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| ID | Type | Description | Link |
|---|---|---|---|
| R01AI135029-04 | U.S. NIH Grant/Contract | View source |
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IT error which contaminated study arms
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| Name | Class |
|---|---|
| National Institute of Allergy and Infectious Diseases (NIAID) | NIH |
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This trial is taking place in Los Angeles, CA at clinics within the UCLA Health System.
The study design is a 2x2 nested factorial design. Patients will be randomized into 1) receiving text based reminder messages, 2) portal-based reminder messages or 3) the control group. Patients randomized to the intervention arms will receive reminders if they are due for influenza vaccine.
Nested within the reminder arms (text or portal), we will have 2 additional components for which patients will be randomized separately:
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 MyChart R/R messages and text R/R messages as compared to the standard of care control (no messages).
Sub-optimal vaccination rates are a significant problem in the U.S., despite their effectiveness in preventing morbidity and mortality from vaccine-preventable illness. For influenza specifically, annual epidemics of influenza cause substantial morbidity in the U.S. with up to 40,00-80,000 deaths/year and many hospitalizations, emergency and outpatient visits, and significant costs.
Reminder/recall (R/R), sent by phone, mail or other modality, can improve child and adult influenza vaccination rates. However, the majority of pediatric or adult primary care practices do not conduct R/R. Barriers are lack of finances, personnel, and algorithms to identify eligible patients.
A technological breakthrough that might overcome these barriers involves patient portals-- secure, web-based communication systems, embedded within electronic health records (EHRs), for patients and providers to communicate with each other via email and the internet. Portals are used by about half of Americans and half of UCLA patients. Another is text messaging at the health system level.
This randomized controlled trial will assess the effectiveness of reminders messages sent to portal users, encouraging influenza vaccination, on increasing influenza vaccination rates within a health system. Patients will be randomized into three groups: 1) one-third of patients will receive reminder letters via the portal, 2) one-third will receive reminders via text messages sent by the health system and 3) one-third will not receive reminders.
Patients in the reminder arms will be further randomized (separately) for two additional components: 1) direct appointment scheduling and 2) pre-appointment reminders.
Direct scheduling: The convenience of scheduling an appointment for influenza vaccination may increase the likelihood that patients receive an influenza vaccination. Patients receiving reminders will be randomized to receive one of two types of reminder letters: 1) one half will receive flu vaccine reminder letters with a link to the MyChart direct appointment scheduling page and 2) one half will receive flu vaccine reminder message without the direct appointment scheduling link.
Pre-appointment flu reminders: Finally, a missed opportunities for vaccination occurs when patients are eligible for vaccination but are not offered a vaccine at their medical appointment. Pre-appointment reminders, sent in advance of an upcoming appointment, encouraging the patient talk to their doctor about influenza vaccination, may increase the likelihood of that patient receiving a vaccine. Patients will be randomized to one of two groups: 1) one half will receive modified pre-appointment reminders that mention influenza vaccination and 2) one half will receive the standard pre-appointment reminders for an upcoming appointment (no mention of influenza vaccination).
Interventions that apply Behavioral Economics principles in vaccine promotion messaging can increase vaccine receipt. We will include ownership language in the pre-appointment messages. Additionally, the convenience of reminders sent via text and with a Direct Appointment Schedule link included enables patients to self-schedule a flu vaccine only visit, reducing friction for vaccine receipt.
For the primary analysis, the primary outcome will be the patient's end of flu season vaccination status. Intervention effects will be assessed using mixed effects log-binomial models. Models will contain terms for messaging modality (text v. portal v. none), pre-appointment reminders (sent v. not sent), and direct scheduling link (included v. not included).
