Planning Message Recommending Same Time/Location as Last Vaccine

Study Overview
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Brief Summary
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This experiment is part of a megastudy with a total of ten experimental conditions and a holdout control condition to which patients will be randomly assigned. The focal comparison in this experiment is between a message suggesting the same day of the week, at the same time of day, and at the same pharmacy location as their last vaccination and a control message telling patients that an updated COVID booster vaccine is waiting for them. The intervention testing if text messages encouraging vaccination by suggesting patients receive a shot on the same day of the week, at the same time of day, and at the same pharmacy location as their last vaccination will produce more vaccinations than otherwise identical messages.

Official Title
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Planning Message Recommending Same Time/Location as Last Vaccine

Conditions
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COVID-19

Intervention / Treatment
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* Behavioral: COVID Booster text messages


Participation Criteria
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Eligibility Criteria
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Exclusion Criteria: The patient unsubscribed from texts before the send date and time of the patient's SMS/MMS message The patient received a bivalent COVID booster before the send date and time of the patient's SMS/MMS message.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Health Services Research
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: Participants will be randomly assigned to the different arms.
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Control condition with waiting for you message<br>This control condition will use the text message that the investigators found to be the best performing in their last mega-study of vaccine text messages to recommend a COVID vaccination. | Behavioral: COVID Booster text messages<br>* Participants will receive text messages per descriptions listed in the arms.<br>|
| Experimental: Planning message recommending same time/location as last vaccination<br>This condition will use a text message recommending the same time and location as the participant's last vaccination to get a COVID vaccination. | Behavioral: COVID Booster text messages<br>* Participants will receive text messages per descriptions listed in the arms.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| COVID bivalent booster receipt | Whether patients receive a bivalent COVID booster at the pharmacy in question | During the 30 days after receiving the SMS/MMS intervention | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| COVID bivalent booster receipt | Whether patients receive a bivalent COVID booster at the pharmacy in question | 60 days after receiving the SMS/MMS intervention | 
| COVID bivalent booster receipt | Whether patients receive a bivalent COVID booster at the pharmacy in question | 90 days after receiving the SMS/MMS intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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COVID-19, behavioral science interventions, vaccination promotion