Characteristics | The number of pulmonary metastases | p valuea | |||
---|---|---|---|---|---|
All patients | Group I | Group II | Group III | ||
N = 615 | N = 414 | N = 159 | N = 42 | ||
No. of lungs resectedb, mean ± sd | 1.92 ± 1.77 | 1.17 ± 0.46 | 2.64 ± 1.08 | 6.52 ± 3.31 | <0.001 |
No. of lung metastasesc, mean ± sd | 1.66 ± 1.44 | 1.0 | 2.28 ± 0.45 | 5.79 ± 2.62 | <0.001 |
Difference between no. of lungs resected and no. of metastasesd, mean ± sd | 0.25 ± 0.70 | 0.17 ± 0.46 | 0.33 ± 0.83 | 0.74 ± 145 | <0.001 |
Maximum tumor size, mean ± sd | 1.68 ± 1.23 | 1.64 ± 1.20 | 1.80 ± 1.34 | 1.67 ± 0.95 | 0.253 |
Bilaterality, n (%) | 90 (14.6) | 0 | 63 (39.6) | 27 (64.3) | <0.001 |
Lymph node metastasis, n (%)e | 0.614 | ||||
No lymph node dissection | 439 (71.4) | 303 (73.2) | 108 (67.9) | 28 (66.7) | |
Lymph node dissection | 176 (28.6) | 111 (26.8) | 51 (32.1) | 14 (33.3) | |
LN (−) | 152 (24.7) | 95 | 44 | 13 | |
LN (+) | 24 (3.9) | 16 | 7 | 1 | |
Extent of resection, n (%) | 0.442 | ||||
Precision excision | 20 (3.3) | 17 | 3 | 0 | |
Wedge resection | 439 (71.4) | 300 | 111 | 28 | |
Segmentectomy | 41 (6.7) | 24 | 15 | 2 | |
Lobectomy | 109 (17.7) | 71 | 26 | 12 | |
Bilobectomy/pneumonectomy | 6 (0.9) | 2 | 4 | 0 | |
Surgical approach | <0.001 | ||||
Thoracotomy/sternotomy | 244 (39.7) | 118 (28.5) | 93 (58.5) | 33 (78.6) | |
VATS | 371 (60.3) | 296 (71.5) | 66 (41.5) | 9 (21.4) |