Table 4. Baseline demographic and clinical characteristics of patients before and after 1:1:1 PSM.
| Patients number after PSM | ||||
|---|---|---|---|---|
| SV-VATS, 197 (%) | MV-VATS, 197 (%) | OPEN, 197 (%) | P value | |
| Age, year | 0.139 | |||
| ≤45 | 27 (13.7) | 27 (13.7) | 30 (15.2) | |
| 45–65 | 140 (71.1) | 121 (61.4) | 133 (67.5) | |
| >65 | 30 (15.2) | 49 (24.9) | 34 (17.3) | |
| Gender | 0.841 | |||
| Male | 102 (51.8) | 95 (48.2) | 102 (51.8) | |
| Female | 95 (48.2) | 102 (51.8) | 95 (48.2) | |
| Pathology | 0.661 | |||
| Adenocarcinoma | 173 (87.8) | 170 (86.3) | 173 (87.8) | |
| Squamous carcinoma | 15 (7.6) | 15 (7.6) | 18 (9.1) | |
| Others | 9 (4.6) | 12 (6.1) | 6 (3.0) | |
| T stage | 0.397 | |||
| T1 | 119 (60.4) | 100 (50.8) | 112 (56.9) | |
| T2 | 70 (35.5) | 89 (45.2) | 78 (39.6) | |
| T3+T4 | 8 (4.1) | 8 (4.1) | 7 (3.6) | |
| N stage | 0.281 | |||
| N0 | 151 (76.6) | 156 (79.2) | 147 (74.6) | |
| N1 | 16 (8.1) | 13 (6.6) | 25 (12.7) | |
| N2 | 30 (15.2) | 28 (14.2) | 25 (12.7) | |
| TNM stage | 0.456 | |||
| I | 147 (74.6) | 142 (72.1) | 140 (71.1) | |
| II | 18 (9.1) | 24 (12.2) | 30 (15.2) | |
| III | 32 (16.2) | 31 (15.7) | 27 (13.7) | |
SV-VATS, spontaneous ventilation video-assisted thoracoscopic surgery; MV-VATS, double-lumen intubated mechanical ventilation video-assisted thoracoscopic surgery; OPEN, thoracotomy.