Non-integrated Costs Increase Effectiveness of Incentives

Not Applicable

Completed

• Conditions: Indirect Incentive; Control - No Incentive for Flu Vaccine; Direct Incentive
• Interventions: Behavioral: Email Message; Behavioral: Incentive for Vaccination; Behavioral: Incentive for completing a short survey

• Registration Number: NCT03507231
• Lead Sponsor: Carnegie Mellon University

Brief Summary

The investigators will test the hypothesis that the control (no incentive) condition will have the lowest vaccination rate, the main task condition will have a significantly higher vaccination rate while the indirect condition will have the highest vaccination rate.

Participants will be randomly assigned to one of the three message conditions and their vaccination records obtained from the university Occupational Health Department.

Detailed Description

The investigators will send e-mails to a complete mailing list of faculty and staff at a university. Each recipient will be randomly assigned to one of three conditions: control, main task incentive or indirect incentive. Our main dependent variable will be whether or not participants decide to get vaccinated. The investigators will obtain their actual vaccination records from the university Occupational Health Department.

Within the e-mail message, participants will indicate whether or not they intend to get vaccinated. Intention serves as an indirect dependent outcome. Upon clicking to indicate their intention, participants are redirected to a page which gives further instructions on how to proceed.

Participants who vaccinate will be asked to complete a brief follow-up questionnaire to evaluate their experience with vaccination and (for those offered and incentive) to provide contact information to receive their payment.

Study Timeline

• Study Start: 2017-09-20
• Primary Completion: 2018-01-20
• Study Completion: 2018-01-20
• Study First Submitted: 2018-01-24
• Status Verified: 2018-04
• Study First Submitted QC: 2018-04-23
• Last Update Submitted: 2018-04-23
• Study First Posted: 2018-04-25
• Last Update Posted: 2018-04-25

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 12531

Inclusion Criteria

• Must be faculty or staff at Rutgers University.

Exclusion Criteria

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Direct Incentive	Incentive for Vaccination	Participants will receive an E-mail Message encouraging them to get vaccinated, and asking them to indicate if they intend to do so and to complete a brief questionnaire after vaccination. They are offered an Incentive for Vaccination ($5 Amazon Gift Card).
Indirect Incentive	Incentive for completing a short survey	Participants will receive an E-mail Message encouraging them to get vaccinated, and asking them to indicate if they intend to do so and to complete a brief questionnaire after vaccination. They are offered an Incentive for completing a short survey ($5 Amazon Gift Card).
Indirect Incentive	Email Message	Participants will receive an E-mail Message encouraging them to get vaccinated, and asking them to indicate if they intend to do so and to complete a brief questionnaire after vaccination. They are offered an Incentive for completing a short survey ($5 Amazon Gift Card).
Direct Incentive	Email Message	Participants will receive an E-mail Message encouraging them to get vaccinated, and asking them to indicate if they intend to do so and to complete a brief questionnaire after vaccination. They are offered an Incentive for Vaccination ($5 Amazon Gift Card).
Control	Email Message	Participants will receive an E-mail Message encouraging them to get vaccinated, and asking them to indicate if they intend to do so and to complete a brief questionnaire after vaccination.

Primary Outcome Measures

Name	Time	Method
Number of people vaccinated	Up to 5 months	Measure the number of people who got vaccinated in the Fall 2017 semester at a large state university. We will collect vaccination records from the university Occupational Health Department

Secondary Outcome Measures

Name	Time	Method
Intention to get vaccinated	Up to 5 months	Participants will receive an e-mail with our main treatment manipulations. In each e-mail they will be able to indicate whether or not they want to get vaccinated. We will use this measure as a second dependent variable.

Trial Locations

Locations (1)

Rutgers University; 🇺🇸 New Brunswick, New Jersey, United States