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Comment & Response
September 27, 2016

Use of Projection Analyses and Obesity Trends

Author Affiliations
  • 1Institut national de santé publique du Québec, Montreal, Canada

Copyright 2016 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.

JAMA. 2016;316(12):1317. doi:10.1001/jama.2016.11962

To the Editor In their analysis of US obesity time trends, Dr Flegal and colleagues1 found no temporal variation in men, but they found both linear and quadratic time trends in women that were independent of age, race/Hispanic origin, education, and smoking status. They stated that “the results … suggest that attempts to extrapolate from past data to possible future trends in obesity prevalence may not provide valid estimates,” and cited 9 published studies of obesity projections as examples. I believe that this conclusion could be misinterpreted and would like to elaborate on the intended purpose and rationale behind projection analyses.

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