Treatment and outcomes stratified with stair-climbing test result
| All patients | <11 m stairs | >12 m stairs | p-value | |
| Subjects n | 283 | 66 | 217 | |
| Operative approach | ||||
| VATS | 226 (79.9) | 56 (84.8) | 170 (78.3) | 0.248 |
| Type of surgery | 0.394 | |||
| Pneumonectomy | 3 (1.1) | 3 (1.4) | ||
| Bilobectomy | 4 (1.4) | 4 (1.8) | ||
| Lobectomy | 165 (58.3) | 35 (53.0) | 130 (59.9) | |
| Segmentectomy | 96 (33.9) | 25 (37.9) | 71 (32.7) | |
| Wedge | 9 (3.2) | 4 (6.1) | 5 (2.3) | |
| Combination | 5 (1.8) | 2 (3.0) | 3 (1.4) | |
| Bronchus | 1 (0.4) | 1 (0.5) | ||
| Lymph node dissection | 0.088 | |||
| No N2 | 24 (8.5) | 5 (7.6) | 19 (8.8) | |
| N2 sampling# | 21 (7.4) | 9 (13.6) | 12 (5.5) | |
| Systematic N2 dissection | 238 (84.1) | 52 (78.8) | 186 (85.7) | |
| Lymph nodes examined | 12 (7–16) | 10 (5–15) | 12 (8–16) | 0.114 |
| Oncological therapy | ||||
| Neoadjuvant | 33 (11.7) | 5 (7.6) | 28 (12.9) | 0.238 |
| Adjuvant | 61 (21.6) | 12 (18.2) | 49 (22.6) | 0.447 |
| Complications | ||||
| Any type | 94 (33.2) | 23 (34.8) | 71 (32.7) | 0.748 |
| Minor, CDC grade I–II | 63 (22.3) | 16 (24.2) | 47 (21.7) | 0.659 |
| Major, CDC grade IIIa–V | 31 (11.0) | 7 (10.6) | 24 (11.1) | 0.918 |
| Mortality | ||||
| 30-day | 1 (0.4) | 0 | 1 (0.5) | 0.581 |
| 90-day | 4 (1.4) | 2 (3.0) | 2 (0.9) | 0.204 |
| Hospital stay days | 5 (3–7) | 5 (4–7) | 4 (3–7) | 0.179 |
| Discharged to home | 233 (82.3) | 50 (75.8) | 183 (84.3) | 0.110 |
| 1-year alive and at home¶ | 230 (90.9) | 52 (81.3) | 178 (94.2) | 0.002 |
| Survival % | ||||
| 5-year overall | 64.7 | 49.9 | 70.0 | <0.001 |
| 5-year cancer-specific | 83.0 | 79.3 | 84.3 | 0.458 |
| 5-year non-cancer-specific | 77.9 | 62.9 | 83.1 | <0.001 |
Data are presented as n (%) or median (interquartile range), unless otherwise stated. VATS: video-assisted thoracoscopic surgery; CDC: Centers for Disease Control and Prevention. #: one or two N2 stations; ¶: alive and at home included patients operated at least 1 year before the end of follow-up.