Table 1:
Cohort characteristics
| Variables | Population (N = 501) | VATS (N = 457) | Converted (N = 44) | P-value |
|---|---|---|---|---|
| Median age (years) | 65 | 65 | 67 | 0.06 |
| Sex | 0.80 | |||
| Men | 287 | 261 | 26 | |
| Women | 214 | 196 | 18 | |
| Type of resection | 1.00 | |||
| Lobectomy | 456 | 414 | 42 | |
| Segmentectomy | 36 | 34 | 2 | |
| Bilobectomy | 9 | 9 | 0 | |
| Smoker (current or former) | 330 | 302 | 28 | 0.11 |
| Obesity | 78 | 72 | 28 | 0.71 |
| Pulmonary history | ||||
| COPD | 90 | 82 | 8 | 0.99 |
| Overlap syndrome | 11 | 11 | 0 | 0.29 |
| Sleep apnoea | 7 | 3 | 4 | 0.02 |
| Pulmonary embolism | 9 | 9 | 0 | 0.35 |
| Asthma | 5 | 5 | 0 | 0.49 |
| FEV1 (% of predicted value) | 86.4 (IQR 71.5–101) | 86 (IQR 56.7–115.2) | 81 (IQR 51–111) | 0.129 |
| Tumour (T) | 0.72 | |||
| T1/T2 | 316 | 286 | 30 | |
| T3/T4 | 63 | 57 | 6 | |
| Nodal status (N) | 0.91 | |||
| N0 | 311 | 288 | 23 | |
| N1/N2 | 68 | 62 | 6 |
COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in 1 s; IQR: interquartile range; VATS: video-assisted thoracic surgery.