Planning Message Recommending Same Time/Location as Last Vaccine

University of Pennsylvania

Status: Completed

Conditions: COVID-19

Treatments: Behavioral: COVID Booster text messages

Study type: Interventional

Funder types: Other

Identifiers

NCT05612386

851911-Trial E

Details and patient eligibility

About

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.

Enrollment: 520,000 patients

Sex: All

Ages: 18+ years old

Volunteers: Accepts Healthy Volunteers

Inclusion and exclusion criteria

Exclusion Criteria:

1. The patient unsubscribed from texts before the send date and time of the patient's SMS/MMS message
2. The patient received a bivalent COVID booster before the send date and time of the patient's SMS/MMS message.

Trial design

Primary purpose: Health Services Research

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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520,000 participants in 2 patient groups

Control condition with "waiting for you" message

Experimental group

Description:

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.

Treatment:

Behavioral: COVID Booster text messages

Planning message recommending same time/location as last vaccination

Experimental group

Description:

This condition will use a text message recommending the same time and location as the participant's last vaccination to get a COVID vaccination.

Treatment:

Behavioral: COVID Booster text messages