| copd_exac_gprd | Exacerbation of COPD (primary care) |
| copd_gprd | COPD diagnosis (primary care) |
| copd_hes | COPD diagnosis (secondary care) |
| mrc_breath_scale_gprd | MRC Breathlessness Scale |
| influenza_gprd | Influenza diagnosis (primary care) |
| influenza_vacc | Influenza vaccination (primary care) |
| respiratory_charlson_gprd | Respiratory disease for Charlson index (primary care) |
| respiratory_charlson_hes | Respiratory disease for Charlson index (secondary care) |