Patient Portal Reminder/Recall for Influenza Vaccination in a Health System- UCLA Portal R/R Influenza RCT 3
Public ClinicalTrials.gov record NCT04533685. 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
Patient Portal Reminder/Recall for Influenza Vaccination in a Health System- RCT 3
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This trial is taking place in Los Angeles, CA among patients from primary care practices within the UCLA Health System. The study design is a 2x2x2 factorial design, nested in a parallel 2-arm trial. The parallel arms are control v. reminder letter (reminder messages sent via the patient portal, reminding participants of an overdue influenza vaccine) Nested within the reminder letter arm, we will have 3 additional components: * A direct scheduling link within the reminder letter enabling the patient to schedule an influenza vaccine only visit (direct scheduling link vs. no direct scheduling link). * A pre-commitment prompt (pre-commitment prompt vs. no prompt) asking about a patient's intention to get the influenza vaccination * A pre-appointment reminder, encouraging patients to ask for their influenza vaccine at their upcoming appointment (pre-appointment reminder encouraging influenza vaccination vs. standard pre-appointment reminder not mentioning influenza vaccination)
Study identification
- NCT ID
- NCT04533685
- Recruitment status
- Completed
- Study type
- Interventional
- Phase
- Not applicable
- Enrollment
- 213,773 participants
Conditions and interventions
Conditions
Interventions
- Portal Reminders for Influenza Vaccination: Direct scheduling link Behavioral
- Portal Reminders for Influenza Vaccination: No direct scheduling link Behavioral
- Pre-Commitment Prompt Behavioral
- Pre-Appointment flu vaccine reminders Behavioral
Behavioral
Eligibility (public fields only)
- Age range
- 4 Months 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
- Aug 31, 2020
- Primary completion
- Mar 31, 2021
- Completion
- Mar 31, 2021
- Last update posted
- Oct 24, 2022
2020 – 2021
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of California LA | Los Angeles | California | 99095 | — |
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 NCT04533685, 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 Oct 24, 2022 · Synced Sep 5, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04533685 live on ClinicalTrials.gov.