The UK CPRD data will be used to assess the characteristics of asthma patients who were prescribed ICS/LABA FDC before the index date and who initiated Spiriva Respimat, or received a higher dose of ICS/LABA FDC, or initiated LTRA, or switched to a new ICS/LABA FDC in the UK during the study period (September 2014-December 2017) enabling to assess potential channeling of prescribing to different patient populations.
