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ORIGINAL RESEARCH article

Front. Pediatr.

Sec. Pediatric Pulmonology

Volume 13 - 2025 | doi: 10.3389/fped.2025.1654122

THE EFFECT OF MODULATORS ON LUNG FUNCTION FOLLOWING INPATIENT TREATMENT FOR CF EXACERBATIONS

Provisionally accepted
Anne  StoneAnne Stone*Meredith  HaagMeredith HaagCorinne  A MuirheadCorinne A MuirheadSheila  MarkwardtSheila MarkwardtKelvin  D MacDonaldKelvin D MacDonald
  • Oregon Health & Science University, Portland, United States

The final, formatted version of the article will be published soon.

Background: Modulator therapy restores CFTR function and has led to health benefits for persons with CF (PwCF) including lower rates of pulmonary exacerbations. It is unknown if modulators affect lung function trajectories after inpatient treatment of pulmonary exacerbations (PEx).We conducted a retrospective review of hospital encounters for PEx for subjects 6-25 years old with mild to moderate lung disease admitted to a large tertiary care center from 2014-2021 in order to capture hospitalizations of individual PwCF before and after starting modulators. Descriptive analyses were used to characterize the population and lung function findings. Logistic regression analyses were conducted to assess the association between modulators and FEV1pp outcomes.The study sample included 575 encounters representing 149 unique PwCF. Hospital encounters of PwCF taking modulator were associated with higher mean FEV1pp at baseline, midway, discharge, and follow-up assessments. Mean FEV1pp increased during inpatient treatment of PEx with loss of lung function at follow-up regardless of modulator use. Hospital encounters of PwCF not taking modulators were associated with less significant improvements in mean FEV1pp from admission at both midway and discharge (15.6% vs. 18.3%, 19.9% vs.22.5%, no modulator vs. modulator groups respectively). At follow-up, hospitalizations of PwCF taking modulators were associated with significantly higher probability of sustained improvement in FEV1pp from discharge (difference in probabilities 0.119, p<0.05) and lower probability of loss of lung function from baseline (difference in probabilities -0.123, p<0.05).

Keywords: Lung function, Cystic Fibrosis, CFTR modulator drugs, Adolescent and young adult (AYA), Pulmonary exacerbation

Received: 26 Jun 2025; Accepted: 01 Aug 2025.

Copyright: © 2025 Stone, Haag, Muirhead, Markwardt and MacDonald. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

* Correspondence: Anne Stone, Oregon Health & Science University, Portland, United States

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