PERCE-MUCO: Perceptions and Expectations of People With Cystic Fibrosis Regarding a Change in Treatment

PERCE-MUCO is a prospective, multicentre, mixed-methods observational study investigating the perceptions, expectations and treatment-change intentions of adults with cystic fibrosis who are currently treated with elexacaftor/tezacaftor/ivacaftor (ETI) or whose treatment has been medically discontinued. The study focuses on patients' stated willingness to switch from ETI to vanzacaftor/tezacaftor/deutivacaftor (VTD), and on the factors associated with this intention, including treatment satisfaction, knowledge and expectations regarding VTD, quality of life, treatment adherence, reported adverse effects, access-related concerns and desired support from an advanced practice nurse. The quantitative component uses a study-specific questionnaire and routine-care CFQ-R 14+ and Morisky-8 data. A qualitative component consists of semi-structured interviews at the Roscoff cystic fibrosis centre.