Immunogenicity Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) to Prevent Culture Confirmed Influenza Infection
Model scores of the 29,894 trials active now.
Model score 2% 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 6% of the time (876 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 2009-06-30, after 2008-12-31 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 2009-06-30. 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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Wording of the registration (title, summary, criteria) (lowers risk) · Wording
Phrases that raised it: cellsubject hasriskentrysubject is
Phrases that lowered it: vaccineinfluenzavaccinationthe efficacystudy -
Accepts healthy volunteers: Yes (lowers risk) · Who can join
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Sponsor's past termination rate: 0% (lowers risk) · Sponsor's track record
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Primary purpose: prevention (lowers risk) · Design
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Has a data monitoring committee: Yes (raises risk) · Design
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Phase: 3 (lowers risk) · Design
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Design: parallel (raises risk) · Design
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Maximum age: 49 (lowers risk) · Who can join
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Disease area, cancer: No (lowers risk) · Disease area
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Trials the sponsor started in the prior 2 years: 9 (lowers risk) · Sponsor's track record
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Sponsor type: industry (lowers risk) · Sponsor's track record
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Minimum age: 18 (raises risk) · Who can join
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Drug's FAERS reports marked serious: no FAERS history (raises risk) · Drug's FDA history
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Sponsor's past trials: 6 (lowers risk) · Sponsor's track record
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
- 3 (typical: 2)
- Number of arms
- 2
- Allocation
- randomized
- Design
- parallel
- Primary purpose
- prevention (typical: treatment)
- Blinding
- double (typical: none)
- Has a data monitoring committee
- Yes (typical: 56% yes)
- Responsible party
- sponsor
- Collaborators
- 0
- Keywords listed
- 0 (typical: 1)
Who can join
- Minimum age
- 18
- Maximum age
- 49 (typical: 71)
- Sex
- all
- Accepts healthy volunteers
- Yes (typical: 9% yes)
Sponsor's track record
- Sponsor type
- industry (typical: academic or other)
- Sponsor's past trials
- 6 (typical: 32)
- Sponsor's past termination rate
- 0% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 9 (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, respiratory
- 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
- Immunogenicity and Safety Study of an Inactivated Influenza Vaccine (Split Virus, Vero Cell Derived) in Adults Aged 50 Years and Older NCT00782431 · started 2008 · scored riskier than 0% of active trials completed
- Adult Safety Study of 2009/2010 Seasonal Influenza Vaccine NCT01063088 · started 2010 · scored riskier than 1% of active trials completed
- Yearly Strain Variation Study, 2010/2011 NCT01157702 · started 2010 · scored riskier than 1% of active trials completed
- Efficacy, Safety, and Immunogenicity of a Plant-Derived Quadrivalent Virus-Like Particles (VLPs) Influenza Vaccine in Adults NCT03301051 · started 2017 · scored riskier than 0% of active trials completed
- Safety and Immunogenicity of an A (H1N1) 2009 Influenza Virus-like Particle (VLP) Vaccine NCT01072799 · started 2009 · 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.