Table 4.
Multivariate analysis.
| Characteristic | Adjusted OR for ROSC (95% CI) | Adjusted OR for 24-h survival (95% CI) | Adjusted OR for survival to discharge (95% CI) |
|---|---|---|---|
| Patient characteristics | |||
| Cardiovascular support | NS | NS | 0.43 (0.24-0.78) |
| Respiratory support | NS | NS | 0.45 (0.24-0.83) |
| Cardiac surgery patient (compared to non-cardiac) | 2.15 (1.35-3.45) | 4.22 (2.65-6.71) | 2.65 (1.36-5.20) |
| Cardiac non-surgical patient (compared to non-cardiac) | NS | 1.95 (1.19-3.19) | 2.14 (1.08-4.23) |
| Trauma patient (compared to non-cardiac) | 0.51 (0.28-0.93) | 0.18 (0.08-0.40) | 0.18 (0.06-0.59) |
| Event characteristics | |||
| Subsequent pVT/VF (compared with initial pVT/VF) | NS | 0.45 (0.30-0.67) | 0.38 (0.21-0.67) |
| Event in operating room/PACU | NS | NS | 5.37 (1.63-17.74) |
| Treatment characteristics | |||
| Lidocaine | 2.02 (1.36-3.00) | 1.66 (1.11-2.49) | NS |
| Event durationa | ≤16 min | ≤10 min | ≤11 min |
| 3.23 (1.96-5.34) | 4.55 (2.68-7.73) | 2.50 (1.28-4.85) | |
| Defibrillation attemptsa | ≤4 attempts 2.49 (1.57-3.96) | ≤4 attempts 3.05 (1.77-5.24) | ≤3 attempts 2.03 (1.09-3.79) |
| Epinephrine ≤3 doses | 2.17 (1.43-3.29) | NS | 2.22 (1.24-3.98) |
| Time to defibrillation | NS | 1.66 (1.06-2.58) | NS |
| <1 min |
CI, confidence interval; NS, not statistically significant; pVT/VF, pulseless ventricular tachycardia/ventricular fibrillation; OR, odds ratio; ROSC, return of spontaneous circulation for >20min; PACU. post anesthesia care unit.
a
Specific cutoff points for continuous variables are shown for each multivariate model.