Immunization Via Mosquito Bite With Radiation-attenuated Sporozoites
Model scores of the 29,894 trials active now.
Model score 5% 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 4% of the time (217 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 2017-02-28, after 2014-01-24 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 2017-02-28. 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: infectedevidence ofmalarianonthe safety
Phrases that lowered it: healthythe investigatorlong termdrugparticipation in -
Phase: 1 (lowers risk) · Design
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Design: parallel (raises risk) · Design
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Sponsor's past termination rate: 4.7% (lowers risk) · Sponsor's track record
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Maximum age: 50 (lowers risk) · Who can join
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Number of arms: 7 (lowers risk) · Design
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Disease area, cancer: No (lowers risk) · Disease area
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Minimum age: 18 (raises risk) · Who can join
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Primary purpose: prevention (lowers risk) · Design
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Has a data monitoring committee: No (lowers risk) · Design
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Drug's FAERS reports with a death: no FAERS history (raises risk) · Drug's FDA history
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Drug's FAERS reports marked serious: no FAERS history (raises risk) · Drug's FDA history
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Sponsor type: government (raises risk) · Sponsor's track record
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Responsible party: sponsor (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
- 7 (typical: 2)
- Allocation
- randomized
- Design
- parallel
- Primary purpose
- prevention (typical: treatment)
- Blinding
- none
- Has a data monitoring committee
- No (typical: 56% yes)
- Responsible party
- sponsor
- Collaborators
- 2 (typical: 0)
- Keywords listed
- 0 (typical: 1)
Who can join
- Minimum age
- 18
- Maximum age
- 50 (typical: 71)
- Sex
- all
- Accepts healthy volunteers
- Yes (typical: 9% yes)
Sponsor's track record
- Sponsor type
- government (typical: academic or other)
- Sponsor's past trials
- 64 (typical: 32)
- Sponsor's past termination rate
- 4.7% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 13 (typical: 19)
Drug's FDA history
- Drugs with FDA adverse-event history
- 0 (typical: 1)
- Drug has FAERS history
- No (typical: 64% yes)
- Drug's FAERS reports before start
- 0 (typical: 2148)
- Drug's FAERS reports in the prior 12 months
- 0 (typical: 412.5)
- Drug's FAERS reports marked serious
- no FAERS history (typical: 85.6%)
- Drug's FAERS reports with a death
- no FAERS history (typical: 15.9%)
Disease area and drugs
- Disease areas
- infectious disease
- Drugs matched to FDA substances
- none matched
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
- Sanaria™ PfSPZ Challenge Vaccine NCT01546389 · started 2012 · scored riskier than 4% of active trials completed
- Malaria Challenge With NF54 Strain NCT00744133 · started 2009 · scored riskier than 4% of active trials completed
- Clinical Trial of the PfSPZ Vaccine NCT01001650 · started 2009 · scored riskier than 2% of active trials completed
- Safety, Tolerability and Efficacy of PfSPZ Vaccine Against Heterologous CHMI in US Malaria naïve Adults NCT04966871 · started 2021 · scored riskier than 1% of active trials completed
- PfSPZ Vaccine: Dose Optimization With Heterologous Challenge in Healthy Malaria-Naïve Adults NCT02601716 · started 2016 · scored riskier than 1% 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.