Effects of Psilocybin on Behavior, Psychology and Brain Function in Long-term Meditators
Model scores of the 29,894 trials active now.
Model score 7% for any early termination, 1% for termination due to slow enrollment. Past trials like this one (phase, sponsor type and disease area, started 2008–2016) ended terminated 11% of the time (918 trials).
Finished trial that started 2008–2014: scored by a model trained without any trial from its start year, so its own outcome was never used.
How it ended
Completed on 2019-12-26, after 2014-05-31 start.
The score above never used this outcome: finished trial that started 2008–2014: scored by a model trained without any trial from its start year, so its own outcome was never used.
Termination over time, as the model saw it at the start
Cumulative chance of ending terminated (red) or completed (green) by each year from its start; it actually ended on 2019-12-26. The rest of the way to 100% is still running.
From the competing-risks survival model (termination vs completion, still-running trials censored), fit to trials that started 2008–2014 and recalibrated to termination rates over 2022–2024, since termination has become more common. Checked on past years, it still ran a little low when the rise continued.
What moved the score
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Accepts healthy volunteers: Yes (lowers risk) · Who can join
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Wording of the registration (title, summary, criteria) (lowers risk) · Wording
Phrases that raised it: dsm ivschizophreniacardiaciidisorder
Phrases that lowered it: termhealthyparticipantsdrugparticipant -
Sponsor's past termination rate: 15.0% (raises risk) · Sponsor's track record
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Phase: 1 (lowers risk) · Design
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Minimum age: 25 (lowers risk) · Who can join
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Sponsor type: academic or other (raises risk) · Sponsor's track record
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Maximum age: 80 (raises risk) · Who can join
-
Has a data monitoring committee: Yes (raises risk) · Design
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Design: parallel (raises risk) · Design
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Trials the sponsor started in the prior 2 years: 125 (lowers risk) · Sponsor's track record
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Disease area, cancer: No (lowers risk) · Disease area
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Keywords listed: 6 (lowers risk) · Design
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Drug's FAERS reports with a death: 0% (lowers risk) · Drug's FDA history
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Drug's FAERS reports marked serious: 100% (raises risk) · Drug's FDA history
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Disease area, psychiatry: No (lowers risk) · Disease area
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Sponsor's past trials: 307 (lowers risk) · Sponsor's track record
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Primary purpose: basic science (lowers risk) · Design
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Number of arms: 4 (lowers risk) · Design
Every input that moved this score, largest first: SHAP contributions in log-odds, red raising risk and green lowering it. They describe the model, not causes of termination. Phrases are traced from the text features back to this registration's words, approximately.
The trial
Design
- Phase
- 1 (typical: 2)
- Number of arms
- 4 (typical: 2)
- Allocation
- randomized
- Design
- parallel
- Primary purpose
- basic science (typical: treatment)
- Blinding
- double (typical: none)
- Has a data monitoring committee
- Yes (typical: 56% yes)
- Responsible party
- sponsor
- Collaborators
- 0
- Keywords listed
- 6 (typical: 1)
Who can join
- Minimum age
- 25 (typical: 18)
- Maximum age
- 80 (typical: 71)
- Sex
- all
- Accepts healthy volunteers
- Yes (typical: 9% yes)
Sponsor's track record
- Sponsor type
- academic or other
- Sponsor's past trials
- 307 (typical: 32)
- Sponsor's past termination rate
- 15.0% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 125 (typical: 19)
Drug's FDA history
- Drugs with FDA adverse-event history
- 1
- Drug has FAERS history
- Yes (typical: 64% yes)
- Drug's FAERS reports before start
- 1 (typical: 2148)
- Drug's FAERS reports in the prior 12 months
- 1 (typical: 412.5)
- Drug's FAERS reports marked serious
- 100% (typical: 85.6%)
- Drug's FAERS reports with a death
- 0% (typical: 15.9%)
Disease area and drugs
- Disease areas
- none of the 14 tracked areas
- Drugs matched to FDA substances
- dimethyltryptamine, psilocybin
Typical values are among the trials active now. Sponsor and drug history are counted only up to this trial's start date.
Similar finished trials
- Pilot Study: Effects of Psilocybin on Behavior, Psychology and Brain Function in Long-term Meditators NCT01988311 · started 2013 · scored riskier than 8% of active trials completed
- Effects of Psilocybin in Major Depressive Disorder NCT03181529 · started 2017 · scored riskier than 33% of active trials completed
- Effects of Psilocybin-facilitated Experience on the Psychology and Effectiveness of Professional Leaders in Religion NCT02243813 · started 2015 · scored riskier than 6% of active trials completed
- Psilocybin and Spiritual Practice NCT00802282 · started 2009 · scored riskier than 7% of active trials completed
- Psilocybin Brain Stimulation and Imaging Pilot Study NCT06835699 · started 2025 · scored riskier than 8% of active trials completed
Closest by meaning of the registration text (PubMedBERT embeddings), among finished trials. How they ended is context, not an input to this trial's score.