Table 1 Patient characteristics by the number of pulmonary metastases
Characteristics | The number of pulmonary metastases | p valuea | |||
|---|---|---|---|---|---|
All patients | Group I | Group II | Group III | ||
N = 615 | N = 414 | N = 159 | N = 42 | ||
Age, mean ± sd (years) | 58.7 ± 10.4 | 59.3 ± 10.6 | 57.5 ± 10.2 | 57.5 ± 9.2 | 0.109 |
Male, n (%) | 361 (58.7) | 256 (61.8) | 82 (51.6) | 23 (54.7) | 0.073 |
DFI, median (range), months | 20 (0–209) | 22 (0–209) | 19 (0–112) | 15 (0–108) | 0.084 |
Primary CRC location | 0.757 | ||||
Colon cancer, n (%) | 244 (39.7) | 189 (45.6) | 77 (48.4) | 18 (42.9) | |
Rectal cancer, n (%) | 371 (60.3) | 225 (54.4) | 82 (51.6) | 24 (57.1) | |
Preop chemotherapy, n (%) | 370 (54.9) | 241 (58.2) | 103 (64.8) | 26 (61.9) | 0.343 |
Adjuvant chemotherapy, n (%) | 461 (75.0) | 296 (71.5) | 130 (81.7) | 35 (83.3) | 0.014 |