The R/R text and portal messages (with and without direct scheduling links) and pre-appointment reminders and will all begin in October of 2021.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Text Message R/R with Direct Appointment Schedule Link | Active Comparator | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
|
| Text Message R/R without Direct Appointment Schedule Link | Active Comparator | Participants in this arm will receive up to 3 R/R messages by text with no link to schedule an appointment. |
|
| Text Message R/R with Direct Appointment Schedule Link + text Pre-Appointment Reminder | Active Comparator | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. |
|
| Text Message R/R without Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Active Comparator | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. |
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Text Message R/R with Direct Appointment Schedule Link | Behavioral | Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| Measure | Description | Time Frame |
|---|---|---|
| Receipt of the Annual Influenza Vaccine Among Adult and Pediatric Index Patients | Percent of patients with annual influenza vaccination (between 10/1/21 - 4/1/22) 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 also be an active UCLA Health MyChart user (>= 1 login over the last 12 months from 8/1/21, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis. | 6 months |
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| Measure | Description | Time Frame |
|---|---|---|
| Receipt of the Annual Influenza Vaccine Among Pediatric Index Patients | Percent of patients with annual influenza vaccination (between 10/1/21 - 4/1/22) among 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 also be an active UCLA Health MyChart user (>= 1 login over the last 12 months from 8/1/21, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis. |
Inclusion Criteria:
Exclusion Criteria:
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| Name | Affiliation | Role |
|---|---|---|
| Peter Szilagyi, MPH, MD | University of California, Los Angeles | Principal Investigator |
| Facility | Status | City | State | ZIP | Country | Contacts |
|---|---|---|---|---|---|---|
| University of California LA | Los Angeles | California | 99095 | United States |
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| ID | Title | Description |
|---|---|---|
| FG000 | Text Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| Title | Milestones | Reasons Not Completed | |||||
|---|---|---|---|---|---|---|---|
| Overall Study |
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| Type | Includes Protocol | Includes SAP | Includes ICF | Document Label | Document Date | Document Uploaded Date | Document File Name |
|---|---|---|---|---|---|---|---|
| Prot | Yes | No | No | Study Protocol | Oct 18, 2021 | Dec 12, 2024 |
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Pragmatic comparative effectiveness trial with a standard-of-care control group
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| Portal Message R/R with Direct Appointment Schedule Link | Active Comparator | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
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| Portal Message R/R without Direct Appointment Schedule Link | Active Comparator | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
|
| Portal Message R/R with Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Active Comparator | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. |
|
| Portal Message R/R without Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Active Comparator | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. |
|
| No R/R Message or Pre-Appointment Reminder | No Intervention | Participants do not receive any flu vaccine R/R message or Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment during the specified flu season. |
| Text Message R/R without Direct Appointment Schedule Link | Behavioral | Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
|
| Text Pre-Appointment Reminder | Behavioral | Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. |
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| Portal Message R/R with Direct Appointment Schedule Link | Behavioral | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
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| Portal Message R/R without Direct Appointment Schedule Link | Behavioral | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
|
| Portal Pre-Appointment Reminder | Behavioral | Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. |
|
| 6 months - Unable to analyze data due to contaminated study arms |
| FG001 | Text Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text with no link to schedule an appointment. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| FG002 | Text Message R/R With Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. |
| FG003 | Text Message R/R Without Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. |
| FG004 | Portal Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| FG005 | Portal Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| FG006 | Portal Message R/R With Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. |
| FG007 | Portal Message R/R Without Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. |
| FG008 | No R/R Message or Pre-Appointment Reminder | Participants do not receive any flu vaccine R/R message or Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment during the specified flu season. |
| COMPLETED |
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| NOT COMPLETED |
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| ID | Title | Description |
|---|---|---|
| BG000 | Text Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| BG001 | Text Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text with no link to schedule an appointment. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| BG002 | Text Message R/R With Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. |
| BG003 | Text Message R/R Without Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. |
| BG004 | Portal Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| BG005 | Portal Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. |
| BG006 | Portal Message R/R With Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. |
| BG007 | Portal Message R/R Without Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. |
| BG008 | No R/R Message or Pre-Appointment Reminder | Participants do not receive any flu vaccine R/R message or Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment during the specified flu season. |
| BG009 | Total | Total of all reporting groups |
| Units | Counts |
|---|---|
| Participants |
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| Title | Description | Population Description | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Denominator Units Selected | Denominators | Classes | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age, Categorical | Count of Participants | Participants |
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| Sex/Gender, Customized | Count of Participants | Participants |
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| Race/Ethnicity, Customized | Count of Participants | Participants |
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| Race/Ethnicity, Customized | Count of Participants | Participants |
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| Type | Title | Description | Population Description | Reporting Status | Anticipated Posting Date | Parameter Type | Dispersion Type | Unit of Measure | Calculate Percentage | Time Frame | Units Analyzed | Denominator Units Selected | Arm/Group Information | Denominators | Classes | Analyses | ||||||||||||||||||||||||||||||||||||||||||||
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| Primary | Receipt of the Annual Influenza Vaccine Among Adult and Pediatric Index Patients | Percent of patients with annual influenza vaccination (between 10/1/21 - 4/1/22) 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 also be an active UCLA Health MyChart user (>= 1 login over the last 12 months from 8/1/21, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis. | Posted | Count of Participants | Participants | 6 months |
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| Other Pre-specified | Receipt of the Annual Influenza Vaccine Among Pediatric Index Patients | Percent of patients with annual influenza vaccination (between 10/1/21 - 4/1/22) among 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 also be an active UCLA Health MyChart user (>= 1 login over the last 12 months from 8/1/21, excluding activity on the user's initial profile activation date). Individuals not affiliated with any primary care practice will be excluded from the primary analysis. | Not Posted | 6 months - Unable to analyze data due to contaminated study arms | Participants |
We did not collect information regarding adverse events.
