Additional file 1 of Impact of COVID-19 lockdown on the incidence and mortality of acute exacerbations of chronic obstructive pulmonary disease: national interrupted time series analyses for Scotland and Wales

Additional file 1. Includes Read codes for COPD diagnosis, acute exacerbation of COPD, and smoking status used for sensitivity analysis, model diagnostics (Table A), the results of the sensitivity analysis (Tables B, C, D, and E), and the reporting checklists (FERITS, STROBE, RECORD).