COVID-19 Booster Incentives

NCT ID: NCT05648773

Last Updated: 2023-08-14

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

57893 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-12-08

Study Completion Date

2022-12-23

Brief Summary

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The goal of this work is to understand whether small financial incentives and messaging can increase the take-up of COVID-19 boosters among patients empaneled at a county public health system. The motivation for this work is the relatively low take-up of COVID-19 boosters. In California, where our experiment is based, only 59% of the population has been boosted, with only 13% receiving the recommended bivalent booster (State of California, 2022).

Detailed Description

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Conditions

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Booster Message Booster Message + Financial Incentive

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

HEALTH_SERVICES_RESEARCH

Blinding Strategy

SINGLE

Participants

Study Groups

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Message Only

Email or SMS Booster Vaccination Reminder

Group Type EXPERIMENTAL

Messaging

Intervention Type BEHAVIORAL

Booster reminder message

Message + Financial Incentive

Email or SMS Booster Vaccination Reminder + Offer of a financial incentive for getting boosted in the next 2 weeks.

Group Type EXPERIMENTAL

Messaging

Intervention Type BEHAVIORAL

Booster reminder message

Financial Incentive

Intervention Type BEHAVIORAL

Financial Incentive for getting boosted within 2-weeks of the message

Control

No message or financial incentive

Group Type PLACEBO_COMPARATOR

Placebo

Intervention Type OTHER

Treatment as usual; no additional message and no incentive.

Interventions

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Messaging

Booster reminder message

Intervention Type BEHAVIORAL

Financial Incentive

Financial Incentive for getting boosted within 2-weeks of the message

Intervention Type BEHAVIORAL

Placebo

Treatment as usual; no additional message and no incentive.

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

1. Age: 18 and above
2. At least one COVID-19 vaccination (primary series or monovalent booster) but no vaccination dose within the past 2-months.
3. Active phone number or email

Exclusion Criteria

1\. Opt-out of health system messaging
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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J-PAL North America

UNKNOWN

Sponsor Role collaborator

University of Southern California

OTHER

Sponsor Role lead

Responsible Party

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Mireille Jacobson

Associate Professor

Responsibility Role PRINCIPAL_INVESTIGATOR

Locations

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Contra Costa Health Plan

Martinez, California, United States

Site Status

Countries

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United States

Other Identifiers

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UP-21-01097

Identifier Type: -

Identifier Source: org_study_id

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