[1] Univ Leicester, Dept Populat Hlth Sci, Biostat Res Grp, Leicester, England
[2] Univ Sheffield, Sch Hlth & Related Res, Sheffield, England
[3] Univ Manchester, NIHR Manchester Biomed Res Ctr, Manchester, England
[4] Univ Leicester, Leicester Real World Evidence Unit, Diabet Res Ctr, Leicester, England
[5] Univ Warwick, Dept Stat, Coventry, England