Table 2.
Results of regression modelling of survival to 30 days.
| Variable | OR | 95% CI | p-value |
| Age | 0.96 | 0.95–0.97 | 0.00 |
| Male gender | 1.37 | 0.99–1.90 | 0.06 |
| Bystander CPR | 0.94 | 0.65–1.37 | 0.76 |
| Arrest to crew arrival time (per elapsed minute) | 1.00 | 0.98–1.01 | 0.62 |
| Witness status | |||
| Unwitnessed | Reference | Reference | Reference |
| Witnessed: bystander | 1.78 | 1.18–2.71 | 0.01 |
| Witnessed: EMS | 4.98 | 2.55–9.85 | 0.00 |
| Presenting rhythm | |||
| Asystole | Reference | Reference | Reference |
| PEA | 0.95 | 0.55–1.63 | 0.85 |
| Shockable | 10.11 | 6.8–15.39 | 0.00 |
| Location | |||
| Private | Reference | Reference | Reference |
| Public | 2.07 | 1.48–2.88 | 0.00 |
| Nursing home | 0.41 | 0.11–1.14 | 0.12 |
| Ambulance | 2.07 | 0.93–4.75 | 0.08 |
| Status at hospital | |||
| ROSC on arrival at hospital | 54.82 | 35.46–89.12 | 0.00 |
| RAT | |||
| No RAT present | Reference | Reference | Reference |
| RAT present | 1.01 | 0.74–1.38 | 0.93 |
| RAT present (Unadjusted)* | 0.98 | 0.79–1.21 | 0.84 |
*Crude analysis with no adjustments for any other covariates.