Table 3.
Multivariable logistic regression analysis of factors associated with prehospital return of spontaneous circulation (ROSC achieved = 1).
| Label | OR | 95 % CI low | 95 % CI high | p value |
|---|---|---|---|---|
| Intercept | 0.835 | 0.43 | 1.62 | 0.593 |
| Pupillary diameter (per 1 mm) | 0.694 | 0.644 | 0.748 | <0.001 |
| Age (per year) | 0.994 | 0.989 | 0.999 | 0.027 |
| Female sex (vs male) | 0.857 | 0.718 | 1.023 | 0.087 |
| Bystander CPR (yes) | 1.363 | 1.155 | 1.609 | <0.001 |
| Public AED shock (yes) | 2.03 | 1.312 | 3.14 | 0.001 |
| Rescue team defibrillation (yes) | 1.508 | 1.117 | 2.034 | 0.007 |
| Adrenaline (yes) | 2.678 | 2.268 | 3.162 | <0.001 |
| Initial rhythm shockable (VF/VT) | 1.189 | 0.74 | 1.91 | 0.475 |
| Initial rhythm PEA | 1.233 | 0.843 | 1.803 | 0.28 |
| Initial rhythm asystole | 0.336 | 0.23 | 0.492 | <0.001 |
Multivariable logistic regression was adjusted for age, sex, bystander CPR, public AED shocks, rescue team defibrillation, adrenaline administration, and initial rhythm. OR = odds ratio; CI = confidence interval; ROSC = return of spontaneous circulation; CPR = cardiopulmonary resuscitation; AED = automated external defibrillator; VF = ventricular fibrillation; VT = ventricular tachycardia; PEA = pulseless electrical activity.