Regression analysis for Utstein group for the outcome survival to discharge
| Outcome | ||||
|---|---|---|---|---|
| Variable | Survived (n=106) | Died (n=396) | Model 1* (95% CI) | Model 2† (95% CI) |
| Under 65 years | 63 | 175 | 1.8 (1.2 to 2.9)‡ | 1.6 (1.0 to 2.6) |
| Male | 88 | 305 | 1.5 (0.8 to 2.6) | 1.2 (0.6 to 2.2) |
| Urban setting | 71 | 219 | 1.6 (1.0 to 2.6) ‡ | 1.4 (0.9 to 2.3) |
| Public location | 70 | 131 | 3.9 (2.5 to 6.2) ‡ | 3.1 (1.9 to 5.0)‡ |
| Bystander CPR | 95 | 310 | 2.4 (1.2 to 4.7) ‡ | 2.4 (1.2 to 4.9)‡ |
| Was shock delivered§ | 106 | 0 | NA | NA |
| Early defibrillation attempted¶ | 48 | 112 | 2.1 (1.4 to 3.3)‡ | 1.4 (0.9 to 2.3) |
| EMS CRI 8 min or less | 47 | 104 | 2.2 (1.4 to 3.5)‡ | 2.2 (1.3 to 3.6)‡ |
*Univariate analysis.
†Multivariate analysis. All variables listed in the rows, except ‘Was shock delivered’ were included in the multivariate analysis.
‡Statistically significant.
§The variable ‘Was shock delivered’ was omitted from analysis as it is a constant, that is, shock delivered to all cases included in the analysis.
¶Patients were defined as having received early defibrillation if defibrillation was attempted by a bystander or if EMS defibrillation was attempted and the CRI was 5 min or less.
CPR, cardiopulmonary resuscitation; CRI, call–response interval; EMS, emergency medical services.