Among the structural factors, lower education levels are associated with stronger beliefs in conspiracy theories, but the difference is not statistically significant (F-value = 0.922, p-value = 0.337). Beliefs in conspiracy theories are high among households with incomes below 300 million won and are relatively lower in the two groups with incomes of 300 million won or more (F-value = 3.368, p-value = 0.035). The more knowledgeable the respondents are and the better their quality of information is, the lower their beliefs in conspiracy theories (knowledge, F-value = 7.905, p-value = 0.005; quality of information; F-value = 211.000, p-value = 0.000). In particular, the wide gap in groups with the high and low information suggests that the quality of information is very important. Notably, differences in the amount of information are not associated with any difference in conspiracy beliefs (F-value = 0.916, p-value = 0.339). This result suggests that the quality of information is more important than the quantity of information. Health status has no significant effect (F-value = 0.027, p-value = 0.870), whereas the change in health status (worse) after COVID-19 does have a significant effect (F-value = 127.523, p-value = 0.000). These results show that health changes according to variations in context are more important than everyday health status. Finally, neither gender nor age has a statistically significant impact (gender, F-value = 0.422, p-value = 0.516; age, F-value = 0.695, p-value = 0.596).