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ClinicalTrials.gov enrollment closed small index

Head Start Participation clinical trials

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.

Browse conditions → How counts are built

3 US clinical trials · none currently recruiting · #5,209 of 28,707 conditions by registered trial count

Head Start Participation: 3 US clinical trials tracked, none currently recruiting.

Head Start Participation is the subject of 3 registered US clinical trials on ClinicalTrials.gov, none currently recruiting. The most active sponsor is Mathematica Policy Research, running 3 of these trials.

Enrollment posture brief

Registry condition head-start-participation

OPEN 0 | RECR 0% | LATE 0 | EARLY 0 | RANK #5209 | SPON 3

Volume-matched condition peers

Nearest open-share peer: Accelerated Phase Chronic Myelogenous Leukemia (0% recruiting · 12 trials)

Ablation80%ACL Reconstruction80%Abuse, Drug60%Acceptability60%Head Start Participation (th…0%
Open-enrollment share among volume-matched conditions near Head Start Participation

Head Start Participation 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 Head Start Participation 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.

  1. Head Start Participation 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.

Phase Distribution

Phase data not available

Top Sponsors

Mathematica Policy Research 3 trials

US sites by state

Facility locations filed on Head Start Participation trials. A trial with sites in several states counts in each.

District of Columbia 3 trials

Source: ClinicalTrials.gov, National Library of Medicine. Data is informational only.

Related

Read our methodology - how this data is sourced, computed, and verified.

What to do with this Head Start Participation page

3 registered trials, 0 currently recruiting, is a starting point for a conversation, not a diagnosis or a recommendation.

  • No Head Start Participation trials are currently recruiting in this registry; that can change as new trials post, or check the broader research index. Browse research indexes
  • Mathematica Policy Research sponsors the most Head Start Participation trials on record, review their full trial history before evaluating a specific study. See Mathematica Policy Research'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 Head Start Participation condition card totals 3 registered trials; top US site state District of Columbia. See our editorial standards & corrections policy, the methodology behind these numbers, the data changelog, or report a data error.