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NCT05535777 · ClinicalTrials.gov registry record · NA
Patient Portal Flu Vaccine Reminders_RCT 5 (LADHS)
A NA study, sponsored by University of California, Los Angeles.
- Completed
- Registry status
- NA
- Development phase
- 246,295
- Enrollment target
NCT05535777: Completed NA study, sponsored by University of California, Los Angeles.
NCT05535777 is a NA study that has completed, run by University of California, Los Angeles. The registered enrollment target is 246,295 participants, above the 1,399-participant average among 58,714 other NA trials with a reported enrollment target (17505% higher). According to ClinicalTrials.gov, the official US trial registry.
The verdict
NCT05535777, a NA study, has completed, sponsored by University of California, Los Angeles.
- COMPLETED
- Registry status
- NA
- Development phase
- 246,295 participants
- Enrollment target
Study Summary
This trial is taking place in Los Angeles, CA at clinics within the Los Angeles Department of Health clinics. The study design is a comparative effectiveness trial design. Patients will be randomized into 1) receiving enhanced texting with a callback by a trained call-center staff member to schedule a vaccine visit if the patient presses "1" in response to the text, 2) receiving enhanced bidirectional texting with a texting response from a trained call-center staff member who will help the patient schedule a vaccine visit through a series of back-and-forth texts, or 3) standard text reminders (control group). Patients in all arms will receive reminders if they are due for influenza vaccine. Despite the Advisory Committee on Immunization Practices (ACIP) recommendation in 2010 that all people above 6 months of age should receive an annual flu vaccine, vaccination rates remain low: at 6m-4.9 yrs. (70%), 5-17.9 yrs. (56%), 18-64.9 yrs. (38%), and \>65 yrs. (63%). The investigators will assess the effectiveness of enhanced text R/R messages as compared to the standard of care control (standard text reminders).
Primary Outcome
Percent of patients with annual influenza vaccination (between 9/1/22 - 4/1/23) among adult and pediatric index patients. Outcomes will be assessed via vaccine data extraction from the electronic health record and external claims and pharmacy data. The index patients must be an LADHS patient. Primary care patients who are empaneled to a primary care provider within DHS are assigned as follows: (1) assigned through managed care plans, (2) self-pay but linked with a provider or (3) uninsured but
Interventions
- BEHAVIORAL Enhanced texts with Callback by a Person
- BEHAVIORAL Enhanced Bidirectional Texts
Trial Details
| Field | Value |
|---|---|
| Enrollment Target | 246,295 participants |
| Start Date | 2022-09-13 |
| Est. Completion | 2023-03-31 |
| Phase | NA |
What the finished NCT05535777 record still lists
NCT05535777 is an interventional study that assigns participants to a tested intervention. Its 246,295 participants enrollment target places it among the larger protocols in the corpus, above the 1,399-participant average among 58,714 other NA trials with a reported enrollment target (17505% higher).
The record links to 0 conditions, and to 2 interventions - of which Enhanced texts with Callback by a Person is the first listed.
NCT05535777 does not publish any study locations in the registry export this page uses.
Frequently Asked Questions
What is clinical trial NCT05535777 about?
NCT05535777 is a clinical study titled "Patient Portal Flu Vaccine Reminders_RCT 5 (LADHS)". This trial is taking place in Los Angeles, CA at clinics within the Los Angeles Department of Health clinics. The study design is a comparative effectiveness trial design. Patients will be randomized into 1) receiving enhanced texting with a callback by a trained call-center staff member to schedul...
What is the current status of trial NCT05535777?
This trial is currently completed. It is a NA study. The enrollment target is 246,295 participants. The study started on 2022-09-13. Estimated completion is 2023-03-31.
What interventions are being tested in trial NCT05535777?
The interventions under investigation include: Enhanced texts with Callback by a Person (BEHAVIORAL), Enhanced Bidirectional Texts (BEHAVIORAL).
Who is sponsoring clinical trial NCT05535777?
This trial is sponsored by University of California, Los Angeles, which has 897 total clinical trials registered on ClinicalTrials.gov.
Learn More About Clinical Trials
How this trial's enrollment target compares
Where NCT05535777's enrollment target sits among peer trials
246,295 1st of 2000 higher than 2,000 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
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