Table 1.
Demographic and clinical characteristics of patients undergoing RATS (n = 167)
| Characteristic | No. (%) or median [IQR] |
|---|---|
| Age, yr | 66 [60–74] |
| Male sex | 77 (46.1) |
| Smoking status | |
| Smoker | 37 (22.2) |
| Former smoker | 75 (44.9) |
| Nonsmoker | 51 (30.5) |
| Unknown | 4 (2.4) |
| Previous cancer | 47 (28.1) |
| Previous lung resection | 4 (2.4) |
| Tumour location | |
| Right upper lobe | 65 (38.9) |
| Right middle lobe | 19 (11.4) |
| Right lower lobe | 32 (19.2) |
| Left upper lobe | 27 (16.2) |
| Left lower lobe | 24 (14.4) |
| Tumour size, cm | 2.5 [1.5–3.2] |
| Resection type | |
| Lobectomy | 141 (84.4) |
| Segmental resection | 13 (7.8) |
| Nonanatomic (wedge) | 8 (4.8) |
| Bilobectomy | 5 (3.0) |
| T stage | |
| T1 | 86 (51.5) |
| T2 | 54 (32.3) |
| T3 | 7 (4.2) |
| T4 | 2 (1.2) |
| Benign | 10 (6.0) |
| Metastases to lung | 8 (4.8) |
| Cumulative stage | |
| Occult cancer | 2 (1) |
| 1A | 71 (43) |
| 1B | 40 (24) |
| 2A | 15 (9) |
| 2B | 6 (4) |
| 3A | 14 (8) |
| 4 | 7 (4) |
| Benign tumour | 10 (6) |
| FEV1, % predicted | 85 [71–94] |
| DLCO, % predicted | 80 [69–93] |
DLCO = diffusing capacity of the lungs for carbon monoxide; FEV1 = forced expiratory volume in 1 second; IQR = interquartile range; RATS = robotic-assisted thoracic surgery.