A Prospective Observational Study of Biopredictors of Bronchial Thermoplasty Response in Patients With Severe Refractory Asthma (BTR Study)
Public ClinicalTrials.gov record NCT01185275. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Study identification
- NCT ID
- NCT01185275
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- Washington University School of Medicine
- Other
- Enrollment
- 133 participants
Conditions and interventions
Conditions
Interventions
- Alair system Device
Device
Eligibility (public fields only)
- Age range
- 18 Years to 65 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 31, 2010
- Primary completion
- Sep 30, 2019
- Completion
- Sep 30, 2019
- Last update posted
- Nov 26, 2020
2010 – 2019
United States locations
- U.S. sites
- 8
- U.S. states
- 8
- U.S. cities
- 8
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Alabama at Birmingham | Birmingham | Alabama | — | — |
| University of Arizona | Tucson | Arizona | — | — |
| National Jewish Health | Denver | Colorado | 80206 | — |
| University of Chicago | Chicago | Illinois | 60637 | — |
| Louisiana State University Health Sciences Center in New Orleans | New Orleans | Louisiana | 70112 | — |
| Washington University School of Medicine | St Louis | Missouri | 63110 | — |
| Creighton University | Omaha | Nebraska | — | — |
| Cleveland Clinic | Cleveland | Ohio | 44195 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT01185275, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Nov 26, 2020 · Synced May 15, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT01185275 live on ClinicalTrials.gov.