Characteristics of patients, primary tumours, metastases and resections
| Characteristic | Group, no. (%) of patients* | p value | |
|---|---|---|---|
| Group A, n = 28 | Group B, n = 61 | ||
| Sex | 0.48 | ||
| Female | 10 (36) | 27 (44) | — |
| Male | 18 (64) | 34 (56) | — |
| Mean age, yr | 59.4 | 60.2 | 0.71 |
| Tumour differentiation | 0.026 | ||
| Well and moderately differentiated | 16 (57) | 49 (80) | — |
| Poorly differentiated | 12 (43) | 12 (20) | — |
| Primary site | 0.49 | ||
| Right colon | 6 (21) | 13 (21) | 1.00 |
| Left colon | 12 (43) | 34 (56) | 0.26 |
| Rectum | 10 (36) | 14 (23) | 0.49 |
| Liver resection extent | 0.09 | ||
| Major | 8 (28) | 29 (48) | — |
| Minor | 20 (72) | 32 (52) | — |
| Type of hepatectomy | 0.08 | ||
| Right lobe | 4 (14) | 13 (22) | 0.38 |
| Extended right | 0 | 2 (3) | 0.36 |
| Extended left | 4 (14) | 12 (20) | 0.50 |
| Trisegmentectomy | 1 (4) | 2 (3) | 0.81 |
| Bisegmentectomy | 2 (7) | 15 (24) | 0.05 |
| Segmentectomy | 6 (21) | 9 (15) | 0.48 |
| Nonanatomic resection | 11 (39) | 8 (13) | 0.006 |
| Metastases, mean (range) | — | ||
| Size, cm | 3.5 (1–7) | 4.1 (1.5–8) | 0.32 |
| No. | 2.9 (1–5) | 3.8 (1–7) | 0.037 |
| CEA level | 74.2 (8–750) | 87.3 (5–810) | 0.28 |
| TNM staging | |||
| T1/T2 | 4 (14) | 7 (11) | 0.69 |
| T3/T4 | 24 (86) | 54 (89) | — |
| N0 | 10 (36) | 14 (23) | 0.20 |
| N+ | 18 (64) | 47 (77) | — |
| Colorectal resection margin < 3 cm | 0 | 13 (21) | 0.010 |
| Complications | 4 (14) | 8 (13) | 0.90 |
CEA = carcinoembryonic antigen; TNM = tumour–node–metastasis.
↵* Unless otherwise indicated.