TY - JOUR AU - Burkhauser,Richard V. AU - Cawley,John AU - Schmeiser,Maximilian D. TI - Differences in the U.S. Trends in the Prevalence of Obesity Based on Body Mass Index and Skinfold Thickness JF - National Bureau of Economic Research Working Paper Series VL - No. 15005 PY - 2009 Y2 - May 2009 UR - http://www.nber.org/papers/w15005 L1 - http://www.nber.org/papers/w15005.pdf N1 - Author contact info: Richard V. Burkhauser Cornell University Department of Policy Analysis & Management 259 MVR Hall Ithaca, NY 14853-4401 Tel: 607/255-2097 Fax: 607/255-4071 E-Mail: rvb1@cornell.edu John Cawley 3M24 MVR Hall Department of Policy Analysis and Management and Department of Economics Cornell University Ithaca, NY 14853 Tel: 607/255-0952 Fax: 607/255-4071 E-Mail: jhc38@cornell.edu Maximilian D. Schmeiser Board of Governors of the Federal Reserve System Washington DC 20551 Tel: 202-728-5882 E-Mail: max.schmeiser@frb.gov AB - There are several ways to measure fatness and obesity, each with its own strengths and weaknesses. The primary measure for tracking the prevalence of obesity has historically been body mass index (BMI). This paper compares long-run trends in the prevalence of obesity when obesity is defined using skinfold thickness instead of body mass index (BMI), using data from the full series of U.S. National Health Examination Surveys. The results indicate that when one uses skinfold thicknesses rather than BMI to define obesity, the rise in the prevalence of obesity is detectable ten to twenty years earlier. This underscores the importance of examining multiple measures of fatness when monitoring or otherwise studying obesity. ER -