Effects of Interventions on MMR Misperceptions

Vaccines Cause AutismMMR Side Effects
Autism correction0.55* (0.38–0.79)0.81 (0.57–1.15)
Disease risks1.15 (0.79–1.67)0.93 (0.65–1.35)
Disease narrative1.35 (0.91–2.01)1.92* (1.33–2.77)
Disease images1.47* (1.02–2.13)1.18 (0.82–1.69)
Somewhat favorable toward vaccines (baseline: least favorable)0.22* (0.16–0.30)0.49* (0.37–0.6)
Most favorable toward vaccines (baseline: least favorable)0.06* (0.04–0.08)0.23* (0.17–0.31)
  • Ordered logit models with coefficients expressed as aORs and 95% confidence intervals in parentheses (cutpoints omitted; * P < 0.05). “Vaccines cause autism” measures agreement on a 5-point scale from “Strongly disagree” (1) to “Strongly agree” (5) to the statement “Some vaccines cause autism in healthy children.” “MMR side effects” measures responses on a 6-point scale from “Very unlikely” (1) to “Very likely” (6) to the question “Just based on what you know, how likely is it that children who get the measles, mumps, and rubella vaccine, which is known as the MMR vaccine, will suffer serious side effects?” The experimental interventions are provided in the Supplemental Information.