Table 2: Demographic characteristics as predictors for Internet use as a source of vaccine information among parents of school aged children.

CharacteristicsInternet used as a source of vaccine
Unadjusted OR
(95% CI)
Adjusted OR* (95% CI)
Yes ( )††No ( )††
(%) (%)

Older parent age80 (32.7%)378 (38.3%)0.78 (0.58–1.05)0.72 (0.53–0.97)
Higher parent education145 (58.2%)465 (46.3%)1.62 (1.22–2.14)1.49 (1.12–2.00)
Higher household income§105 (47.5%)346 (39.5%)1.39 (1.03–1.87)1.41 (1.04–1.91)
Parent 211 (92.1%)883 (92.7%)0.93 (0.54–1.59)0.78 (0.45–1.37)
Child’s primary healthcare provider39 (15.9%)89 (9.0%)1.91 (1.27–2.86)1.27 (0.83–1.96)
Child is exempt for one or more vaccines**105 (42.2%)172 (17.1%)3.53 (2.61–4.76)N/A

*Adjusted for exemption status.
Parent age is above the median (41 years or older) compared to younger.
Parent’s education level is above the median (college graduate or higher) compared to lower education levels.
§Total household income is above the median ($70,000 or higher) compared to lower household income.
Parent’s race is white compared to all other races/ethnicities.
Child’s primary healthcare provider is not a doctor (nurse, physician’s assistant, chiropractor, homeopathic doctor, or other) compared to doctor/physician.
**Child has nonmedical exemption for one or more vaccine compared to fully vaccinated; odds ratios adjusted by exemption status or stratified on exemption status could not be calculated.
††Counts presented represent the count of nonmissing data, and the corresponding percentage is the percent of respondents in each Internet usage group with nonmissing data that indicated that a given information source was a “Good or excellent source.” Missing data were not consistent over information source. Odds ratios are calculated based on nonmissing results through unadjusted and adjusted logistic regression.