Postoperative pain scores and analgesic requirements.
| Control group (n=598) | Esketamine group (n=598) | P value | |
| Postoperative pain immediately after extubation | 0.007 | ||
| NRS：1–3 | 586 (97.99) | 596 (99.67) | |
| NRS：≥4 | 12 (2.01) | 2 (0.33) | |
| Postoperative pain, 15 min after extubation | 0.235 | ||
| NRS: 1–3 | 524 (87.63) | 537 (89.80) | |
| NRS: ≥4 | 74 (12.37) | 61 (10.20) | |
| Postoperative pain, 30 min after extubation | 0.365 | ||
| NRS: 1–3 | 586 (97.99) | 590 (98.66) | |
| NRS: ≥4 | 12 (2.01) | 8 (1.34) | |
| Use of analgesic drugs | 94 (15.72) | 70 (11.71) | 0.044 |
Data are presented as n (%).
NRS, Numeric Rating Scale.