Development of a US trust measure to assess and monitor parental confidence in the vaccine system.

Vaccine 37(2): 325-332.

Abstract: To develop a Vaccine Confidence Index (VCI) that is capable of detecting variations in parental confidence towards childhood immunizations centered on trust and concern issues that impact vaccine confidence. Methods: We used a web-based national poll of 893 parents of children <7 years in 2016 to assess the measures created for the Emory VCI (EVCI). EVCI measures were developed using constructs related to vaccine confidence identified by the U.S. National Vaccine Advisory Committee (i.e., “Information Environment”, “Trust”, “Healthcare Provider”, “Attitudes and Beliefs”, and “Social Norms”). Reliability for EVCI was assessed using Cronbach’s alpha. Using the variables related to each of the constructs, we calculated an overall EVCI score that was then assessed against self-reported childhood vaccine receipt using chi-square and the Cochrane-Armitage trend tests. Results: Respondents’ EVCI scores could range from 0 to 24, and the full range of values was observed in this sample (Mean = 17.5 (SD 4.8)). EVCI scores were significantly different (p ≤ 0.006 for all comparisons) between parents who indicated their child(ren) received routinely recommended vaccines compared with parents who indicated they had delayed or declined recommended immunizations. There was also a significant, consistent association between higher EVCI scores and greater reported vaccine receipt. Conclusions: We developed EVCI to reliably measure parental vaccine confidence, with individuals’ scores linked to parental vaccine-related attitudes, intentions, and behaviors. As such, EVCI may be a useful tool for future monitoring of both population and individual confidence in childhood immunization.

Glen Nowak 

Related Research


Beyond Fear Appeals: The Role of Hope in Improving Effectiveness of Health Messages.” Paper accepted for poster by Communicating Science, Health, Environment, and Risk Division

Abstract: One of the understudied areas in health communication research is hope. This study examines the effect of efficacy-inducing information on hope and subsequent attitudinal health behaviors. A total of five hundred fifty-three adults in the United States read health promotion social media posts designed to induce perceived self-efficacy (vs. non-efficacy-inducing health information) in fear-appeal […]

Bartosz WojdynskiYoungji SeoJeongHyun (Janice) Lee
read more
Effective Health Risk Communications: Lessons Learned about COVID-19 Pandemic through the Lens of Practitioners

Abstract: The study utilizes semi-structured interviews of health risk communication practitioners in the backdrop of the COVID-19 pandemic. The contingency theory of strategic conflict management is the guide to understanding the challenges and nuances. Insights gained from interviewing practitioners (projected, n=40) from different sectors with diverse professional backgrounds will help advance the contingency theory’s application […]

Yan JinTaylor Voges
read more