We did not collect adverse event information. We monitored whether reminder recall through the portal and text was effective at increased influenza vaccination rates. Because influenza vaccination is recommended by the Advisory Committee on Immunization Practices and is part of the U.S. recommended vaccine schedule, we did not collect adverse event data.
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| ID | Title | Description | Deaths (Affected) | Deaths (At Risk) | Serious Events (Affected) | Serious Events (At Risk) | Other Events (Affected) | Other Events (At Risk) |
|---|---|---|---|---|---|---|---|---|
| EG000 | Text Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG001 | Text Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by text with no link to schedule an appointment. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG002 | Text Message R/R With Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG003 | Text Message R/R Without Direct Appointment Schedule Link + Text Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by text. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period. Text Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by text reminding them to get a flu vaccine without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Text Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via text when they schedule a visit during the study period advising them to get the flu vaccine at their upcoming appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG004 | Portal Message R/R With Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG005 | Portal Message R/R Without Direct Appointment Schedule Link | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG006 | Portal Message R/R With Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R with Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent with a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG007 | Portal Message R/R Without Direct Appointment Schedule Link + Portal Pre-Appointment Reminder | Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Participants will receive a Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment via portal when they schedule a visit during the study period. Portal Message R/R without Direct Appointment Schedule Link: Participants in this arm will receive up to 3 R/R messages by portal. R/R message will be sent without a Direct Appointment Scheduling link and instructions to make a flu vaccine appointment. Portal Pre-Appointment Reminder: Participants will receive a Pre-Appointment Reminder via the portal advising them to ask their doctor for the flu vaccine at their upcoming appointment via text when they schedule a visit during the study period. | 0 | 0 | 0 | 0 | 0 | 0 |
| EG008 | No R/R Message or Pre-Appointment Reminder | Participants do not receive any flu vaccine R/R message or Pre-Appointment Reminder advising them to ask their doctor for the flu vaccine at their upcoming appointment during the specified flu season. | 0 | 0 | 0 | 0 | 0 | 0 |
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Errors occurred with the text messaging component of our studying meaning that over half of the cohort that was randomized to receive the intervention did not receive the allocated messages. For this reason, our study team terminated the study early and had no intention of ever publishing these results but instead planned to repeat the trial correctly. Outcome results reported are not valid and have not been published
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| Title | Organization | Phone | Extension | |
|---|---|---|---|---|
| Principal Investigator | UCLA | 310-206-6328 | pszilagyi@mednet.ucla.edu |
| Prot_000.pdf |
| SAP | No | Yes | No | Statistical Analysis Plan | Oct 18, 2021 | Dec 12, 2024 | SAP_001.pdf |
| ID | Term |
|---|---|
| D007251 | Influenza, Human |
| D012141 | Respiratory Tract Infections |
| ID | Term |
|---|---|
| D007239 | Infections |
| D009976 | Orthomyxoviridae Infections |
| D012327 | RNA Virus Infections |
| D014777 | Virus Diseases |
| D012140 | Respiratory Tract Diseases |
Not provided
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| Between 18 and 65 years |
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| >=65 years |
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| Male |
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| Other |
|
| Unknown |
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| Missing |
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| Not Hispanic or Latino |
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| Unknown |
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| Asian |
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| Black |
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| Native Hawaiian or Other Pacific Islander |
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| White or Caucasian |
|
| Other |
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| Multiracial |
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| Unknown |
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| Missing |
|