Comparison · NCT02347657-e8260e6a
VX-661/IVA vs Placebo: Number of Participants With at Least One Pulmonary Exacerbation Pulmonary Exacerbation Through Week 24
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
2 sourcestrial-comparisons-2026-03-23-0.1.0
Cite this record
ConductScience Library. VX-661/IVA vs Placebo: Number of Participants With at Least One Pulmonary Exacerbation Pulmonary Exacerbation Through Week 24. Trial comparisons, record NCT02347657-e8260e6a. Release trial-comparisons-2026-03-23-0.1.0, 23 Mar 2026. https://conductscience.org/library/comparisons/NCT02347657-e8260e6a
On this page
Measures6
Calculated by ConductScience from the counts the trial posted to ClinicalTrials.gov.
| Measure | Value | 95% interval, lower | 95% interval, upper | Method | Note |
|---|---|---|---|---|---|
| Risk in group 1 | 0.25 | 0.2 | 0.307 | wilson | |
| Risk in group 2 | 0.344 | 0.288 | 0.404 | wilson | |
| Risk difference, group 1 minus group 2 | -0.0938 | -0.172 | -0.0139 | newcombe hybrid score | |
| Risk ratio, group 1 over group 2 | 0.727 | 0.553 | 0.957 | log | |
| Odds ratio, group 1 over group 2 | 0.636 | 0.433 | 0.936 | log | |
| Number needed to treat, for one fewer participant with the outcome on VX-661/IVA than on Placebo | 10.7 | 5.82 | 72 | from the risk difference interval |
Source ClinicalTrials.gov
Groups2
Group 2 names the comparator: placebo.
| Group | Title | Description | With the outcome | Analysed | ClinicalTrials.gov code |
|---|---|---|---|---|---|
| Group 1 | VX-661/IVA | VX-661 100 mg plus IVA 150 mg FDC tablet administered orally in the morning and IVA 150 mg tablet administered orally in the evening up to Week 24. | 62 | 248 | OG001 |
| Group 2 | Placebo | Placebo matched to VX-661 plus IVA FDC tablet administered orally in the morning and placebo matched to IVA tablet administered orally in the evening up to Week 24. | 88 | 256 | OG000 |
Source ClinicalTrials.gov
Outcome
- Type
- SECONDARY
- Title
- Number of Participants With at Least One Pulmonary Exacerbation Pulmonary Exacerbation Through Week 24
- Description
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.
- Time frame
- Day 1 through Week 24
- Population
- FAS included all randomized participants who carry the intended CFTR allele mutation and have received at least 1 dose of study drug.
Source ClinicalTrials.gov
Trial
- Title
- A Randomized, Double-Blind, Placebo-Controlled, Parallel-Group Study to Evaluate the Efficacy and Safety of VX-661 in Combination With Ivacaftor
- NCT number
- NCT02347657
- Phases
- PHASE3
- Conditions
- Cystic Fibrosis
- Interventions
- VX-661 Plus Ivacaftor Combination, Ivacaftor, VX-661 Plus Ivacaftor Combination Placebo, Ivacaftor placebo
- Lead sponsor
- Vertex Pharmaceuticals Incorporated
- Results first posted
- 2018-06-12
- Results on ClinicalTrials.gov
- https://clinicaltrials.gov/study/NCT02347657?tab=results
Source ClinicalTrials.gov
Source
- Release
- trial-comparisons-2026-03-23-0.1.0
- Release manifest SHA-256
- f66225897fbf258b57ea10bdacfd0347d3cdfda93f7f5685234b7e06ea36fa57
- AACT copy
- 2026-03-23
- Tables read
- outcome_counts.parquet, outcome_measurements.parquet, outcomes.parquet, reported_event_totals.parquet, reported_events.parquet, result_groups.parquet, studies.parquet, ctgov_trial.parquet
Source ClinicalTrials.gov
Sources 2
- ClinicalTrials.gov's posted results, through CTTI's AACTFreely available. Acknowledgement requested
- ClinicalTrials.govNo license stated
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
ClinicalTrials.gov's data carry an international copyright outside the United States: https://clinicaltrials.gov/about-site/terms-conditions. The measures are ConductScience's calculation from them.
For software
Read this comparison from software.
The record is JSON. No key.
GET https://conductscience.org/api/comparisons/v1/NCT02347657-e8260e6a