Multivariate logistic regression: delirium within 48 hours postoperative
| Covariate | OR | 95% CI | P value |
| Earlier surgery ≤24 hours from arrival (n=413) | |||
| FICB vs no FICB | 1.00 | 0.4 to 2.5 | >0.99 |
| General vs regional anesthesia | 0.42 | 0.2 to 1.1 | 0.09 |
| ASA score ≥3 vs <3 | 11.75 | 1.6 to 88.5 | 0.02 |
| Later surgery >24 hours from arrival (n=143) | |||
| FICB vs no FICB | 4.21 | 0.5 to 33.8 | 0.18 |
| General vs regional anesthesia | 0.62 | 0.2 to 2.1 | 0.44 |
| ASA score ≥3 vs <3 | 2.25 | 0.5 to 10.8 | 0.31 |
ASA, American Society of Anesthesiology; FICB, fascia iliac compartment block.