Outcome for the Utstein comparator group per 100 000 inhabitants
| Utstein comparator group | GRR N=4155 | NorCAR N=2274 | P value |
| Incidence in the Utstein comparator group | 9.7 | 8.8 | <0.001 |
| Incidence of transport to hospital (%)* | 7.8 (81) | 6.2 (71) | <0.001 |
| Status on arrival to hospital | |||
| Incidence of arrival to hospital with ROSC (%) | 6.4 (66) | 5.0 (57) | <0.001 |
| Incidence of arrival to hospital with ongoing CPR (%) | 1.4 (15) | 0.8 (9) | <0.001 |
| Incidence of 24-hour survival (%)† | 5.0 (13) | 5.2 (54) | 0.21 |
| Incidence of survival (%)‡ | 3.5 (36) | 3.8 (43) | 0.04 |
Utstein comparator group - out-of-hospital cardiac arrest (OHCA) witnessed by a bystander and shockable first rhythm.
*Declared dead/transport to hospital—missing, 16 (<1%) in GRR and 1 (<1%) in NorCAR.
†24-hour survival—missing, 541 (13%) in GRR and 28 (1%) in NorCAR.
‡Survival—missing, 455 (11%) in GRR and 24 (1%) in NorCAR.
CPR, cardiopulmonary resuscitation; EMS, emergency medical service; GRR, German Resuscitation Registry—areas with good quality data; NorCAR, Norwegian Cardiac Arrest Registry; ROSC, return of spontaneous circulation.