Table 1. Baseline patient characteristics and outcome data.
| Variable | Overall (N = 441) | |
|---|---|---|
| Sex | ||
| Male | 260 (59.0%) | |
| Female | 181 (41.0%) | |
| Age in years, median (min.–max.) | 64.9 (33–84) | |
| Location of the primary tumor | ||
| Right colon | 84 (19.0%) | |
| Left colon | 174 (39.5%) | |
| Rectum | 183 (41.5%) | |
| Presentation of liver metastases1 | ||
| Synchronous | 254 (57.6%) | |
| Metachronous | 187 (42.4%) | |
| Number of liver metastases, median (max.) | 1 (16) | |
| Size of the largest metastasis, median (max.) | 2.5 cm (15.0) | |
| Type of liver resection2: | ||
| Minor | 201 (45.6%) | |
| Major | 239 (54.2%) | |
| Missing | 1 | |
| Resection margins | ||
| R0 | 412 (93.6%) | |
| R1 | 19 (4.3%) | |
| R2 | 9 (2.0%) | |
| OS after liver resection, median (min.–max.) | 5.8 years (0.0–19.7) | |
| RFS after liver resection, median (min.–max.) | 1.7 years (0.04–19.3) | |
| Alive at the end of follow-up | 172 (39.0%) | |
| Alive without recurrence | 123 (27.9%) | |
| Recurrence or death | 318 (72.1%) | |
1 Diagnosed within 6 months after the operation of the primary tumor (synchronous) or later (metachronous).
2 1–2 (minor) or ≥3 (major) Couinaud segments resected.