Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Delayed Sleep Phase Syndrome: later-stage trial registry
3 of 3 indexed Delayed Sleep Phase Syndrome trials are currently recruiting, with more weight in Phase 3-4.
Corpus placement: #5,209 of 28,707 conditions by registered trial count.
3 US clinical trials · 3 currently recruiting · #5,209 of 28,707 conditions by registered trial count
Delayed Sleep Phase Syndrome: 3 US clinical trials tracked, 3 recruiting.
Delayed Sleep Phase Syndrome is the subject of 3 registered US clinical trials on ClinicalTrials.gov, 3 of them currently open to new participants. 1 are in Phase 3-4 (later-stage) and 0 in Phase 1-2 (earlier-stage). The most active sponsor is University of Colorado, Boulder, running 1 of these trials.
Enrollment posture brief
Registry condition delayed-sleep-phase-syndrome
OPEN 3 | RECR 100% | LATE 1 | EARLY 0 | RANK #5209 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Aortic Arch Aneurysm (100% recruiting · 5 trials)
Delayed Sleep Phase Syndrome lists 3 open slots (100% of 3 indexed trials). Peers are matched on registered volume, not therapeutic-area browse lists. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Delayed Sleep Phase Syndrome on its own pages , computed from the registry mirror as of 2026-08-08. Each line carries its own denominator so it can be quoted as it stands.
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Delayed Sleep Phase Syndrome is recruiting above its size-band peers.
3 of 3 indexed trials (100%) are open to enrollment, against a 46.5% average across 27,806 conditions with fewer than 20 trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
Open and recent trials
3 total, page 1 of 1
Experimental Manipulation of Sleep and Circadian Rhythms and the Role Played on Reward Function in Teens
University of Pittsburgh
NCT04792697
Pathophysiology of Circadian Rhythm Delayed Sleep Wake Phase Disorder
University of Colorado, Boulder
NCT06471374
Lemborexant in Delayed Sleep Phase Syndrome
University of California, San Francisco
NCT06874855
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Delayed Sleep Phase Syndrome records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Delayed Sleep Phase Syndrome trials. A trial with sites in several states counts in each.
Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.
Related
What to do with this Delayed Sleep Phase Syndrome page
3 registered trials, 3 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 3 Delayed Sleep Phase Syndrome trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- University of Colorado, Boulder sponsors the most Delayed Sleep Phase Syndrome trials on record, review their full trial history before evaluating a specific study. See University of Colorado, Boulder's trials
- Bring the specific trial ID (NCT number) to your own doctor before enrolling, this page is a directory, not medical guidance. Read the trial-finding guide
Trial and recruiting counts reflect ClinicalTrials.gov registry status as of the data vintage above; individual trial eligibility and enrollment status can change.
Every figure on PlainTrial is rendered directly from the ClinicalTrials.gov registry, no number is typed in by an editor. This Delayed Sleep Phase Syndrome condition card totals 3 registered trials; most-linked intervention Light sensitivity assessment; top US site state Pennsylvania. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.