Funding for this research was provided by:
Health Foundation (773005)
Received: 22 February 2020
Accepted: 19 June 2020
First Online: 26 June 2020
Ethics approval and consent to participate
: Relevant ethical approval of the research was obtained through Loughborough University’s Ethics Approvals (Human Participants) Sub-Committee ExternalRef removed under HPSC Reference Number: C18–09. Written informed consent was not required from each participant as the data for the harmonised BHPS/USS was accessed under a standard End User Licence arrangement for an academic research project as the data are fully anonymised ExternalRef removed.
: No consent for publication was required as the data are freely available for academic research from the UK Data Archive ExternalRef removed.
: The authors declare that they have no competing interests.