COVID-19 Booster Incentives

Not Applicable

Completed

• Conditions: Booster Message; Booster Message + Financial Incentive
• Interventions: Behavioral: Messaging; Other: Placebo; Behavioral: Financial Incentive

• Registration Number: NCT05648773
• Lead Sponsor: University of Southern California

Brief Summary

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

Not available

Study Timeline

• Study Start: 2022-12-08
• Study First Submitted: 2022-12-08
• Study First Submitted QC: 2022-12-08
• Study First Posted: 2022-12-13
• Primary Completion: 2022-12-23
• Study Completion: 2022-12-23
• Status Verified: 2023-08
• Last Update Submitted: 2023-08-09
• Last Update Posted: 2023-08-14

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 57893

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

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Message Only	Messaging	Email or SMS Booster Vaccination Reminder
Message + Financial Incentive	Financial Incentive	Email or SMS Booster Vaccination Reminder + Offer of a financial incentive for getting boosted in the next 2 weeks.
Message + Financial Incentive	Messaging	Email or SMS Booster Vaccination Reminder + Offer of a financial incentive for getting boosted in the next 2 weeks.
Control	Placebo	No message or financial incentive

Primary Outcome Measures

Name	Time	Method
Vaccine booster	2 weeks	Received a booster vaccination within 2-weeks of message.

Trial Locations

Locations (1)

Contra Costa Health Plan; 🇺🇸 Martinez, California, United States