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Table 1 Patient characteristics, intra- and postoperative outcome

From: Video-assisted pulmonary metastectomy is equivalent to thoracotomy regarding resection status and survival

  VATS (n = 63; 25.1%) Thoracotomy (n = 188; 74.9%) P-value
Age (mean ± SD) [years] 64.9 ± 11.9 60.4 ± 12.2 0.93
Male gender; n (%) 42 (66.7%) 124 (66%) 0.92
Metastasis
 - Solitary; n (%) 54 (85.7) 104 (55.3) < 0.001*
 - Multiple; n (%) 9 (14.3) 84 (44.7)
 - Synchronous; n (%) 6 (9.5) 15 (8) 0.70
 - Metachronous; n (%) 57 (90.5) 173 (92)
 - No extrapulmonary metastases; n (%) 41 (65.1) 130 (69.1) 0.08
 - Treated extrapulmonary metastases; n (%) 19 (30.2) 57 (30.3)
 - Extrapulmonary metastases without treatment; n (%) 2 (3.2) 0 (0)
 - Extrapulmonary metastases, unknown treatment; n (%) 1 (1.6) 1 (0.5)
Mean disease-free interval between primary tumor and pulmonary metastasis (metachronic metastases only) (mean ± SD) [month] 57.3 ± 72.2 47 ± 54.0 0.022*
Systematic lymph node dissection; n (%) 28 (44.4) 160 (85.1) < 0.001*
Lymph node sampling; n (%) 10 (15.9) 17 (9) 0.13
Lymph node status
 - pN0; n (%) 37 (58.7) 148 (78.7) < 0.001*
 - pN1; n (%) 0 (0) 5 (2.7)
 - pN2; n (%) 1 (1.6) 23 (12.2)
 - pN3; n (%) 0 (0) 1 (0.5)
 - cN0; n (%) 25 (39.7) 11 (5.9)
Postoperative stay (mean ± SD) [days] 6.7 ± 2.5 10.1 ± 4.9 < 0.001*
Required surgical revision; n (%) 0 (0) 9 (4.8) 0.08
In-hospital mortality; n (%) 0 (0) 1 (0.5) 0.56
  1. SD Standard definition, VATS Video-assisted thoracoscopic surgery
  2. *significance p < 0.05