Incentives for Influenza Vaccination

May 9, 2024 updated by: Mireille Jacobson, University of Southern California

Financial Incentives for Influenza Vaccination

In this work, we are assessing the impact of messaging with or without a $50 financial incentive on influenza vaccination rates in a county health system. Our main hypothesis is that a message with a $50 financial incentive will increase vaccination rates relative to a control/"treatment as usual" group. We further hypothesize that the financial incentive will increase vaccination rates relative to the message only arm.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

69972

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • California
      • Martinez, California, United States, 94553
        • Contra Costa Health Services

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Description

Inclusion Criteria:

  • Ages 18 and over
  • Empaneled patients or non-empaneled patients with a primary care visit in past 18 months with valid insurance
  • Due for an annual flu shot according to the electronic medical record
  • Active phone number or email
  • Do not have "Do not contact" flag

Exclusion Criteria:

  • Under age 18
  • Received an annual flu shot based on medical record

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Health Services Research
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Message Only
Patients sent an email or SMS reminding them to get vaccinated against the flu.
Behavioral: Reminders
Reminders
Experimental: Message + Financial Incentive
Patients sent an email or SMS reminding them to get vaccinated against the flu and offering them a $50 financial incentive if they are vaccinated within 1-week.
Behavioral: Reminders
Reminders
Behavioral: Financial Incentive
$50 financial incentive for getting vaccinated within 1-week
Active Comparator: Active Control
Patients not sent any reminder message.
Other: Placebo
No special messages or incentives

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Vaccination status at 1 week
Time Frame: 1 week
influenza vaccination status as documented in the EMR and from the California Immunization Registry (CAIRS)
1 week

Secondary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Vaccination status at 2 weeks
Time Frame: 2 weeks
Influenza vaccination status as documented in the EMR and from the California Immunization Registry (CAIRS)
2 weeks
Vaccination status at 1 month
Time Frame: 1 month
Influenza vaccination status as documented in the EMR and from the California Immunization Registry (CAIRS)
1 month

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

University of Southern California

Collaborators

J-PAL North America

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 17, 2024

Primary Completion (Actual)

January 24, 2024

Study Completion (Actual)

February 29, 2024

Study Registration Dates

First Submitted

February 28, 2024

First Submitted That Met QC Criteria

March 5, 2024

First Posted (Actual)

March 8, 2024

Study Record Updates

Last Update Posted (Actual)

May 13, 2024

Last Update Submitted That Met QC Criteria

May 9, 2024

Last Verified

May 1, 2024

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

  • UP-23-00859

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Will be shared with qualified researchers upon request.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ANALYTIC_CODE

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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