Table 1. Patient characteristics, operative details and pathology†.
| Parameter | M-RATS (n=101) | U-RATS (n=101) | P value |
|---|---|---|---|
| Patients | |||
| Gender (male: female) | 63:38 | 60:41 | 0.66 |
| Age (years) | 69 [39–81] | 63 [19–82] | <0.0001 |
| Smoker | 52 (51%) | 52 (51%) | 1.00 |
| FEV1 (%) | 95 [44–171] | 90 [54–130] | 0.07 |
| DLCO (%) | 79 [42–127] | 76 [35–107] | 0.11 |
| Operative details | |||
| Laterality (right: left) | 58:43 | 57:44 | 0.88 |
| Lobectomy | 93 (92%) | 51 (50%) | <0.0001 |
| RUL | 27 | 18 | |
| RML | 7 | 2 | |
| RLL | 22 | 14 | |
| LUL | 21 | 5 | |
| LLL | 16 | 12 | |
| Pneumonectomy | 3 (3%) | 4 (4%) | 0.70 |
| Segmentectomy | 1 (1%) | 24 (24%) | 0.0006 |
| Other (combined resections, extended surgery, sleeve, lung sparing, tracheal/carinal resections) | 4 (4%) | 22 (22%) | 0.09 |
| Operative time (minutes) | 150 [60–300] | 136 [30–308] | 0.0001 |
| Chest drain removal (days) | 5 [0–21] | 2 [1–17] | <0.0001 |
| Conversion to open | 2 (2%) | 0 | 0.19 |
| Pathology | |||
| Tumor size (cm) | 2.6 [0.3–8.9] | 3.3 [1.0–9.0] | 0.003 |
| Histology | |||
| Adenocarcinoma | 65 (64%) | 42 (42%) | 0.001 |
| Squamous | 21 (21%) | 10 (10%) | 0.04 |
| Carcinoid | 10 (10%) | 8 (8%) | 0.63 |
| Others | 5 (5%) | 41 (41%) | <0.0001 |
| R0 | 101 (100%) | 101 (100%) | 1.00 |
| Number of lymph nodes | 11 [5–54] | 15 [0–41] | 0.87 |
| Stage | 0.0003 | ||
| I | 65 (64%) | 27 (39%) | |
| II | 19 (20%) | 25 (36%) | |
| III | 12 (13%) | 17 (25%) | |
†, all values reported are medians with range variations, unless otherwise specified. M-RATS, multiportal robotic-assisted thoracic surgery; U-RATS, uniportal robotic-assisted thoracic surgery; FEV1, forced expiratory volume in 1 second; DLCO, diffusing capacity of the lungs for carbon monoxide; RUL, right upper lobe; RML, right middle lobe; RLL, right lower lobe; LUL, left upper lobe; LLL, left lower lobe.