A Study on the Immune Response and Safety of a Combined Vaccine Against Diphtheria, Tetanus and Acellular Pertussis (dTpa) in Healthy Japanese Adolescents Aged 11 Years to <13 Years
Model scores of the 29,894 trials active now.
Model score 3% for any early termination, 0% for termination due to slow enrollment. Past trials like this one (phase, sponsor type and disease area, started 2008–2016) ended terminated 10% of the time (1,463 trials).
Finished trial that started in 2015 or later: the model never saw it during training.
How it ended
Completed on 2026-09-04, after 2026-06-29 start.
The score above never used this outcome: finished trial that started in 2015 or later: the model never saw it during training.
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 2026-09-04. 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
-
Wording of the registration (title, summary, criteria) (lowers risk) · Wording
Phrases that raised it: japaneseconcurrentperformance11purpose
Phrases that lowered it: participantsvaccineparticipanthealthyvaccination -
Accepts healthy volunteers: Yes (lowers risk) · Who can join
-
Primary purpose: prevention (lowers risk) · Design
-
Sponsor's past trials: 2864 (raises risk) · Sponsor's track record
-
Phase: 3 (lowers risk) · Design
-
Design: single group (raises risk) · Design
-
Trials the sponsor started in the prior 2 years: 96 (lowers risk) · Sponsor's track record
-
Sponsor type: industry (lowers risk) · Sponsor's track record
-
Has a data monitoring committee: No (lowers risk) · Design
-
Drug's FAERS reports with a death: no FAERS history (raises risk) · Drug's FDA history
-
Disease area, cancer: No (lowers risk) · Disease area
-
Drug's FAERS reports marked serious: no FAERS history (raises risk) · Drug's FDA history
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
- 1 (typical: 2)
- Allocation
- non randomized (typical: randomized)
- Design
- single group (typical: parallel)
- Primary purpose
- prevention (typical: treatment)
- Blinding
- none
- Has a data monitoring committee
- No (typical: 56% yes)
- Responsible party
- sponsor
- Collaborators
- 0
- Keywords listed
- 5 (typical: 1)
Who can join
- Minimum age
- 11 (typical: 18)
- Maximum age
- 12 (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
- 2864 (typical: 32)
- Sponsor's past termination rate
- 7.7% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 96 (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
- none of the 14 tracked areas
- 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
- Evaluation of Immunogenicity, Safety and Reactogenicity of GSK Biologicals' Boostrix Vaccine Administered as a Booster Dose in Healthy Russian Subjects NCT03311659 · started 2018 · scored riskier than 1% of active trials completed
- Study of SP306 Given Intramuscularly Compared to DT Given Subcutaneously in Japanese Adolescents 11 - 12 Years Old NCT02089347 · started 2014 · scored riskier than 0% of active trials completed
- Safety and Dose Ranging Study of Acellular Pertussis and Acellular Pertussis -Tetanus-Diphtheria Booster Vaccines in Healthy Adults Ages 18 to 40 Years NCT01529645 · started 2012 · scored riskier than 1% of active trials completed
- A Study to Describe the Safety Profile and Compare the Immune Response of 4 Different Formulations of an Investigational Tdap Vaccine When Compared to Licensed Tdap Vaccine in Young Adults in Canada NCT03958799 · started 2019 · scored riskier than 1% of active trials completed
- The PertADO Geneva Trial NCT02946190 · started 2016 · scored riskier than 2% 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.