Multivariate linear regression* oral morphine equivalents (OMEs)
| Covariate | Preoperative OME, mg | P value | Postoperative OME, mg | P value |
| Earlier surgery ≤24 hours from arrival (n=413) | ||||
| FICB vs no FICB | 17.5 vs 16.6 | 0.75 | 25.8 vs 26.3 | 0.91 |
| General vs regional anesthesia | 15.2 vs 19.3 | 0.29 | 25.0 vs 26.8 | 0.76 |
| ASA score ≥3 vs <3 | 17.3 vs 16.8 | 0.89 | 24.0 vs 27.9 | 0.40 |
| Later surgery >24 hours from arrival (n=143) | ||||
| FICB vs no FICB | 25.5 vs 45.2 | 0.04 | 26.8 vs 38.1 | 0.34 |
| General vs regional anesthesia | 35.5 vs 32.5 | 0.71 | 31.9 vs 32.1 | 0.96 |
| ASA score ≥3 vs <3 | 33.5 vs 34.5 | 0.89 | 26.3 vs 38.9 | 0.27 |
*Analysis using log-transformed OMEs; least squares mean OMEs presented as geometric means for ease of interpretation.
ASA, American Society of Anesthesiology; FICB, fascia iliac compartment block.