Abstract Background Clinically coded long COVID cases in electronic health records are incomplete, despite reports of rising cases of long COVID. Aim To determine patient characteristics associated with clinically coded long COVID. Design & setting With the approval of NHS England, we conducted a cohort study using electronic health records within the OpenSAFELY-TPP platform in England, to study patient characteristics associated with clinically coded long COVID from 29 January 2020 to 31 Mar...