Adjusted risk ratio for voting by physicians, healthcare professionals, and non-healthcare professionals compared to the general public, 2004–2018. Note: The total number of respondents was 750,236 individuals including 3009 physicians, 7094 healthcare professionals, and 18,335 non-healthcare professionals. Adjusted risk ratio (ARR) is estimated from multivariable logistic regression against the comparison group of the general population, controlling for the following: year, household income, age, gender, marital status, rural, employment, race/ethnicity, education, duration at residence, region, and number of children.