Table 1.
Patient characteristics in CO2 pneumothorax and one-lung ventilation groups both before and after inverse probability matching.
| Before matching | After matching | |||||
|---|---|---|---|---|---|---|
| Characteristics | One-lung ventilation (N=422 ) | CO2 pneumothorax (N=576) | P | One-lung ventilation (N=1008) | CO2 pneumothorax (N=995) | P |
| Age (mean±SDa) | 60.4±8.2 | 61.3±8.7 | 0.077 | 61.0±8.1 | 61.0±8.6 | 0.959 |
| Gender (M/F) | 311 (73.7)/111 (26.3) | 422 (73.3)/154 (26.7) | 0.936 | 755 (74.9)/253 (25.1) | 729 (73.3)/266 (26.7) | 0.628 |
| pT stages | <0.001 | 0.995 | ||||
| Tis | 15 (3.6) | 137 (23.8) | 162 (16.1) | 152 (15.3) | ||
| T1 | 94 (22.3) | 57 (9.9) | 151 (15.0) | 149 (15.0) | ||
| T2 | 67 (15.9) | 134 (23.3) | 204 (20.2) | 202 (20.3) | ||
| T3 | 243 (57.6) | 240 (41.7) | 482 (47.8) | 481 (48.3) | ||
| T4a | 3 (0.7) | 8 (1.4) | 9 (0.9) | 11 (1.1) | ||
| pN stages | 0.128 | 0.968 | ||||
| N0 | 225 (53.3) | 97 (42.0) | 591 (58.6) | 566 (56.9) | ||
| N1 | 115 (27.3) | 89 (38.5) | 254 (25.2) | 262 (26.3) | ||
| N2 | 68 (16.1) | 44 (19.0) | 138 (13.7) | 142 (14.2) | ||
| N3 | 14 (3.3) | 11 (1.9) | 25 (2.5) | 25 (2.5) | ||
| Smoking (Yes/No) | 194 (46.0)/228 (54.0) | 238 (41.3)/338 (58.7) | 0.161 | 448 (44.4)/560 (55.6) | 428 (43.0)/567 (57.0) | 0.700 |
| Alcohol (Yes/No) | 126 (29.9)/296 (70.1) | 135 (23.4)/441 (76.6) | 0.027 | 249 (24.7)/759 (75.3) | 251 (25.2)/744 (74.8) | 0.867 |
| R0 resection (Yes/No) | 4 (0.9)/418 (99.1) | 3 (0.5)/573 (99.5) | 0.465 | 6 (0.6)/1002 (99.4) | 3 (0.3)/992 (99.7) | 0.507 |
| Adjuvant therapies (Yes/No) | 86 (20.4)/336 (79.6) | 132 (22.9)/444 (77.1) | 0.459 | 215 (21.3)/793 (78.7) | 220 (22.1)/775 (77.9) | 0.677 |
a
SD, standard deviation.