Description of the six participating Australian Resuscitation Outcomes Consortium (Aus-ROC) regions
| Region | Ambulance service | Service area population | Geographic area (ha) |
|---|---|---|---|
| South Australia, Australia | SA Ambulance Service | 1 685 7149 | 98 417 96611 |
| Victoria, Australia | Ambulance Victoria | 5 841 6679 | 22 749 55212 |
| Western Australia, Australia | St John Ambulance Western Australia | 2 573 3899 | 252 641 78613 |
| Queensland, Australia | Queensland Ambulance Service | 4 722 4479 | 172 582 59314 |
| Australian Registries | 14 823 217 | 121 809 304 | |
| New Zealand (excluding Wellington) | St John New Zealand | 4 018 37010 | 26 152 19515 |
| Wellington, New Zealand | Wellington Free Ambulance | 491 38010 | 813 00516 |
| New Zealand Registries | 4 509 750 | 26 965 200 | |
| Total | 19 332 967 | 573 357 097 |
Australia population=23 490 736, Australia geographic area=758 848 540.5 ha,12 New Zealand population=4 509 750,10 New Zealand geographic area=26 965 200 ha.15