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Purpose

In this work, the investigators are partnering with Contra Costa Health Services (CCHS), the department of health in Contra Costa County, CA, to measure COVID-19 vaccinations and other COVID-19 related preventive health behaviors in the county's Medicaid managed care population. This work will test ways to increase COVID-19 vaccine uptake. The investigators hypothesize that small financial incentives and other low-cost behavioral nudges can be used to increase vaccine uptake and reduce disparities in uptake among diverse racial/ethnic minority populations.

Conditions

Eligibility

Eligible Ages
Over 18 Years
Eligible Sex
All
Accepts Healthy Volunteers
No

Inclusion Criteria

  • age 18 and over - member of Contra Costa Health Plan (CCHP)

Exclusion Criteria

  • contraindications to vaccination, as determined by county health plan or other medical staff.

Study Design

Phase
N/A
Study Type
Interventional
Allocation
Randomized
Intervention Model
Parallel Assignment
Primary Purpose
Health Services Research
Masking
None (Open Label)

Arm Groups

ArmDescriptionAssigned Intervention
Placebo Comparator
Control Arm 		No messaging about COVID-19 vaccination
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
Experimental
Emotional message 		Participants view an emotional video from the state of California about getting back to normal.
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
Experimental
Safety and effectiveness message 		Participants view a video with information about the safety and effectiveness of the COVID-19 vaccines
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
  • Behavioral: Race concordant
    Randomized to a messenger who is race concordant with the participant
  • Behavioral: Gender concordant
    Randomized to a messenger who is gender concordant with the participant
Experimental
Consequences message 		Participants view a video with information about the consequences of not getting vaccinated against COVID-19.
  • Behavioral: Financial incentives
    Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)
  • Behavioral: Convenient scheduling link
    In addition, study arms will be randomly assigned a convenient link to the county public vaccine appointment scheduling system highlighted for participants (N=5,000).
  • Behavioral: Race concordant
    Randomized to a messenger who is race concordant with the participant
  • Behavioral: Gender concordant
    Randomized to a messenger who is gender concordant with the participant

Recruiting Locations

More Details

NCT ID
NCT04867174
Status
Completed
Sponsor
National Bureau of Economic Research, Inc.

Notice

Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.