Table 2. Application of Health Belief Model (HBM) Constructs and Social Norms to Inform the Parent Telephone Survey.

Theoretical Constructs	Items per construct (True / False)
Perceived Susceptibility (HBM)	- Your child is not very likely to get the flu - A healthy 40 y old is more likely to get the flu than your child           - Compared with other children your child’s age, your child is more likely to get the flu
Perceived Severity (HBM)	- The flu is a serious illness
Perceived Benefits (HBM)	- Giving the flu vaccine to children decreases their time out of school           - The flu vaccine is very effective at preventing the flu           - Giving the flu vaccine to children will decrease their parents’ time lost from work           - Children should be vaccinated against diseases in general
Perceived Barriers (HBM)	- Children receive more immunizations than necessary           - Your child’s immune system could be weakened by too many immunizations           - Your child could get sick from the flu vaccine itself           - My child is scared of needles           - Children should only be immunized against serious diseases
Social Norms (TRA)	- Most parents you know take their children for flu vaccine           - Most people important to you think you should give your child a flu vaccine