#2 - Obesity-prevalence, consequences. energy balance (3-29)

#2 - Obesity-prevalence, consequences. energy balance...

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  NST 160 Epidemic of Obesity and Dynamic Nature of Energy Balance Marc K. Hellerstein, M.D., Ph.D. Professor of Human Nutrition (D.H. Calloway Chair), University of California Berkeley; Professor of Endocrinology, Metabolism and Nutrition, Dept. of Medicine, University of California at San Francisco
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  I) Modern epidemic of obesity -- Changing demographics in US and world II) Consequences of overweight/obesity: why care? III) Dynamic nature of energy balance -- A thought experiment V) Summary Outline
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  Best defined as a disorder of body fat (excess body fatness) Identified in practice usually by body weight, or BMI (Body Mass Index = kg/m 2 ) BMI > 30 (obese) BMI> 27 (overweight) Criterea for obesity vary by age and sex What is Obesity?
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  1) Prevalence is increasing in the US and the world - Increase from 15% to 33% in US adults, since 1976-80 1) Becoming international disease, not just in affluent countries 2) Becoming disease of youth, not just middle age and older 3) Is highly related to cardiovascular disease and diabetes mellitus 4) Cardiovascular disease is now, for 1 st time in history, the leading cause of death in the world, and is highly correlated with prevalence of obesity Obesity is an Epidemic with Remarkably Changing Demographics
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Obesity in the United States 62% of adult Americans are overweight 31% of adult Americans are obese 6.8% of US health care costs are for obesity related disorders 400,000 deaths a year in the US can be attributed to obesity
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Source: CDC/NCHS
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Obesity Trends* Among U.S. Adults BRFSS, 1985 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1986 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1987 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1988 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1989 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1990 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14%
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Obesity Trends* Among U.S. Adults BRFSS, 1991 (*BMI ≥30, or ~ 30 lbs. overweight for 5’ 4” person) No Data <10% 10%–14% 15%–19%
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This document was uploaded on 05/07/2010.

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#2 - Obesity-prevalence, consequences. energy balance...

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