Table 1 Patient characteristics before and after nearest-neighbor propensity-score matching(PSM)
Before PSM | After PSM | |||||
|---|---|---|---|---|---|---|
SOA Group (n = 4146) | OFA Group (n = 101) | P-value | SOA Group (n = 101) | OFA Group (n = 101) | P-value | |
Age (years) | 58.00 ± 15.00 | 57.07 ± 11.41 | 0.960 | 58.05 ± 11.27 | 57.07 ± 11.41 | 0.540 |
Male/female | 1894/2252 | 52/49 | 0.248 | 51/50 | 52/49 | 0.888 |
BMI (kg/m2) | 24.03 ± 4.04 | 24.04 ± 3.07 | 0.518 | 23.87 ± 2.80 | 24.04 ± 3.07 | 0.684 |
ASA (n (%)) | 0.122 | 0.489 | ||||
I | 786 (19.0) | 13 (12.9) | 17 (16.8) | 13 (12.9) | ||
II | 3147 (76.0) | 86 (85.1) | 80 (79.2) | 86 (85.1) | ||
III | 211 (5.0) | 2 (2.0) | 4 (4.0) | 2 (2.0) | ||
IV | 2 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | ||
HBP (yes/no) | 1164/2982 | 28/73 | 0.938 | 27/74 | 28/73 | 0.874 |
Classification of surgery (n (%)) | 0.297 | 0.807 | ||||
Wedge resection | 1251 (30.2) | 40 (39.60) | 39 (38.61) | 40 (39.60) | ||
Segmentectomy | 149 (3.6) | 3 (2.97) | 4 (3.96) | 3 (2.97) | ||
Lobectomy | 2277 (54.9) | 50 (49.51) | 50 (49.51) | 50 (49.51) | ||
Sleeve pneumonectomy | 13 (0.3) | 0 (0) | 0 (0) | 0 (0) | ||
Unilateral pneumonectomy | 15 (0.4) | 1 (0.99) | 0 (0) | 1 (0.99) | ||
Thymic mediastinal surgery | 441 (10.6) | 7 (6.93) | 8 (7.92) | 7 (6.93) | ||
Intraoperative bleeding volume (mL) | 30 [20;50] | 20 [20;50] | 0.024 | 20 [15;30] | 20 [20;50] | 0.356 |