New Approaches for Empowering Studies of Asthma in Populations of African Descent
Public ClinicalTrials.gov record NCT03937804. 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.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Background: Some groups of people have a high prevalence of asthma and allergic disease. Also, asthma and allergic disease are often found in several members of the same family. Researchers want to learn more about what factors might cause asthma, both genetic and environmental. Objective: To build a collection of information to try to find genes that cause conditions and disorders such as asthma and allergic disease. Eligibility: People ages 18 99 of self-identified African, African American, or African Caribbean descent who either have no history of asthma or wheeze or have a physician s diagnosis of asthma Design: Participants will be screened with an interview by phone or in person. Participants will fill out a questionnaire about their general health and exposure to allergens and smoke. Participants will have a physical exam. Participants will have blood tests. Participants will provide a skin cell sample. Up to two samples will be taken from the inside of the nose. A brush will be used to take the samples. Participants will have a breathing test. They will be asked to blow forcefully 3 or more times into a lung function machine. Participants may have their blood and skin samples sent to a lab. DNA will be extracted from the samples and tested. Participants blood and skin samples will be stored. Samples may be used in future research studies.
Study identification
- NCT ID
- NCT03937804
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 83 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 18 Years to 115 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
- Sep 22, 2019
- Primary completion
- Jul 14, 2021
- Completion
- Nov 14, 2021
- Last update posted
- Aug 31, 2026
2019 – 2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| National Institutes of Health Clinical Center | Bethesda | Maryland | 20892 | — |
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 NCT03937804, 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 Aug 31, 2026 · Synced Sep 4, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03937804 live on ClinicalTrials.gov.