Funding for this research was provided by:
Medical Research Council (MR/P023347/1)
Economic and Social Research Council (ES/M001660/1, ES/K000357/1)
Received: 21 December 2020
Accepted: 22 March 2021
First Online: 21 April 2021
: All of the studies have received ethical approval and obtained informed parental and/or participant consent, both of which cover the secondary analyses reported here. Data collection in the NSHD received multicentre research ethics committee approval (MREC98/1/121), the NCDS obtained ethical approval from the South East MREC (ref:01/1/44), and the BCS70 obtained ethical approval from the National Research Ethics Service (NRES) Committee South East Coast – Brighton and Sussex (Ref. 15/LO/1446). Further details are available from the study websites and/or cohort profiles.
: Not applicable
: We declare no competing interests.