NCT07172074

Comparing Relative Strengths of Statistical Associations Between Psychological Traits and Vaccination-Related Outcomes I

Improving Vaccine Outcomes in Older Adults-Quantitative

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 1,786 (actual)
• Sponsor: University of Iowa · Academic / Other
• Sex: All
• Age: 18 Years
• Healthy volunteers: Accepted

Summary

The goal of this study was to identify psychological motives that had the strongest statistical associations with vaccine outcomes in order to identify novel intervention targets to be used in vaccine promotion efforts. A national sample of US adults completed an online survey containing a variety of vaccine-related measures and psychological trait measures.

Detailed description

A national sample of US adults were recruited through Dynata, an online survey panel company, to complete an online survey. Participants completed a variety of vaccine-related survey items and an unprecedented number (\>20) of psychological trait measures. This was possible by using a Planned Missingness Design, where respondents only answer a predetermined subset of survey questions, which allows us to include more measures without significantly increasing the burden for participants. Participants were randomized to one of the three question blocks, where each block had a predetermined set of items that were roughly 1/3 of the items from each psychological trait measure. They were also randomized to complete questions that were about the psychological traits in general or about vaccines specifically.

Conditions

• Vaccination
• Vaccination Hesitancy
• Vaccination Promotion
• Psychological Aspects

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	General Psych Trait Measure	Respondents were randomized to answer whether psychological trait questions were general or about vaccines
OTHER	Vaccine-Specific Psych Trait Measures	Respondents were randomized to answer whether psychological trait questions were general or about vaccines

Timeline

• Start date: 2022-12-30
• Primary completion: 2025-02-27
• Completion: 2025-02-27
• First posted: 2025-09-15
• Last updated: 2025-09-16

Locations

1 site across 1 country: United States