N/A
N=194,238
Patient Portal Flu Vaccine Reminders_RCT 5 (LADHS)
Influenza · Respiratory Tract Infections
Bottom Line
View on ClinicalTrials.gov: NCT05535777 ↗Enrolled (actual)
194,238
Serious AEs
—
Results posted
Apr 2025
Primary outcome: Primary: Receipt of the Annual Influenza Vaccine Among Adult and Pediatric Index Patients — 4641; 4629; 120137 Participants
Study Design & Population
- Study type
- Interventional
- Phase
- N/A
- Interventions
- Enhanced texts with Callback by a Person (Behavioral); Enhanced Bidirectional Texts (Behavioral)
- Age
- Pediatric, Adult, Older Adult · 0+ yrs
- Sex
- All
- Sponsor
- University of California, Los Angeles
- Primary completion
- Mar 2023
Outcome Measures
| Outcome | Result | p-value |
|---|---|---|
| PRIMARY Receipt of the Annual Influenza Vaccine Among Adult and Pediatric Index Patients |
4641; 4629; 120137 | — |
| SECONDARY Receipt of the Annual Influenza Vaccine Among Pediatric Index Patients |
— | — |
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).
Eligibility Criteria
Inclusion Criteria
- LADHS patients identified as primary care patients assigned as follows: (1) assigned through managed care plans, (2) self-pay but linked with a provider, or (3) uninsured but assigned.
Exclusion Criteria
- LADHS patient not identified as a primary care patient.
Data sourced from ClinicalTrials.gov (NCT05535777). Outcome figures and adverse-event rates are extracted automatically from the registry's posted results and are provided for clinician reference, not as a substitute for the primary publication.