• Sean M Phelan, John F Dovidio, Rebecca M Puhl, Diana J Burgess, David B Nelson, Mark W Yeazel, Rachel Hardeman, Sylvia Perry, and Michelle van Ryn.
• Division of Health Care Policy and Research, Mayo Clinic, Rochester, Minnesota, USA.
• Obesity (Silver Spring). 2014 Apr 1; 22 (4): 1201-8.

ObjectiveTo examine the magnitude of explicit and implicit weight biases compared to biases against other groups; and identify student factors predicting bias in a large national sample of medical students.MethodsA web-based survey was completed by 4,732 1st year medical students from 49 medical schools as part of a longitudinal study of medical education. The survey included a validated measure of implicit weight bias, the implicit association test, and 2 measures of explicit bias: a feeling thermometer and the anti-fat attitudes test.ResultsA majority of students exhibited implicit (74%) and explicit (67%) weight bias. Implicit weight bias scores were comparable to reported bias against racial minorities. Explicit attitudes were more negative toward obese people than toward racial minorities, gays, lesbians, and poor people. In multivariate regression models, implicit and explicit weight bias was predicted by lower BMI, male sex, and non-Black race. Either implicit or explicit bias was also predicted by age, SES, country of birth, and specialty choice.ConclusionsImplicit and explicit weight bias is common among 1st year medical students, and varies across student factors. Future research should assess implications of biases and test interventions to reduce their impact.Copyright © 2013 The Obesity Society.

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