Table 1.
Patient’s demographics data before and after matching.
| Variable | Before matching | After matching | ||||
|---|---|---|---|---|---|---|
|
| ||||||
| MV-VATS group | SV-VATS group | P value | MV-VATS group | SV-VATS group | P value | |
| n=79 | n=42 | n=39 | n=39 | |||
|
| ||||||
| Median age (y) | 53.77 (16.32) | 46.57 (18.42) | 0.029 | 45.5 (18.0) | 45.7 (18.7) | 0.956 |
|
| ||||||
| Gender (n,%) | 0.950 | 0.617 | ||||
| Male | 56 (71%) | 30 (71%) | 27 (69%) | 29 (74%) | ||
| Female | 23 (29%) | 12 (29%) | 12 (31%) | 10 (26%) | ||
|
| ||||||
| Body mass index (kg/m2) | 21.73 (3.5) | 21.17 (3.8) | 0.424 | 21.4 (3.5) | 21.3 (3.9) | 0.832 |
|
| ||||||
| ASA physical status class (n, %) | 0.029 | 0.852 | ||||
| I | 21 (27%) | 17 (40%) | 18 (46%) | 17 (44%) | ||
| II | 42 (53%) | 19 (45%) | 16 (41%) | 17 (44%) | ||
| III | 16 (20%) | 6 (15%) | 5 (13%) | 5 (12%) | ||
|
| ||||||
| Comorbidity (n, %) | <0.001 | 0.493 | ||||
| Cardiovascular disease | 6 (8%) | 3 (7%) | 3 (8%) | 3 (8%) | ||
| Pulmonary disease | 5 (6%) | 4 (9%) | 2 (5%) | 3 (8%) | ||
| Neurological disease | 1 (1%) | 0 | 0 | 0 | ||
| Thyropathy | 0 | 2 (5%) | 0 | 0 | ||
| Two kinds of comorbidities | 1 (1%) | 1 (2%) | 0 | 1 (3%) | ||
|
| ||||||
| LVEF (%) | n=62 | n=35 | 0.660 | n=35 | n=35 | 0.487 |
| 71.37 (5.66) | 71.91 (6.08) | 70.3 (5.3) | 71.3 (6.0) | |||
|
| ||||||
| Cardiac risk index (n, %) | 0.852 | 0.559 | ||||
| 1 point | 76 (96%) | 40 (95%) | 38 (97%) | 37 (95%) | ||
| 2 points | 3 (4%) | 2 (5%) | 1 (3%) | 2 (5%) | ||
|
| ||||||
| Types of prior thoracic procedure (n, %) | 0.554 | 0.887 | ||||
| Bullectomy | 27 (34%) | 16 (39%) | 15 (38%) | 15 (38%) | ||
| Wedge resection | 6 (7%) | 3 (7%) | 1 (3%) | 3 (8%) | ||
| Lobectomy | 41 (52%) | 22 (52%) | 23 (59%) | 20 (51%) | ||
| Segmentectomy | 2 (3%) | 1 (2%) | 0 | 1 (3%) | ||
| Lung volume reduction | 3 (4%) | 0 | ||||
|
| ||||||
| Prior surgical site (n, %) | 0.392 | 0.513 | ||||
| Left side | 38 (48%) | 17 (41%) | 18 (46%) | 15 (38%) | ||
| Right side | 40 (51%) | 24 (57%) | 20 (51%) | 23 (59%) | ||
| Both sides | 1 (1%) | 1 (2%) | 1 (3%) | 1 (3%) | ||
|
| ||||||
| Pathology diagnosis of the second surgery (n, %) | 0.465 | 0.798 | ||||
| Bulla | 30 (38%) | 17 (40%) | 18 (46%) | 15 (39%) | ||
| Malignant | 39 (49%) | 23 (55%) | 18 (46%) | 24 (61%) | ||
| Benign | 7 (9%) | 2 (5%) | 2 (5%) | 0 | ||
| Bronchiectasia | 1 (1%) | 0 | 1 (3%) | 0 | ||
| COPD | 2 (3%) | 0 | 0 | 0 | ||
|
| ||||||
| Median interval between prior and secondary thoracic surgery (month) | 0.546 | 0.824 | ||||
| 32.29 (5–48) | 25.57 (6–36) | 15 (8–37) | 16 (6–36) | |||
|
| ||||||
| Preoperative hospital stay (d) | 8 (4–9) | 7 (3–10) | 0.714 | 5 (3–8) | 6 (3–10) | 0.233 |
|
| ||||||
| Pulmonary function tests (n=23, %) | n=53 | n=25 | 0.304 | n=23 | n=23 | 0.996 |
| FVC% predicted | 87.27 (20.64) | 91.98 (13.63) | 0.208 | 91.3 (22.7) | 91.3 (13.4) | 0.801 |
| FEV1% predicted | 77.17 (21.58) | 83.26 (15.14) | 0.536 | 81.1 (20.8) | 82.4 (15.0) | 0.769 |
| FEV1/FVC | 90.08 (15.26) | 92.24 (11.95) | 93.1 (13.9) | 91.9 (12.4) | ||
|
| ||||||
| DLCO% predicted (%) | n=23 | n=16 | 0.070 | n=12 | n=13 | 0.811 |
| 73.9 (18.3) | 83.0 (8.3) | 79.6 (14.0) | 80.7 (7.3) | |||
LVEF – left ventricular ejection fraction; FVC – forced vital capacity; FEV1 – forced expiratory volume in one second; COPD – chronic obstructive pulmonary emphysema; DLCO – carbon monoxide diffusing capacity.