Table 1.
Preoperative and operative characteristics of 303 patients undergoing liver resection for colorectal liver metastases
| Value | ||
|---|---|---|
| Age, years, median (range) | 67 (33–90) | |
| Gender, n (%) | Female | 113 (37.3%) |
| Male | 190 (62.7%) | |
| T stage of primary, n (%) | 0 | 3 (< 1%) |
| 1 | 7 (2.3%) | |
| 2 | 19 (6.3%) | |
| 3 | 174 (57.4%) | |
| 4 | 91 (30.0%) | |
| Unavailable | 9 (3.0%) | |
| N stage of primary, n (%) | 0 | 133 (43.9%) |
| 1 | 101 (33.3%) | |
| 2 | 64 (21.1%) | |
| Unavailable | 5 (1.7%) | |
| Site of primary, n (%) | Colonic | 152 (50.2%) |
| Rectal | 151 (49.8%) | |
| Timing, n (%) | Synchronous | 144 (47.5%) |
| Metachronous | 159 (52.5%) | |
| Preoperative MRI, n (%) | Yes | 166 (54.8%) |
| No | 137 (45.2%) | |
| Preoperative PET, n (%) | Yes | 208 (68.6%) |
| No | 95 (31.4%) | |
| Preoperative liver-directed chemotherapy, n (%) | Yes | 151 (49.8%) |
| No | 152 (50.2%) | |
| Preoperative diabetes, n (%) | Yes | 28 (9.2%) |
| No | 275 (90.8%) | |
| BMI, kg/m2, median (range) | 27 (16–54) | |
| ASA class, n (%) | 1 | 24 (7.9%) |
| 2 | 211 (69.6%) | |
| 3 | 68 (22.4%) | |
| Neutrophil : lymphocyte ratio, median (range) | 2.58 (0.50–17.25) | |
| Preoperative albumin, g/dl, median (range) | 44 (26–52) | |
| POSSUM physiological score, median (range) | 16 (12–32) | |
| Operation, n (%) | Right hemihepatectomy | 129 (42.6%) |
| Extended right | 13 (4.3%) | |
| Left hemihepatectomy | 35 (11.6%) | |
| Extended left | 3 (1.0%) | |
| Left lateral sectorectomy | 31 (10.2%) | |
| Wedge resection | 79 (26.1%) | |
| Other | 13 (4.3%) | |
| RFA included, n (%) | Yes | 19 (6.3%) |
| No | 284 (93.7%) | |
| Wedge resection included, n (%) | Yes | 122 (40.3%) |
| No | 181 (59.7%) | |
| Number of segments resected, median (range) | 4 (1–6) | |
| Repeat operation, n (%) | Yes | 33 (10.9%) |
| No | 270 (89.1%) | |
| Curative resection, n (%) | Yes | 284 (93.7%) |
| No | 19 (6.3%) | |
| Number of tumours, median (range) | 1 (1–10) | |
| Maximum tumour diameter, mm, median (range) | 35 (3–155) | |
| Resection margin, n (%) | R0 | 232 (76.6%) |
| R1 | 71 (23.4%) | |
MRI, magnetic resonance imaging;
PET, positron emission tomography;
BMI, body mass index;
ASA, American Society of Anesthesiologists;
RFA, radiofrequency ablation.