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Member Research & Reports

Member Research & Reports

UNC Study: Vaccination Confidence Scale Identifies Parents at Risk for Refusing Adolescent Vaccines

A sizable minority of parents in the U.S. have concerns that lead them to refuse or delay certain vaccines for their children. The most common concerns include fearing long-term adverse effects, believing the vaccine is not needed and feeling uncertain about the vaccine’s effectiveness.

[Photo: A UNC study concludes that the Vaccination Confidence Scale shows promise as a tool for identifying parents at risk for refusing to vaccinate their adolescents. Photo by VCU Capital News Service.]

Assessing parents’ beliefs about vaccination is critical to surveillance and intervention efforts, but the field currently lacks a holistic measure to characterize vaccination beliefs regarding adolescents.

To develop such a tool, a team of researchers sought to validate the Vaccination Confidence Scale, an eight-item, three-factor measure of vaccination beliefs that prior research has shown to be highly reliable across diverse populations.

Dr. Noel T. Brewer, associate professor of health behavior at the UNC Chapel-Hill Gillings School of Global Public Health and member of the UNC Lineberger Comprehensive Cancer Center, is the study’s senior author. Lead author Dr. Melissa B. Gilkey, is a former postdoctoral research associate at UNC Lineberger, now assistant professor of population medicine at Harvard Medical School.

Using a nationally representative sample of parents of adolescents, the study analyzed associations between Vaccination Confidence Scale scores and vaccine refusal, vaccine delay, and vaccination status.

Using the full eight-item scale, vaccination confidence was negatively associated with measures of vaccine refusal and positively associated with measures of vaccination status. For example, refusal of any vaccine was more common among parents whose scale scores were medium or low versus high. A four-item, short form of the scale yielded similar results.

This study concludes that the Vaccination Confidence Scale shows promise as a tool for identifying parents at risk for refusing adolescent vaccines. By validating this brief measure of vaccination beliefs, the researchers aim to provide a practical tool for understanding and intervening on forgone vaccination among parents of adolescents.

The full article on these findings, titled “Validation of the Vaccination Confidence Scale: A Brief Measure to Identify Parents at Risk for Refusing Adolescent Vaccines,” was published online August 20 in Academic Pediatrics.

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