Letrozole vs Clomiphene Citrate for Induction of Ovulation in Women With Polycystic Ovarian Syndrome
Model scores of the 29,894 trials active now.
Model score 4% for any early termination, 2% for termination due to slow enrollment. Past trials like this one (phase and sponsor type, started 2008–2016) ended terminated 7% of the time (56 trials).
Finished trial that started in 2015 or later: the model never saw it during training.
How it ended
Completed on 2019-12-31, after 2016-09-30 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 2019-12-31. 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
-
Wording of the registration (title, summary, criteria) (lowers risk) · Wording
Phrases that raised it: syndromecontrolled studywomenmedicationstreatment for
Phrases that lowered it: the efficacyovarianto comparecompare thethe aim -
Accepts healthy volunteers: Yes (lowers risk) · Who can join
-
Sponsor's past termination rate: 0% (lowers risk) · Sponsor's track record
-
Disease area, cancer: Yes (raises risk) · Disease area
-
Responsible party: principal investigator (lowers risk) · Design
-
Design: parallel (raises risk) · Design
-
Drug's FAERS reports with a death: 10.1% (lowers risk) · Drug's FDA history
-
Has a data monitoring committee: Yes (raises risk) · Design
-
Minimum age: 18 (raises risk) · Who can join
-
Primary purpose: treatment (raises risk) · Design
-
Phase: 2/3 (raises risk) · Design
-
Drug's FAERS reports marked serious: 80.8% (lowers risk) · Drug's FDA history
-
Blinding: double (raises risk) · Design
-
Sponsor's past trials: 1 (lowers risk) · Sponsor's track record
-
Trials the sponsor started in the prior 2 years: 2 (raises risk) · Sponsor's track record
-
Number of arms: 2 (raises 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
- 2/3 (typical: 2)
- Number of arms
- 2
- Allocation
- randomized
- Design
- parallel
- Primary purpose
- treatment
- Blinding
- double (typical: none)
- Has a data monitoring committee
- Yes (typical: 56% yes)
- Responsible party
- principal investigator (typical: sponsor)
- Collaborators
- 0
- Keywords listed
- 4 (typical: 1)
Who can join
- Minimum age
- 18
- Maximum age
- 40 (typical: 71)
- Sex
- female (typical: all)
- Accepts healthy volunteers
- Yes (typical: 9% yes)
Sponsor's track record
- Sponsor type
- government (typical: academic or other)
- Sponsor's past trials
- 1 (typical: 32)
- Sponsor's past termination rate
- 0% (typical: 9.9%)
- Trials the sponsor started in the prior 2 years
- 2 (typical: 19)
Drug's FDA history
- Drugs with FDA adverse-event history
- 2 (typical: 1)
- Drug has FAERS history
- Yes (typical: 64% yes)
- Drug's FAERS reports before start
- 12840 (typical: 2148)
- Drug's FAERS reports in the prior 12 months
- 3347 (typical: 412.5)
- Drug's FAERS reports marked serious
- 80.8% (typical: 85.6%)
- Drug's FAERS reports with a death
- 10.1% (typical: 15.9%)
Disease area and drugs
- Disease areas
- cancer, urogenital, endocrine
- Drugs matched to FDA substances
- clomiphene, letrozole
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
- Comparison Between Letrozole and Urinary Purified FSH in Women With Clomiphene Citrate Resistant Polycystic Ovarian Syndrome. NCT02304107 · started 2013 · scored riskier than 8% of active trials completed
- The Effects of Letrozole And Clomiphene Citrate For Induction of Ovulation In Polycystic Ovarian Syndrome(PCOS) NCT01577017 · started 2008 · scored riskier than 16% of active trials completed
- Extended Clomiphene Citrate Regimen in Women With Polycystic Ovary Syndrome NCT02381184 · started 2014 · scored riskier than 16% of active trials completed
- Comparison of Clomid and Lezra With Lezra for Ovulation Induction in Clomid Resistant PCOS Case NCT06813118 · started 2024 · scored riskier than 5% of active trials completed
- Comparison Between Two Ovulation Induction Therapies and LOD on Clinical Outcomes in CC-Resistant PCOS Women NCT06486870 · started 2020 · scored riskier than 10% 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.