Independent predictors of early and late survival
| Predictors | Brought to hospital on admission with pulse | Alive at 1 month |
| OR (95% CI) | OR (95% CI) | |
| Increasing age | 1.009 (1.004 to 1.014) | 0.98 (0.97 to 0.98) |
| Female gender | 1.82 (1.57 to 2.10) | 1.43 (1.17 to 1.75) |
| Cardiac arrest at home | 0.77 (0.68 to 0.87) | 0.50 (0.42 to 0.60) |
| Bystander CPR | 1.70 (1.50 to 1.92) | 2.47 (2.06 to 2.96) |
| Increasing delay to defibrillation | 0.30 (0.26 to 0.36) | 0.24 (0.20 to 0.29) |
CPR, cardiopulmonary resuscitation.