About this trial
This is a prospective, observational study examining the impact of highly effective cystic fibrosis transmembrane conductance regulator (CFTR) modulators on chronic rhinosinusitis (CRS) and olfactory dysfunction (OD) in young children with cystic fibrosis (YCwCF). This study involves two groups: children 2-8 years old, inclusive at initial visit, receiving highly effective modulator therapy (HEMT), and a control group of children 2-8 years old, inclusive at initial visit, not receiving HEMT. Outcomes will include sinus magnetic resonance imaging (MRI) scans, olfactory tests, and quality of life surveys obtained over a two-year period.
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Children with documentation of a CF diagnosis
Age 2-8 years old at first study visit
CFTR mutation consistent with FDA labeled indication of highly effective modulator therapy (ivacaftor or elexacaftor/tezacaftor/ivacaftor)
Clinician intent to prescribe ivacaftor or ETI so that enrollment is before start of HEMT
Disqualifiers
Use of an investigational drug within 28 days prior to the first study visit
Use of ivacaftor or elexacaftor/tezacaftor/ivacaftor within the 180 days prior to and including the first study visit
Use of chronic oral corticosteroids within the 28 days prior to and including the first study visit.
Sinus surgery within 180 days prior to the first study visit
Trial population
Participants for this study will be enrolled into one of two groups. The first group (HEMT Group) will enroll children between 2-8 years of age who have a clinical intent to initiate HEMT, which is defined as ivacaftor or elexacaftor/tezacaftor/ivacaftor based on underlying CFTR mutation status. The second group (non-HEMT Group) will consist of children under the age of 8 without intent to clinically initiate HEMT. Children for both groups will be identified and recruited from cystic fibrosis clinics.
Trial design
Cohort
Prospective
Treatments tested in this trial
Ivacaftor or elexacaftor/tezacaftor/ivacaftor
DrugHEMT's are prescribed at the discretion of the treating physician and is not dictated by the principal investigator of this study.
Treatment groups
Trial outcomes
Primary outcomes
Change in MRI sinus opacification
Measurement involves calculating percent total sinus opacification (%) using MRI, where sinus contents are differentiated into air and soft tissue/fluid.
Change in olfactory bulb volume
Assessment includes segmenting the olfactory bulb on consecutive coronal slices using MRI, then combining these into a 3-dimensional region. The volume of this region is then calculated in cubic millimeters (mm3).
Secondary outcomes
Change in Pediatric Smell Wheel (PSW) Scores
The PSW test involves children identifying microencapsulated odorants. The score (Range: 0-11) is based on the number of correctly identified smells, with higher scores indicating better olfactory function.
Olfactory Cleft Opacification
Olfactory cleft opacification is quantified by segmenting the olfactory cleft on MRI and applying pixel intensity thresholds to calculate the percentage (%) of opacification.
Change in Brief Questionnaire of Olfactory Disorders (BQOD) Scores
This BQOD is a parent-completed survey for assessing olfactory-specific quality of life (QOL). The survey scores (Range: 0-21) quantify the degree of olfactory QOL impairment, with higher scores indicating greater olfactory QOL impairment.
Change in Sinus and Nasal Quality of Life Survey (SN-5) - Symptom Frequency Domains
SN-5 is a parent-completed survey assessing sinus symptoms and QOL in children. It captures sinus infections, nasal obstruction, allergy symptoms, emotional distress, activity limitations, and overall QOL. For the first five symptom domain questions, scores range 1-7 for each domain, higher scores indicating higher frequency at which symptom affected patient over the past 4 weeks.
Sponsors and contacts
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University of California, Los Angeles
Lead sponsor
University of Kansas Medical Center
Collaborator
Children's Hospital Medical Center, Cincinnati
Collaborator
University of Iowa
Collaborator
University of Virginia
Collaborator
University of Vermont
Collaborator
University of North Carolina, Chapel Hill
Collaborator
Children's Hospital Colorado
Collaborator