Additional file 1 of Co-prescribing of antidepressants and opioids for non-cancer pain in England, 2010–2019: a descriptive study using CPRD primary care electronic health records

Additional file 1. Code lists for CPRD GOLD used to identify antidepressants, opioids for non-cancer pain, ethnic group, neuropathic pain, depression, anxiety / phobia, cancer, terminal illness, opioid use disorder and heart failure; contraindicated combinations of opioids and antidepressants.