Funding for this research was provided by:
Chief Scientist Office, Scottish Government Health and Social Care Directorate (HIPS/16/59)
Received: 9 September 2020
Accepted: 5 February 2021
First Online: 22 March 2021
Ethics approval and consent to participate
: We obtained approval to conduct this study from the National Health Service (NHS) Scotland Public Benefit and Privacy Panel for Health and Social Care (study ref. 1617-0179). National Services Scotland have sought and achieved a favourable ethical opinion from the East of Scotland NHS Research Ethics Service. Since our project met the specific criteria for projects involving secondary analysis of National Services Scotland data, further ethical approval was not required. The data used in this study were obtained from pseudonymised administrative health datasets which are available for research purposes without the requirement for patient consent.
: Not applicable
: The authors declare that they have no competing interests.