Received: 21 July 2020
Accepted: 3 February 2021
First Online: 15 February 2021
Ethics approval and consent to participate
: The study was approved by the Monash University Human Research Ethics Committee (Project no: 1256), the New South Wales Population and Health Services Research Ethics Committee (REF: 2017/HRE0601) and the Department of Health WA Human Research Ethics Committee (RGS0000000613). Historical administrative data was used. The research is low risk in that there was no discomfort or risk of harm to the participants. Name, date of birth and other identifiers were removed from the dataset by the data custodians prior to release of the data to the researchers. Due to the magnitude of the dataset, it was impractical to obtain consent. Datasets were extracted by the relevant data linkage units in each state, therefore the authors did not access the raw data; the extracted data were de-identified unit records. Data custodian approvals were obtained from the following data custodians via the data linkage units; Victorian Agency for Health Information, Victorian Cost Data Collection, Registrar of Births, Deaths and Marriages Victoria, NSW Ministry of Health, Department of Health – Government of Western Australia, and the Australian Co-ordinating Registry.
: Not applicable.
: All authors declare no support from any organisation for the submitted work. DTF has received funding support from the Victorian Injury Surveillance Unit (VISU) at Monash University to pay for two datasets and PhD supervision. No other relationships or activities that could appear to have influenced the submitted work.