COVID-19 Vaccine Text Outreach
Public ClinicalTrials.gov record NCT04834726. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Official title
Pragmatic Trial of COVID Vaccine Text Outreach Interventions
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This project aims to evaluate different approaches to increase COVID-19 vaccine uptake among at-risk patients at Penn Medicine in an equitable and systematic manner through a centralized outreach program. The investigators will evaluate different text-based scheduling and messaging approaches informed by behavioral science to increase uptake among eligible patients, including the use of clinician endorsement, opt-out framing, and scarcity.
Study identification
- NCT ID
- NCT04834726
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 19,554 participants
Conditions and interventions
Conditions
Interventions
- Opt-In (Call-Back) Behavioral
- Opt-in (In-Bound) Behavioral
- Standard Message Behavioral
- Clinician Endorsement Behavioral
- Scarcity Behavioral
- Opt-Out Framing Behavioral
- Phone Call Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 16 Years and older
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Apr 28, 2021
- Primary completion
- Jun 3, 2021
- Completion
- Jul 5, 2021
- Last update posted
- Mar 26, 2023
2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Hospital of the University of Pennsylvania | Philadelphia | Pennsylvania | 19104 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04834726, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 26, 2023 · Synced Sep 8, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04834726 live on ClinicalTrials.gov.