COVID-19 Vaccination Take-Up

Study Overview
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Brief Summary
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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.

Official Title
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COVID-19 Vaccination Take-Up in a County-Run Medicaid Managed Care Population

Conditions
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Covid19, Vaccination

Intervention / Treatment
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* Behavioral: Financial incentives
* Behavioral: Convenient scheduling link
* Behavioral: Race concordant
* Behavioral: Gender concordant


Participation Criteria
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Eligibility Criteria
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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.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

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


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: Control Arm<br>No messaging about COVID-19 vaccination | Behavioral: Financial incentives<br>* Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)<br>Behavioral: Convenient scheduling link<br>* 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).<br>|
| Experimental: Emotional message<br>Participants view an emotional video from the state of California about getting back to normal. | Behavioral: Financial incentives<br>* Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)<br>Behavioral: Convenient scheduling link<br>* 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).<br>|
| Experimental: Safety and effectiveness message<br>Participants view a video with information about the safety and effectiveness of the COVID-19 vaccines | Behavioral: Financial incentives<br>* Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)<br>Behavioral: Convenient scheduling link<br>* 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).<br>Behavioral: Race concordant<br>* Randomized to a messenger who is race concordant with the participant<br>Behavioral: Gender concordant<br>* Randomized to a messenger who is gender concordant with the participant<br>|
| Experimental: Consequences message<br>Participants view a video with information about the consequences of not getting vaccinated against COVID-19. | Behavioral: Financial incentives<br>* Each of the study arms, including the no message/control arm, will be interacted with different financial incentives (N=5,000)<br>Behavioral: Convenient scheduling link<br>* 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).<br>Behavioral: Race concordant<br>* Randomized to a messenger who is race concordant with the participant<br>Behavioral: Gender concordant<br>* Randomized to a messenger who is gender concordant with the participant<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of COVID-19 vaccination at 1 month | Percent of the population with at least one COVID-19 vaccination | 1 month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of COVID-19 vaccination at 6 months | Percent of the population with at least one COVID-19 vaccination | 6 months | 
| COVID-19 vaccination | COVID-19 vaccination at 1-year | 1 year | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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COVID19, vaccination