Medical conspiracy theories and health behaviors in the United States.

Methods | To determine the extent of “medical conspiracism” in the American public, a nationally representative, onlinesurvey sample of 1351 adults was collected in August and September of 2013 by Internet market research company YouGov. The survey results were then weighted to provide a representative sample of the population and have the same degree of accuracy as in-person or telephone surveys.1 This research was approved by the institutional review board of the University of Chicago. Respondents who took part in the survey gave their written consent.