Lottery Incentive Nudges to Increase Influenza Vaccinations
NCT ID: NCT05012163
Last Updated: 2024-12-30
Study Results
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View full resultsBasic Information
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COMPLETED
NA
57581 participants
INTERVENTIONAL
2021-09-04
2022-12-31
Brief Summary
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Detailed Description
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Patients will be randomized into 4 to 9 study arms, depending on a sample size projection completed in August 2021. Arms will test the relative efficacy of a variety of small monetary incentives on flu shot uptake. Incentives may include (a) a $1 Pennsylvania scratch-off lottery ticket (with top prize of $5,000), (b) $1 in cash, (c) entry into a raffle for $5,000 absent upfront odds, (d) entry into a raffle for $5,000, with 1-in-5,000 odds of winning, (d) entry into a raffle for $50, with 1-in-50 odds of winning, and (e) entry into a raffle for $500, with 1-in-500 odds of winning. There will be one no-contact control arm and at least 1 reminder control arm (with additional control arms added given sufficient sample size and additional message versions to be tested).
Included in the study will be current Geisinger patients 18+ years of age with no contraindications for flu vaccine who have an appointment scheduled during the study period with a provider who can administer the vaccine. The primary study outcomes will be the rates of flu vaccination and flu diagnosis during the 2021-22 season by targeted patients.
Conditions
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Keywords
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Study Design
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RANDOMIZED
PARALLEL
* Pennsylvania Lottery Scratch-Off Financial Incentive
* Certain Cash Payout Financial Incentive
* Reminder / Active Control Arm (No Financial Incentive)
* No Treatment Control Arm
PREVENTION
SINGLE
Study Groups
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Pennsylvania (PA) Lottery Scratch-Off Financial Incentive
Participants in this arm will receive a message stating that they will receive a PA lottery $1 scratch-off ticket if they get a flu shot at an upcoming appointment. The message will mention that they could win $5,000 (the top prize for the scratch-off game).
Note: $1 scratch-off products vary over time; at study implementation, an active game with top prize of $5,000 (or the next-highest top prize) will be selected and will define the prize in the raffle absent upfront odds
Reminder
Letter, short message service (SMS) text, phone, and/or email
Financial incentive
Letter, SMS, phone, and/or email
Lottery
Letter, SMS, phone, and/or email
Certain Cash Payout Financial Incentive
Participants in this arm will receive a message stating that they will receive $1 in cash if they get a flu shot at an upcoming appointment.
Reminder
Letter, short message service (SMS) text, phone, and/or email
Financial incentive
Letter, SMS, phone, and/or email
Reminder / Active Control (No Financial Incentive)
Participants in this arm will receive a message stating that they can get a flu shot at an upcoming appointment. These participants will not be offered a financial incentive for getting a flu shot.
Reminder
Letter, short message service (SMS) text, phone, and/or email
No Treatment Control
No additional contact beyond standard Geisinger flu shot communications
No interventions assigned to this group
Interventions
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Reminder
Letter, short message service (SMS) text, phone, and/or email
Financial incentive
Letter, SMS, phone, and/or email
Lottery
Letter, SMS, phone, and/or email
Eligibility Criteria
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Inclusion Criteria
* Pennsylvania mailing address listed
* Geisinger primary care provider (PCP) assigned
* Upcoming appointment with PCP or select specialist who stocks and can administer the vaccine during the study period
Exclusion Criteria
18 Years
ALL
No
Sponsors
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Geisinger Clinic
OTHER
Massachusetts Institute of Technology
OTHER
National Institute on Aging (NIA)
NIH
National Bureau of Economic Research, Inc.
OTHER
Responsible Party
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Principal Investigators
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Michelle N Meyer, PhD JD
Role: PRINCIPAL_INVESTIGATOR
Geisinger Clinic
Christopher F Chabris, PhD
Role: PRINCIPAL_INVESTIGATOR
Geisinger Clinic
Locations
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Geisinger Clinic
Danville, Pennsylvania, United States
Countries
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Provided Documents
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Document Type: Study Protocol
Document Type: Statistical Analysis Plan
Other Identifiers
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2021-0484
Identifier Type: -
Identifier Source: org_study_id