Table 4.
Demographic and clinical characteristics of patients undergoing RATS (n = 167), by tertile
| Characteristic | Tertile; median [range] or no. (%) | p value | ||
|---|---|---|---|---|
| Tertile 1 | Tertile 2 | Tertile 3 | ||
| Age, yr | 66.5 [44–86] | 67.0 [29–88] | 67.5 [27–85] | 0.92 |
| Male sex | 34 of 60 (57) | 16 of 47 (34) | 21 of 50 (42) | 0.06 |
| T stage | 0.030 | |||
| T0/TX | 2 (3.4) | 1 (2.1) | 0 (0) | |
| T1 | 41 (68.3) | 23 (48.9) | 27 (54.0) | |
| T2 | 16 (26.7) | 20 (42.6) | 18 (36.0) | |
| T3 | 0 (0) | 2 (4.3) | 5 (10.0) | |
| T4 | 1 (1.7) | 1 (2.1) | 0 (0) | |
| N stage | 0.42 | |||
| NX | 3 (5.0) | 0 (0) | 2 (4.0) | |
| N0 | 48 (80.0) | 38 (80.8) | 43 (86.0) | |
| N1 | 4 (6.7) | 6 (12.8) | 3 (6.0) | |
| N2 | 5 (8.3) | 3 (6.4) | 2 (4.0) | |
| Tumour size, cm | 2.15 [0.9–5.8] | 2.7 [0.9–6.0] | 2.5 [1.0–11.0] | 0.13 |
| FEV1 | 82.00 [52–120] | 84.00 [43–109] | 88.00 [65–105] | 0.48 |
| DLCO | 79.00 [29–112] | 79.5 [46–108] | 84.5 [57–111] | 0.30 |
DLCO = diffusing capacity of the lungs for carbon monoxide; FEV1 = forced expiratory volume in 1 s; IQR = interquartile range; RATS = robotic-assisted thoracic surgery.