Biomarkers for Circadian Timing in Healthy Adults
Public ClinicalTrials.gov record NCT03956745. 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.
Official title
Proteomic and Transcriptomic Biomarkers of Circadian Timing
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
Study investigators want to learn more about the underlying biological clock and to see if the timing of that clock can be estimated from a single blood sample.
Study identification
- NCT ID
- NCT03956745
- Recruitment status
- Terminated
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 15 participants
Conditions and interventions
Conditions
- Sleep Wake Disorders
- Sleep Disorders, Circadian Rhythm
- Sleep Disorders, Intrinsic
- Advanced Sleep Phase Syndrome (ASPS)
- Advanced Sleep Phase Syndrome
- Advanced Sleep Phase
- Delayed Sleep Phase
- Delayed Sleep Phase Syndrome
- Non-24 Hour Sleep-Wake Disorder
- Irregular Sleep-Wake Syndrome
- Shift-Work Sleep Disorder
- Shift Work Type Circadian Rhythm Sleep Disorder
- Delayed Phase Sleep Syndrome
Eligibility (public fields only)
- Age range
- 18 Years to 70 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
- May 31, 2021
- Primary completion
- Dec 30, 2023
- Completion
- Apr 29, 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 & 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 NCT03956745, 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 Sep 3, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT03956745 live on ClinicalTrials.gov.