6 Months and older, any sex, with Influenza or Respiratory Tract Infections. Patients with the condition only — healthy volunteers not accepted.
Results — posted to ClinicalTrials.gov
Per-arm endpoint measurements with 95% confidence intervals where reported. Source: trial results section.
Receipt of the Annual Influenza Vaccine Among Adult and Pediatric Index PatientsPrimary· 6 months
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 assigned). Individuals not affiliated with any primary care practice will be excluded from the prima
Group
Value
95% CI
Enhanced Text Reminders With Callback by Person
4641
Enhanced Bidirectional Text Reminders
4629
Standard Text Reminders
120137
Sponsor's own description
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).
Publications & conference data
No peer-reviewed publications indexed yet for this trial. Completed trials usually publish results within 12-18 months.
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Sponsor: as reported to ClinicalTrials.gov by University of California, Los Angeles
Last refreshed: 11 April 2025
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