Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Sleep: early-phase trial registry
73 of 152 indexed Sleep trials are currently recruiting, with more weight in Phase 1-2.
Corpus placement: #74 of 28,707 conditions by registered trial count.
152 US clinical trials · 73 currently recruiting · #74 of 28,707 conditions by registered trial count
Sleep: 152 US clinical trials tracked, 73 recruiting.
Sleep is the subject of 152 registered US clinical trials on ClinicalTrials.gov, 73 of them currently open to new participants. 7 are in Phase 3-4 (later-stage) and 15 in Phase 1-2 (earlier-stage). The most active sponsor is University of Pittsburgh, running 10 of these trials.
Enrollment posture brief
Registry condition sleep
OPEN 73 | RECR 48% | LATE 7 | EARLY 15 | RANK #74 | SPON 10
Volume-matched condition peers
Nearest open-share peer: Alpha-1 Antitrypsin Deficiency (48% recruiting · 25 trials)
Sleep lists 73 open slots (48% of 152 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 Sleep 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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Sleep is recruiting above its size-band peers.
73 of 152 indexed trials (48%) are open to enrollment, against a 37.1% average across 139 conditions with 100+ trials. The peer set uses the same ClinicalTrials.gov-derived counts as this page.
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Sponsorship of Sleep trials is spread across many organizations.
University of Pittsburgh accounts for 10 of 152 trials (6.6%). 96 distinct sponsors appear on at least one study for this condition label.
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Typical Sleep enrolment sits around 80 participants.
Median target enrolment is 80 among the 152 trials that report a genuine target (sentinel values excluded). 84 of those (55.3%) plan for fewer than 100 participants.
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Sleep research is mostly interventional.
134 interventional and 18 observational studies make up this index (88.2% interventional). Study type is sponsor-reported on ClinicalTrials.gov.
Open and recent trials
152 total, page 4 of 4
The Impact of Artificial Sunlight on Human Sleep and Circadian Rhythms
VA Palo Alto Health Care System
NCT03636360
Feasibility of a Bedtime Variability Protocol
Penn State University
NCT06501690
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 1 | 7 |
| Phase 2 | 8 |
| Phase 3 | 3 |
| Phase 4 | 4 |
Top Sponsors
Named interventions
Most-linked intervention names on Sleep records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Sleep 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 Sleep page
152 registered trials, 73 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- 73 Sleep trials are currently recruiting, check eligibility criteria before contacting a site. Browse recruiting trials
- University of Pittsburgh sponsors the most Sleep trials on record, review their full trial history before evaluating a specific study. See University of Pittsburgh'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 Sleep condition card totals 152 registered trials; most-linked intervention Placebo; top US site state Pennsylvania. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.