A Study of Different Formulations of an Adjuvanted A/H1N1 Pandemic Vaccine in Healthy Adults and the Elderly
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 8% of the time (780 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 2011-03-31, after 2009-10-31 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 2011-03-31. 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: gradetherapycancerchemotherapystage
Phrases that lowered it: vaccinevaccinationhealthyinfluenzareceipt -
Accepts healthy volunteers: Yes (lowers risk) · Who can join
-
Phase: 2 (raises risk) · Design
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Sponsor's past termination rate: 12.8% (raises risk) · Sponsor's track record
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Primary purpose: prevention (lowers risk) · Design
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Number of arms: 5 (lowers risk) · Design
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Sponsor type: industry (lowers risk) · Sponsor's track record
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Has a data monitoring committee: No (lowers risk) · Design
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Design: parallel (raises risk) · Design
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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: 199 (lowers risk) · Sponsor's track record
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Disease area, respiratory: Yes (raises risk) · Disease area
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Drug's FAERS reports with a death: no FAERS history (raises risk) · Drug's FDA history
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Blinding: quadruple (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
- 2
- Number of arms
- 5 (typical: 2)
- Allocation
- randomized
- Design
- parallel
- Primary purpose
- prevention (typical: treatment)
- Blinding
- quadruple (typical: none)
- Has a data monitoring committee
- No (typical: 56% yes)
- Responsible party
- sponsor
- Collaborators
- 0
- Keywords listed
- 1
Who can join
- Minimum age
- 18
- Maximum age
- not given (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
- 452 (typical: 32)
- Sponsor's past termination rate
- 12.8% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 199 (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
- A Study of Different Formulations of an A/H1N1 Pandemic Vaccine in Healthy Adults and the Elderly NCT00953524 · started 2009 · scored riskier than 0% of active trials completed
- A Study of Different Formulations of an A/H1N1 Pandemic Vaccine in Healthy Children Aged 6 Months to 9 Years NCT00952419 · started 2009 · scored riskier than 1% of active trials completed
- Study of Different Formulations of an Intramuscular A/H5N1 Inactivated, Split Virion Influenza Adjuvanted Vaccine NCT00664417 · started 2008 · scored riskier than 1% of active trials completed
- A Study of Swine-origin A/H1N1 Influenza Vaccines in Healthy European Adults and the Elderly NCT00954798 · started 2009 · scored riskier than 0% of active trials completed
- Study of Swine-Origin A/H1N1 Influenza Non-Adjuvanted Vaccine in Healthy Adults in India NCT01053143 · started 2010 · 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.