Recovery time after surgery.
| Control group (n=598) | Esketamine group (n=598) | P value | |
| T1 (min), median (IQR) | 23.00 (13.00, 37.00) | 20.00 (11.00, 32.00) | 0.001 |
| T2 (min), median (IQR) | 38.00 (31.00, 50.00) | 37.00 (31.00, 50.00) | 0.738 |
| T3 (min), median (IQR) | 66.00 (51.00, 85.00) | 62.00 (48.00, 82.00) | 0.015 |
| Delayed PACU discharge, n (%) | 38 (6.35) | 30 (5.02) | 0.318 |
PACU, post-anaesthesia care unit; T1, extubation time; T2, PACU observation time; T3, The total PACU time.