Shared norms and their explanation for the social clustering of obesity

Daniel Hruschka, Alexandra Slade, Amber Wutich, Benjamin Morin

Research output: Contribution to journalArticlepeer-review

56 Scopus citations


Objectives: We aimed to test the hypothesized role of shared body size norms in the social contagion of body size and obesity. Methods: Using data collected in 2009 from 101 women and 812 of their social ties in Phoenix, Arizona, we assessed the indirect effect of social norms on shared body mass index (BMI) measured in 3 different ways. Results: We confirmed Christakis and Fowler's basic finding that BMI and obesity do indeed cluster socially, but we found that body size norms accounted for only a small portion of this effect (at most 20%) and only via 1 of the 3 pathways. Conclusions: If shared social norms play only a minor role in the social contagion of obesity, interventions targeted at changing ideas about appropriate BMIs or body sizes may be less useful than those working more directly with behaviors, for example, by changing eating habits or transforming opportunities for and constraints on dietary intake.

Original languageEnglish (US)
Pages (from-to)S295-S300
JournalAmerican journal of public health
Issue numberSUPPL. 1
StatePublished - Dec 1 2011

ASJC Scopus subject areas

  • Public Health, Environmental and Occupational Health


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