| Factors |
| Number of cases | P value | |||||
| 1 - 10 | 11 - 20 | 21 - 30 | 31 - 40 | 41 - 50 | 51 - 60 | |||
| Gender | Male:Female | 6:4 | 8:2 | 10:0 | 5:5 | 6:4 | 10:0 | 0.2824 |
| Age | (median) | 69.5 | 70.5 | 62.0 | 63.0 | 64.5 | 64.0 | 0.3057 |
| BMI | (Kg/m2) | 22.4 | 18.9 | 22.2 | 19.8 | 19.4 | 21.1 | 0.9922 |
| Location | Upper | 1 | 1 | 1 | 2 | 2 | 2 | 0.7747 |
|
| Middle | 6 | 8 | 5 | 6 | 4 | 7 | |
|
| Lower | 3 | 1 | 4 | 2 | 4 | 1 | |
| Convert to thoracotomy |
| 0 | 1 | 0 | 0 | 0 | 0 | 0.4056 |
| Operation time | (minutes) | 469 | 440 | 292 | 371 | 492 | 449 | 0.3707 |
| Blood loss | (ml) | 372 | 293 | 203 | 210 | 220 | 300 | 0.1291 |
| Dissected lymph nodes | (number) | 53 | 36 | 33 | 27 | 51 | 38 | 0.2322 |
| Blood transfusion |
| 2 | 1 | 2 | 1 | 2 | 3 | 0.8638 |
| Complications |
| 3 | 3 | 0 | 2 | 4 | 2 | 0.3899 |
| Mortality |
| 0 | 1 | 0 | 0 | 0 | 0 | 0.4056 |