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Trial · NCT02347657

Registered outcomes11

Each outcome the trial registered, primary first, in ClinicalTrials.gov's words.

ListOutcomeTime frameDescription
PrimaryAbsolute Change From Baseline (Day 1) in Percent Predicted Forced Expiratory Volume in 1 Second (ppFEV1) Through Week 24Day 1, Through Week 24FEV1 is the volume of air that can forcibly be blown out in one second, after full inspiration.
SecondaryRelative Change From Baseline (Day 1) in ppFEV1 Through Week 24Day 1, Through Week 24FEV1 is the volume of air that can forcibly be blown out in one second, after full inspiration.
SecondaryNumber of Pulmonary Exacerbations Per YearDay 1 through Week 24
Pulmonary exacerbation was defined as a new event or change in antibiotic therapy for greater than or equal to 4 sinopulmonary signs/symptoms. Pulmonary exacerbation events per year (48 weeks) were reported.
SecondaryAbsolute Change From Baseline (Day 1) Body Mass Index (BMI) at Week 24Day 1, Week 24BMI was defined as weight in kilograms (kg) divided by height in square meter (m\^2).
SecondaryAbsolute Change From Baseline (Day 1) in Cystic Fibrosis Questionnaire-Revised (CFQ-R) Respiratory Domain Score Through Week 24Day 1, Through Week 24
The CFQ-R is a validated participant-reported outcome measuring health-related quality of life for participants with cystic fibrosis. Respiratory domain assessed respiratory symptoms, score range: 0-100; higher scores indicating fewer symptoms and better health-related quality of life.
SecondaryNumber of Participants With Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs)Day 1 up to Week 28
AE: any untoward medical occurrence in a participant during the study; the event does not necessarily have a causal relationship with the treatment. This includes any newly occurring event or previous condition that has increased in severity or frequency after the informed consent form is signed. AE includes serious as well as non-serious AEs. SAE (subset of AE): medical event or condition, which falls into any of the following categories, regardless of its relationship to the study drug: death, life threatening adverse experience, inpatient hospitalization/prolongation of hospitalization, persistent/significant disability or incapacity, congenital anomaly/birth defect, important medical event. Any AE that increased in severity or newly developed at or after initial dosing of study drug to Week 28 was considered treatment-emergent.
SecondaryNumber of Participants With at Least One Pulmonary Exacerbation Pulmonary Exacerbation Through Week 24Day 1 through Week 24
Pulmonary exacerbation was defined as a new event or change in antibiotic therapy for greater than or equal to 4 sinopulmonary signs/symptoms. Time to event data was not collected and instead, Number of Subjects with first event were collected and are reported. Time-to-first pulmonary exacerbation was planned to be estimated using Kaplan-Meier (KM) estimates. However, due to less than 50% of events, time-to-first event data was not estimated. Instead, number of participants with at least one pulmonary exacerbation event were collected and are reported.
SecondaryAbsolute Change From Baseline (Day 1) in Sweat Chloride Through Week 24Day 1, Through Week 24Sweat samples were collected using an approved collection device.
SecondaryAbsolute Change From Baseline (Day 1) in BMI Z-score at Week 24 in Participants Less Than (<) 20 Years Old at the Time of Screening)Day 1, Week 24
BMI was defined as weight in kg divided by height in m\^2. z-score is a statistical measure to describe whether a mean was above or below the standard. BMI, adjusted for age and sex, was analyzed as BMI-for-age z-score (BMI z-score).
SecondaryAbsolute Change From Baseline (Day 1) in Body Weight at Week 24Day 1, Week 24
SecondaryTrough Plasma Concentrations (Ctrough) of VX-661, VX-661 Metabolites (M1 VX-661 and M2-VX-661), Ivacaftor (IVA) and IVA Metabolite (M1-IVA)Pre-morning dose on Week 16This outcome was not planned to be assessed in Placebo arm.

Source ClinicalTrials.govtrials-2026-11-12-0.5.0

Sources 3

  • ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
  • ClinicalTrials.govNo license stated
  • NIH RePORTER's clinical studies and project filesPublic domain
Each source's terms
  • ClinicalTrials.gov's posted results, through CTTI's AACTClinicalTrials.gov data via Aggregate Analysis of ClinicalTrials.gov (AACT), CTTI. CTTI makes its materials freely available and requests acknowledgement. https://aact.ctti-clinicaltrials.org/documentation/299
  • ClinicalTrials.govnone stated
  • NIH RePORTER's clinical studies and project filesPublic domain (NIH RePORTER)

ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions.

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