary cancer | 0.802 | ||
 Colon/rectum | 58/34 | 30/16 |  |
Timing of metastasis | 0.277 | ||
 Synchronous/metachronous | 70/22 | 31/15 |  |
T stage | 0.798 | ||
 T4/T1–3 | 30/62 | 16/30 |  |
N stage | 0.899 | ||
 N0/N+ | 31/61 | 16/30 |  |
Median diameter (mm) | 30.0 (18.5–35.8) | 22.5 (16.8–36.3) | 0.249 |
No. of tumors | 0.878 | ||
 1/2–3 | 75/17 | 37/9 |  |
Location of liver metastasis | 0.076 | ||
 Unilobar/bilobar | 73/19 | 42/4 |  |
Neoadjuvant chemotherapy | 0.220 | ||
 Yes/no | 34/58 | 22/24 |  |
Extrahepatic disease | 0.160 | ||
 Yes/no | 4/88 | 5/41 |  |
Comorbidities | 0.232 | ||
 Hypertension | 14 | 5 |  |
 Diabetes | 8 | 1 |  |
 Cardiac | 5 | 3 |  |
 Cerebrovascular | 5 | 2 |  |
 Pulmonary or others | 2 | 4 |  |