Table 1.
Demographic characters of patients in the RATS and VATS group before and after 1:1 propensity score matching
| Characteristics | Before propensity score matching | After propensity score matching | ||||
|---|---|---|---|---|---|---|
| RATS group (n = 63) |
VATS group (n = 50) |
P Value | RATS group (n = 35) | VATS group (n = 35) | P Value | |
| Age (years) | 49.48 ± 12.80 | 51.42 ± 10.48 | 0.388 | 50.97 ± 11.98 | 49.20 ± 9.62 | 0.497 |
| Gender | 0.003 | 1.000 | ||||
| Male | 44 (69.84) | 21 (42.00) | 18 (51.43) | 18 (51.43) | ||
| Female | 19 (30.16) | 29 (58.00) | 17 (48.57) | 17 (48.57) | ||
| BMI (Kg/m2) | 23.43 ± 2.94 | 23.84 ± 3.05 | 0.474 | 23.23 ± 2.94 | 24.11 ± 3.22 | 0.238 |
| Comorbidity (%) | 0.943 | 0.962 | ||||
| Hypertension | 7 (11.11) | 8 (16.00) | 6 (17.14) | 4 (11.43) | ||
| Diabetes | 2 (3.17) | 2 (4.00) | 2 (5.71) | 1 (2.86) | ||
| Coronary heart disease | 3 (4.76) | 1 (2.00) | 0 | 0 | ||
| COPD | 1 (1.59) | 1 (2.00) | 1 (2.86) | 1 (2.86) | ||
| Others | 4 (6.35) | 4 (8.00) | 3 (8.57) | 3 (8.57) | ||
| ASA status class | 0.455 | 1.000 | ||||
| I | 32 (50.79) | 29 (58.00) | 19 (54.29) | 20 (57.14) | ||
| II | 31 (49.21) | 21 (42.00) | 16 (45.71) | 15 (42.86) | ||
| III | 0 | 0 | 0 | 0 | ||
| Tumor size (cm), median (IQR) | 7.0 (6.0, 9.0) | 6.0 (5.5, 7.0) | 0.012 | 7.0 (6.0, 7.5) | 6.5 (5.6, 7.6) | 0.746 |
| Myasthenia Gravis, n (%) | 13 (20.63) | 8 (16.00) | 0.529 | 4 (11.43) | 7 (20.00) | 0.513 |
| WHO Classification, n (%) | 0.235 | 0.428 | ||||
| A | 10 (15.87) | 5 (10.00) | 7 (20.00) | 3 (8.57) | ||
| AB | 17 (26.98) | 20 (40.00) | 10 (28.57) | 15(42.86) | ||
| B1 | 7 (11.11) | 11 (22.00) | 6 (17.14) | 7 (20.00) | ||
| B2 | 20 (31.75) | 11 (22.00) | 11 (31.43) | 7 (20.00) | ||
| B3 | 5 (7.94) | 2 (4.00) | 1 (2.86) | 2 (5.71) | ||
| Thymic carcinoma | 4 (6.35) | 1 (2.00) | 0 (0) | 1 (2.86) | ||
| Masaoka Stage, n (%) | 0.048 | 0.439 | ||||
| I | 36 (57.14) | 40 (80.00) | 25 (71.43) | 28 (80.00) | ||
| IIa | 17 (26.98) | 6 (12.00) | 9 (25.71) | 5 (14.29) | ||
| IIb | 4 (6.35) | 3 (6.00) | 1 (2.86) | 2 (5.71) | ||
| III | 6 (9.53) | 1 (2.00) | 0 (0) | 0 (0) | ||
| IV | 0 (0) | 0 (0) | 0 (0) | 0 (0) | ||
| Pre-operative treatment, n (%) | 1.000 | 1.000 | ||||
| Yes | 2 (3.17) | 1 (2.00) | 1 (2.86) | 1 (2.86) | ||
| No | 61 (96.83) | 49 (98.00) | 34 (97.14) | 34 (97.14) | ||
Abbreviations: BMI Body mass index, COPD Chronic obstructive pulmonary disease, ASA American Society of Anesthesiology, IQR interquartile range, RATS Robot-assisted thoracoscopic surgery, VATS Video-assisted thoracoscopic surgery