Medical Information Only. Consult your healthcare provider before considering clinical trial enrollment.
Secondhand Smoke: later-stage trial registry
A small indexed set (3 trials) with no open enrollment listed right now.
Corpus placement: #5,209 of 28,707 conditions by registered trial count.
3 US clinical trials · none currently recruiting · #5,209 of 28,707 conditions by registered trial count
Secondhand Smoke: 3 US clinical trials tracked, none currently recruiting.
Secondhand Smoke is the subject of 3 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. 1 are in Phase 3-4 (later-stage) and 0 in Phase 1-2 (earlier-stage). The most active sponsor is University of Oklahoma, running 1 of these trials.
Enrollment posture brief
Registry condition secondhand-smoke
OPEN 0 | RECR 0% | LATE 1 | EARLY 0 | RANK #5209 | SPON 1
Volume-matched condition peers
Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)
Secondhand Smoke has no open enrollment in this registry pull (3 archived studies). Peers show how other volume-matched labels compare on open share. How peer matching works →
Key findings
What ClinicalTrials.gov does not surface for Secondhand Smoke 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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Secondhand Smoke is recruiting below its size-band peers.
0 of 3 indexed trials (0%) 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.
Indexed trials (enrollment closed)
3 total, page 1 of 1
Secondhand Smoke Respiratory Health Study
University of California, San Francisco
NCT02797275
Parent eReferral to Tobacco Quitline
Children's Hospital of Philadelphia
NCT02997735
Novel Methods to Reduce Children's Secondhand Smoke Exposure II
University of Oklahoma
NCT01896518
Phase Distribution
| Phase | Trial count |
|---|---|
| Phase 4 | 1 |
Top Sponsors
Named interventions
Most-linked intervention names on Secondhand Smoke records (sponsor-reported on ClinicalTrials.gov). Counts are trial links, not unique products.
US sites by state
Facility locations filed on Secondhand Smoke 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 Secondhand Smoke page
3 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.
- No Secondhand Smoke trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
- University of Oklahoma sponsors the most Secondhand Smoke trials on record, review their full trial history before evaluating a specific study. See University of Oklahoma'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 Secondhand Smoke condition card totals 3 registered trials; most-linked intervention Tobacco lozenge; top US site state Pennsylvania. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.