Medical Information Only. Always consult your healthcare provider before enrolling in any clinical trial.
NCT04981392 · ClinicalTrials.gov registry record · NA
Trusted Messengers: Intervention to Promote COVID-19 Vaccination
A NA study, sponsored by University of Massachusetts, Worcester.
- Completed
- Registry status
- NA
- Development phase
- 21,844
- Enrollment target
NCT04981392: Completed NA study, sponsored by University of Massachusetts, Worcester.
NCT04981392 is a NA study that has completed, run by University of Massachusetts, Worcester. The registered enrollment target is 21,844 participants, above the 1,403-participant average among 58,714 other NA trials with a reported enrollment target (1457% higher). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT04981392, a NA study, has completed, sponsored by University of Massachusetts, Worcester.
- COMPLETED
- Registry status
- NA
- Development phase
- 21,844 participants
- Enrollment target
Study Summary
The study aims to assess the impact of a multicomponent intervention to support Primary Care Provider (PCP) outreach to promote COVID-19 vaccination among vulnerable patients in and near Worcester, MA via a pragmatic, cluster randomized trial.
Primary Outcome
The number of patients in the intervention and control arms who receive at least one dose of a COVID-19 vaccination within 3 months of the last text message being sent will be ascertained via the Electronic Health Record (EHR).
Interventions
- BEHAVIORAL Primary care text message outreach to unvaccinated patients and resources to support PCPs
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 21,844 participants |
| Start Date | 2022-06-02 |
| Est. Completion | 2023-10-25 |
| Phase | NA |
What the finished NCT04981392 record still lists
NCT04981392 is an interventional study that assigns participants to a tested intervention. Its 21,844 participants enrollment target places it among the larger protocols in the corpus, above the 1,403-participant average among 58,714 other NA trials with a reported enrollment target (1457% higher).
The record links to 0 conditions, and to 1 intervention - of which Primary care text message outreach to unvaccinated patients and resources to support PCPs is the first listed.
NCT04981392 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT04981392 about?
NCT04981392 is a clinical study titled "Trusted Messengers: Intervention to Promote COVID-19 Vaccination". The study aims to assess the impact of a multicomponent intervention to support Primary Care Provider (PCP) outreach to promote COVID-19 vaccination among vulnerable patients in and near Worcester, MA via a pragmatic, cluster randomized trial.
What is the current status of trial NCT04981392?
This trial is currently completed. It is a NA study. The enrollment target is 21,844 participants. The study started on 2022-06-02. Estimated completion is 2023-10-25.
What interventions are being tested in trial NCT04981392?
The interventions under investigation include: Primary care text message outreach to unvaccinated patients and resources to support PCPs (BEHAVIORAL).
Who is sponsoring clinical trial NCT04981392?
This trial is sponsored by University of Massachusetts, Worcester, which has 240 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT04981392's enrollment target sits among peer trials
21,844 10th of 2000 higher than 1,991 of 2,000 other NA trials
participants (enrollment target), bucketed by value
Each bar is a band; taller bars hold more other NA 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
- NCT05832307 · 22,000 participants · NA
The INFLUENTIAL Trial- Evaluation of National Inpatient Influenza Vaccination Program
- NCT05488080 · 22,032 participants · NA
PAINED: Project Addressing INequities in the Emergency Department
- NCT07413211 · 22,068 participants
Genetic Developmental and Epileptic Encephalopathy Natural History Study for Clinical Trial Readiness
- NCT06486688 · 22,320 participants · NA
Centralized Virtual SBIRT for Pediatric Primary Care
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