Table 2 Comparison of demographics and comorbidities of patients with lung cancers receiving surgical resection by VATS and thoracotomy
|  | VATS N = 1404 |  | Thoracotomy N = 6145 |  | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
IS N = 745 (53.1%) | Non-IS N = 659 (46.9%) |  | IS N = 4205 (68.4%) | Non-IS N = 1940 (31.6%) | ||||||
| Â | n | % | n | % | p-value | n | % | n | % | p-value |
Sex | Â | Â | Â | Â | 0.44 | Â | Â | Â | Â | 0.35 |
 Female | 384 | 51.5 | 326 | 49.5 |  | 1599 | 38.0 | 762 | 39.3 |  |
 Male | 361 | 48.5 | 333 | 50.5 |  | 2606 | 62.0 | 1178 | 60.7 |  |
Mean age, year (SD) | 63.1 | (11.7) | 62.3 | (11.7) | 0.16 | 63.2 | (11.1) | 63.4 | (11.3) | 0.63 |
 < 55 | 207 | 27.8 | 167 | 25.3 | 0.52 | 999 | 23.8 | 461 | 23.8 | 0.96 |
 55–64 | 206 | 27.7 | 181 | 27.5 |  | 1147 | 27.3 | 517 | 26.7 |  |
 65–74 | 235 | 31.5 | 209 | 31.7 |  | 1462 | 34.8 | 681 | 35.1 |  |
 75+ | 97 | 13.0 | 102 | 15.5 |  | 597 | 14.2 | 281 | 14.5 |  |
Comorbidity | ||||||||||
 COPD | 389 | 52.2 | 365 | 55.4 | 0.23 | 2435 | 57.9 | 1151 | 59.3 | 0.29 |
 Asthma | 136 | 18.3 | 102 | 15.5 | 0.17 | 604 | 14.4 | 318 | 16.4 | 0.04 |
 Other cancer | 96 | 12.9 | 79 | 12.0 | 0.61 | 313 | 7.44 | 148 | 7.63 | 0.80 |
 Heart failure | 45 | 6.04 | 40 | 6.04 | 0.98 | 166 | 3.95 | 83 | 4.28 | 0.54 |
 Neoadjuvant | 453 | 60.8 | 386 | 58.6 | 0.39 | 2896 | 68.9 | 1269 | 65.4 | 0.007 |
 Procedure method |  |  |  |  | 0.58 |  |  |  |  | 0.66 |
 Pneumonectomy | 5 | 0.67 | 2 | 0.30 |  | 3 | 0.07 | 1 | 0.05 |  |
 Lobectomy | 428 | 57.5 | 388 | 58.9 |  | 4199 | 99.9 | 1936 | 99.8 |  |
 Limited resection | 312 | 41.9 | 269 | 40.8 |  | 3 | 0.07 | 3 | 0.15 |  |