Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT03930615 · ClinicalTrials.gov registry record · Phase 3
Extension of Letermovir (LET) From Day 100 to Day 200 Post-transplant for the Prevention of Cytomegalovirus (CMV) Infection in Hematopoietic Stem Cell Transplant (HSCT) Participants (MK-8228-040)
A Phase 3 study, sponsored by Merck Sharp & Dohme.
- Completed
- Registry status
- Phase 3
- Development phase
- 220
- Enrollment target
NCT03930615: Completed Phase 3 study, sponsored by Merck Sharp & Dohme.
NCT03930615 is a Phase 3 study that has completed, run by Merck Sharp & Dohme. The registered enrollment target is 220 participants, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (72% lower). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT03930615, a Phase 3 study, has completed, sponsored by Merck Sharp & Dohme.
- COMPLETED
- Registry status
- Phase 3
- Development phase
- 220 participants
- Enrollment target
Study Summary
The purpose of this study was to evaluate the safety and efficacy of letermovir (LET) versus placebo when cytomegalovirus (CMV) prophylaxis was extended from 100 days to 200 days post-transplant in CMV seropositive participants who received an allogenic hematopoietic stem cell transplant (HSCT). It was hypothesized that LET is superior to placebo in the prevention of clinically-significant CMV infection when LET prophylaxis is extended from 100 to 200 days.
Primary Outcome
Clinically significant CMV infection is either the onset of probable or proven CMV end-organ disease or initiation of anti-CMV preemptive therapy (PET) with approved anti-CMV agents (ganciclovir, valganciclovir, foscarnet, and/or cidofovir) based on documented CMV viremia and the clinical condition of the participant. Missing values were handled by the observed failure (OF) approach where failure was defined as all participants who develop clinically significant CMV infection or discontinue prem
Interventions
- DRUG Placebo
- DRUG Letermovir
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 220 participants |
| Start Date | 2019-06-21 |
| Est. Completion | 2022-03-16 |
| Phase | Phase 3 |
What the finished NCT03930615 record still lists
NCT03930615 is an interventional study that assigns participants to a tested intervention. The registered 220 participants enrollment target is mid-sized for trials with a published cap, below the 772-participant average among 15,282 other Phase 3 trials with a reported enrollment target (72% lower).
The record links to 0 conditions, and to 2 interventions - of which Placebo is the first listed.
NCT03930615 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT03930615 about?
NCT03930615 is a clinical study titled "Extension of Letermovir (LET) From Day 100 to Day 200 Post-transplant for the Prevention of Cytomegalovirus (CMV) Infection in Hematopoietic Stem Cell Transplant (HSCT) Participants (MK-8228-040)". The purpose of this study was to evaluate the safety and efficacy of letermovir (LET) versus placebo when cytomegalovirus (CMV) prophylaxis was extended from 100 days to 200 days post-transplant in CMV seropositive participants who received an allogenic hematopoietic stem cell transplant (HSCT). It ...
What is the current status of trial NCT03930615?
This trial is currently completed. It is a Phase 3 study. The enrollment target is 220 participants. The study started on 2019-06-21. Estimated completion is 2022-03-16.
What interventions are being tested in trial NCT03930615?
The interventions under investigation include: Placebo (DRUG), Letermovir (DRUG).
Who is sponsoring clinical trial NCT03930615?
This trial is sponsored by Merck Sharp & Dohme, which has 558 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT03930615's enrollment target sits among peer trials
220 1318th of 2000 higher than 672 of 2,000 other Phase 3 trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other Phase 3 trials. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source ClinicalTrials.gov registry export · 2026-08-08
Nationwide trials with similar profiles
Cross-condition peers matched on enrollment target and registry start date, not the same-condition list above.
Similar enrollment target
- NCT00920972 · 220 participants · Phase 1
Campath/Fludarabine/Melphalan Transplant Conditioning for Non-Malignant Diseases
- NCT01851642 · 220 participants
Lung Disease and Its Affect on the Work of White Blood Cells in the Lungs
- NCT02582021 · 220 participants
WISE CVD - Continuation (WISE HFpEF)
- NCT04067830 · 220 participants · Phase 2
Respiratory Muscle Training Before Surgery in Preventing Lung Complications in Patients With Stage I-IIIB Lung Cancer
Similar registry start date
- NCT05962346 · started 2026-12 · NA
Fetal Endoscopic Tracheal Occlusion for Congenital Diaphragmatic Hernia
- NCT07125183 · started 2026-12 · Phase 2
Study on Efficacy and Tolerability of Weekly Doxorubicin in Elderly Patients With Advanced or Metastatic Leiomyosarcoma
- NCT07292298 · started 2026-11 · Phase 2
Phase 2 Single-Arm Rectal Cancer Brachytherapy for Patients With Low-Lying Residual Adenocarcinoma After Total Neoadjuvant Therapy to Improve Organ Preservation Rates
- NCT04263285 · started 2026-10 · NA
Treatment of Depression Post-SCI