Table 3.
Multivariate analysis for factors associated with favorable neurological outcome at 1 month after cardiac arrest in patients with initially nonshockable rhythms
| Odds ratio (95 % CI) | P value | |
|---|---|---|
| Age (per year) | 0.97 (0.96–0.98) | <0.0001 |
| Male | 0.99 (0.58–1.69) | 0.97 |
| Public location | 1.54 (0.90–2.62) | 0.11 |
| Witnessed arrest | 1.30 (0.75–2.24) | 0.35 |
| Bystander CPR | 0.83 (0.47–1.48) | 0.54 |
| Call–response intervala (per minute) | 0.91 (0.83–0.99) | 0.037 |
| Initial rhythm PEA | 11.3 (5.94–21.6) | <0.0001 |
| Cardiac etiology | 1.82 (1.07–3.09) | 0.028 |
| Subsequently shocked | 2.78 (1.45–5.30) | 0.0020 |
P values calculated using a multivariate logistic regression
aShock delivery time was the interval from the initiation of CPR by EMS providers to the first shock delivery by EMS providers
CI confidence interval, CPR cardiopulmonary resuscitation, EMS emergency medical service, PEA pulseless electrical activity