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Abstract
To date, Ontario public health units (PHUs) have generally neglected the social determinants of health (SDH) concept in favor of risk aversion and behaviorally oriented health promotion approaches. Addressing SDH and responding to the presence of health inequities is required under the Ontario Public Health Standards and is a component of provincial public health documents and reports. Nevertheless, units vary in their understanding and application of the SDH concept in their activities. The authors conducted 18 interviews with Medical Officers of Health and lead staff persons from nine Ontario PHUs, in order to better understand how these differences in addressing the SDH among health units come about. The findings suggest that differences in practice largely result from epistemological variations: conceptions of the SDH; the perceived role of public health in addressing them; and understandings concerning the validity of differing forms of evidence and expected outcomes. Drawing from Bachelard’s concept of epistemological barriers and Raphael’s seven discourses on the SDH, we examine the ways in which the participating units discuss and apply the SDH concepts. We argue that a substantial barrier to further action on the SDH is the internalization of discourses and traditions that treat health as individualized and depoliticized.