Table 2. Intraoperative factors.
| Variable | Overall (n = 570) | Delirium (n = 38) | Non-delirium (n = 532) | P value |
|---|---|---|---|---|
| Operated side, n (%) | 0.14† | |||
| Left | 229 (40.2) | 11 (28.9) | 218 (41.0) | |
| Right | 341 (59.8) | 27 (71.1) | 314 (59.0) | |
| Approach, n (%) | 0.51† | |||
| VATS | 329 (57.7) | 20 (52.6) | 309 (58.1) | |
| Open | 241 (42.3) | 18 (47.4) | 223 (41.9) | |
| Surgical procedure, n (%) | 0.85† | |||
| Wedge resection | 101 (17.7) | 8 (21.1) | 93 (17.5) | |
| Segmentectomy or lobectomy | 410 (71.9) | 26 (68.4) | 384 (72.2) | |
| Pneumonectomy or extended operation | 59 (10.4) | 4 (10.5) | 55 (10.3) | |
| Length of procedure, min (range) | 264 (44–700) | 267.5 (56–487) | 264.0 (44–700) | 0.69†† |
| Bleeding, ml (range) | 70 (5–1820) | 70 (5–1820) | 70 (5–1640) | 0.87†† |
| Intraoperative infusion volume, ml (range) | 1800 (100–6300) | 1800 (400–5400) | 1800 (100–6300) | 0.68†† |
| Epidural anesthesia, n (%) | 484 (84.9) | 29 (84.9) | 455 (85.5) | 0.13† |
VATS, video-assisted thoracic surgery
†, Pearson's chi-squared test
††, Mann–Whitney U-test