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Pediatr Pulmonol ; 59(5): 1449-1453, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38415920

RESUMEN

BACKGROUND: Elexacaftor in combination with Tezacaftor and Ivacaftor (ETI) became licensed in the United Kingdom in early 2022 for children aged 6-11 years with cystic fibrosis (CF) and an eligible mutation. Many in this age group have excellent prior lung health making quantitative measurement of benefit challenging. Clinical trials purport that lung clearance index (LCI2.5) measurement is most suitable for this purpose. OBJECTIVES: This study aimed to understand the clinical utility of LCI2.5 in detecting change after commencing ETI in the real world. PATIENT SELECTION/METHODS: Baseline anthropometric data were collected along with spirometry (forced expiratory volume in 1 s [FEV1], forced vital capacityFV and LCI2.5 measures in children aged 6-11 years with CF before starting ETI. Measures were repeated after a mean (range) of 8.2 (7-14) months of ETI treatment. The primary endpoint was a change in LCI2.5, with secondary endpoints including change in FEV1 and change in body mass index (BMI) also reported. RESULTS: Twelve children were studied (seven male, mean age 9.5 years at baseline). Our study population had a mean (SD) LCI2.5 of 7.01 (1.14) and FEV1 of 96 (13) %predicted at baseline. Mean (95% confidence interval) changes in LCI2.5 [-0.7 (-1.4, 0), p = .06] and BMI [+0.7 (+0.1, +1.3), p = .03] were observed, along with changes in FEV1 of +3.1 (-1.9, +8.1) %predicted. CONCLUSIONS: Real-world changes in LCI2.5 (-0.7) are different to those reported in clinical trials (-2.29). Lower baseline LCI2.5 as a result of prior modulator exposure, high baseline lung health, and new LCI2.5 software analyses all contribute to lower LCI2.5 values being recorded in the real world of children with CF.


Asunto(s)
Aminofenoles , Benzodioxoles , Fibrosis Quística , Combinación de Medicamentos , Indoles , Pirrolidinas , Quinolonas , Humanos , Fibrosis Quística/tratamiento farmacológico , Fibrosis Quística/fisiopatología , Niño , Masculino , Femenino , Aminofenoles/uso terapéutico , Quinolonas/uso terapéutico , Indoles/uso terapéutico , Volumen Espiratorio Forzado/efectos de los fármacos , Benzodioxoles/uso terapéutico , Piridinas/uso terapéutico , Pirazoles/uso terapéutico , Pulmón/fisiopatología , Pulmón/efectos de los fármacos , Pirroles/uso terapéutico , Capacidad Vital/efectos de los fármacos , Espirometría , Agonistas de los Canales de Cloruro/uso terapéutico
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