The impact of elexacaftor/tezacaftor/ivacaftor on cystic fibrosis health-related quality of life and decision-making about daily treatment regimens: a mixed methods exploratory study.

ABSTRACT

Background: Elexacaftor/tezacaftor/ivacaftor (ETI) has reduced many symptoms of cystic fibrosis (CF). Objectives: We sought to identify the impact of ETI on both symptoms and treatment decisions among adults with CF. Design: Participants were enrolled in a cross-sectional study. Surveys were sent via a RedCap link. Semistructured interviews were administered remotely via Microsoft Teams. Interviews were audio recorded and professionally transcribed. Methods: We assessed Cystic Fibrosis Questionnaire-Revised (CFQ-R) subscales for physical, respiratory, emotion, and treatment, and analyzed semistructured interviews covering CF treatment regimens and daily living. Quantitative and qualitative results were analyzed separately and via a mixed-methods convergence coding matrix. Results: Twenty-four adults with CF taking ETI were included. CFQ-R subscale scores (mean scores/standard deviation) were physical (82.1/22.8), respiratory (83.7/11.2), emotion (65.3/14.2), and treatment (57.5/20.1). Three themes about decision-making for non-ETI-treatments emerged (1) How I'm feeling, (2) Not noticing a difference, and (3) Uncertainty about long-term impact of modifying treatment regimens, and we found participants weighed each of these factors in their treatment decisions. Key findings from mixed-methods analysis show that among individuals experiencing higher CFQ-R scores for physical and respiratory compared to emotion and treatment, there were statements indicating that while those participants were experiencing better physical health, many continued their burdensome treatment regimens. Conclusion: With little long-term data on the impact of reducing non-ETI treatments, participants weighed how they were feeling, treatment efficacy beliefs, and risk tolerance when making treatment decisions.

The impact of Trikafta on CF health, health-related quality of life, and treatment adherence People with cystic fibrosis may be experiencing many health benefits from taking Trikafta, leading some people to cut back on or stop their other non-Trikafta treatments. We explored the impact of Trikafta on CF health, health-related quality of life, and treatment adherence for people with CF currently taking Trikafta. We compared health-related quality of life subscales from the CF Questionnaire-Revised questionnaire focused on physical symptoms, respiratory symptoms, treatment burden, and emotional well-being to assess whether people with CF were experiencing improved physical and respiratory health compared to emotional health and feelings of treatment burden. We found that many people were feeling better physically, but were still experiencing poor mental health and high treatment burden. We then looked at results from open-ended interviews to see if our qualitative data could explain the differences in the health-related quality of life scores. We found that while people were feeling better physically, many people were still continuing with the pre-Trikafta treatment regimens which may explain why physical health and respiratory health scores were higher than emotional well-being and treatment burden scores. At this time, we believe that more research is needed to guide treatment decisions related to cutting back or stopping burdensome treatment regimens.