Univariate associations by time from arrival to hip fracture surgery
| Covariate, n (%) | Surgery ≤24 hours (n=413) | Surgery >24 hours (n=143) | P value |
| Demographics | |||
| Age ≥75 years | 266 (64.4) | 84 (58.7) | 0.23 |
| ISS >9 (other minor injury) | 122 (29.6) | 36 (25.2) | 0.31 |
| White race | 367 (88.9) | 110 (76.9) | <0.001 |
| Fall cause of injury | 393 (95.2) | 137 (95.8) | 0.75 |
| Comorbidity present | 336 (81.4) | 128 (90.1) | 0.01 |
| Pre-existing cognitive impairment | 35 (8.5) | 33 (23.1) | <0.001 |
| ASA score ≥3 | 286 (69.3) | 105 (73.4) | 0.35 |
| Surgical information | |||
| Hip fracture of the head or neck | 213 (52.0) | 96 (68.6) | 0.001 |
| Surgical replacement | 148 (35.8) | 78 (54.9) | <0.001 |
| General anesthesia | 352 (85.2) | 100 (69.9) | <0.001 |
| Hours to surgery, median (IQR) | 16 (9–20) | 29 (26–46) | <0.001 |
| Hours in surgery, median (IQR) | 0.8 (0.6–1.2) | 1.0 (0.7–1.4) | <0.001 |
| FICB information | |||
| FICB performed | 290 (70.2) | 109 (76.2) | 0.17 |
| Hours to FICB, median (IQR) | 3.4 (2.3–5.2) | 4.4 (2.5–17.6) | 0.001 |
| 2nd FICB performed | 7 (2.4) | 6 (5.5) | 0.20 |
| Placed by anesthesiologist | 280 (96.6) | 105 (96.3) | >0.99 |
| Hospital outcomes | |||
| Delirium within 48 hours postop | 25 (6.1) | 13 (9.1) | 0.21 |
| Preoperative pain score, mean (SD) | 3.6 (2.7) | 4.1 (2.5) | 0.06 |
| Postoperative pain score, mean (SD) | 2.9 (2.6) | 3.0 (2.4) | 0.59 |
| Preoperative OME, median (IQR) | 25 (8–53) | 42 (15–80) | <0.001 |
| Postoperative OME, median (IQR) | 35 (11–80) | 33 (10–113) | 0.40 |
ASA, American Society of Anesthesiology; FICB, fascia iliac compartment block; ISS, injury severity score; OME, oral morphine equivalent.