Outcomes for Patients who received general or spinal anesthesia for hip fracture surgery, stratified by ASA score
| Outcome | ASA I–II (n=2706) | ASA III (n=8806) | ASA IV (n=2878) | |||
| General vs spinal (mean) | P value | General vs spinal (mean) | P value | General vs spinal (mean) | P value | |
| Operative time (min) | 67.12 vs 62.25 | <0.001 | 64.77 vs 60.31 | <0.001 | 61.48 vs 58.99 | 0.048 |
| Total hospital LOS (days) | 4.78 vs 5.39 | 0.004 | 10.95 vs 6.23 | 0.018 | 6.46 vs 7.11 | 0.28 |
| Outcome | OR (general vs spinal) (95% CI) | P value | OR (general vs spinal) (95% CI) | P value | OR (general vs spinal) (95% CI) | P value |
| 30-day complications | ||||||
| Combined stroke/MI/death rate | 1.103 (0.668 to 1.824) | 0.71 | 1.061 (0.891 to 1.264) | 0.51 | 1.467 (1.178 to 1.825) | <0.001 |
| Death | 1.8 (0.831 to 3.899) | 0.14 | 1.190 (0.963 to 1.470) | 0.11 | 1.482 (1.163 to 1.887) | 0.002 |
| Stroke | 1.125 (0.434 to 2.916) | 0.81 | 0.806 (0.494 to 1.314) | 0.40 | 1.857 (0.741 to 4.655) | 0.20 |
| Myocardial infarction | 0.647 (0.303 to 1.381) | 0.25 | 0.940 (0.690 to 1.280) | 0.69 | 1.606 (1.040 to 2.480) | 0.032 |
| Reoperation | 1.529 (0.830 to 2.819) | 0.17 | 1.080 (0.807 to 1.446) | 0.60 | 1.353 (0.868 to 2.108) | 0.17 |
| Acute renal failure | Not calculated | 5.0 (1.096 to 22.820) | 0.021 | 1.182 (0.529 to 2.638) | 0.68 | |
| Cardiac arrest requiring CPR | 3.0 (0.312 to 28.841) | 0.32 | 1.70 (0.979 to 2.953) | 0.056 | 1.214 (0.599 to 2.463) | 0.59 |
| Unplanned intubation | 2.5 (0.784 to 7.971) | 0.11 | 1.407 (0.859 to 2.305) | 0.18 | 1.278 (0.690 to 2.368) | 0.44 |
| Ventilator support >48 hours | 0.667 (0.111 to 3.990) | 0.65 | 1.455 (0.675 to 3.134) | 0.34 | 1.50 (0.613 to 3.670) | 0.37 |
| DVT or thrombophlebitis | 2.571 (1.074 to 6.156) | 0.027 | 1.611 (1.063 to 2.442) | 0.024 | 1.667 (0.729 to 3.808) | 0.22 |
| Pulmonary embolism | 1.667 (0.606 to 4.586) | 0.34 | 1.083 (0.689 to 1.704) | 0.73 | 1.0 (0.449 to 2.226) | 1.00 |
| Postoperative delirium | 0.908 (0.731 to 1.126) | 0.39 | 0.945 (0.860 to 1.037) | 0.23 | 1.083 (0.929 to 1.262) | 0.30 |
a: alpha level set at 0.05.
b: OR not calculated. Insufficient variation to calculate.
ASA, American Society of Anesthesiologists; CPR, cardiopulmonary resuscitation; DVT, deep vein thrombosis; LOS, length of stay; MI, myocardial infarction.