Breath Biomarkers for Sleep Loss and Circadian Timing
Public ClinicalTrials.gov record NCT03980340. 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
- NCT03980340
- Recruitment status
- Terminated
- Study type
- Observational
- Phase
- Not listed
- Lead sponsor
- Brigham and Women's Hospital
- Other
- Enrollment
- 5 participants
Conditions and interventions
Conditions
- Advanced Sleep Phase
- Advanced Sleep Phase Syndrome
- Advanced Sleep Phase Syndrome (ASPS)
- Delayed Sleep Phase
- Delayed Sleep Phase Syndrome
- Irregular Sleep-Wake Syndrome
- Non-24 Hour Sleep-Wake Disorder
- Shift Work Type Circadian Rhythm Sleep Disorder
- Shift-Work Sleep Disorder
- Sleep Disorders, Circadian Rhythm
- Sleep Disorders, Intrinsic
Interventions
- No Nap Intervention Behavioral
- Short Nap Intervention Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 18 Years to 50 Years
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jan 27, 2021
- Primary completion
- Jan 30, 2025
- Completion
- Mar 30, 2025
- Last update posted
- Aug 2, 2025
2021 – 2025
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Brigham and Women's Hospital | Boston | Massachusetts | 02115 | — |
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 NCT03980340, 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 2, 2025 · Synced May 20, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03980340 live on ClinicalTrials.gov.