Figure 1.

Percentage of 19- to 35-month-old children unvaccinated against measles, by vaccine-related parental beliefs found to be the independent factors associated with being unvaccinated, 2011 National Immunization Survey

^an = unweighted sample size associated with the listed percentage. Sample sizes at daughter nodes may not add to the sample size at the parent node because of missing values in the variable defining splits at the daughter node.

^bGroup 1 consists of children whose parents believed that vaccines are necessary to protect the health of children and did not report refusing the administration of any vaccines.

^cGroup 2 consists of children whose parents believed that vaccines are necessary to protect the health of children and reported refusing the administration of ≥1 vaccine dose of any vaccine type.

^dGroup 3 consists of children whose parents did not believe that vaccines are necessary to protect the health of children.