• Overview
  • Obesity prevalence
  • Trends over time
  • Contextual factors
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Obesity prevalence

Adults, 2017-2018

Survey type:Measured
Age:18+
Sample size:5429
Area covered:National
References:Reanalysis of NHANES 2017/18 by Rachel Jackson Leach, Jaynaide Powis World Obesity Federation
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2015-2016

Survey type:Measured
Age:20+
Sample size:5406
Area covered:National
References:NHANES 2015/16. Analysis conducted by the World Obesity Federation, Caroline Litts, Fiona Montague & R Jackson-Leach 2017
Notes:Weighted
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2013-2014

Survey type:Measured
Age:20+
Sample size:5455
Area covered:National
References:Flegal KM, Kruszon-Moran D, Carroll MD, Fryar CD, Ogden CL. Trends in Obesity Among Adults in the United States, 2005 to 2014. JAMA. 2016;315(21):2284-2291. doi:10.1001/jama.2016.6458.
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2011-2012

Survey type:Measured
Age:20+
Sample size:5181
Area covered:National
References:Ruopeng An, “Prevalence and Trends of Adult Obesity in the US, 1999–2012”, ISRN Obesity, vol. 2014, Article ID 185132, 6 pages, 2014. doi:10.1155/2014/185132
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2009-2010

Survey type:Measured
Age:20+
Sample size:5926
Area covered:National
References:NHANES Survey - Published in Flegal KM, Carrolll MD, Kit BK, Ogden CL. Prevalence of Obesity and Trends in the Distribution of Body Mass Index Among US Adults, 1999-2010. JAMA Published online January 17, 2012. doi: 10.1001/jama.2012.39
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2007-2008

Survey type:Measured
Age:20+
Sample size:5555
Area covered:National
References:Flegal KM, Carroll MD, Ogden CL and Curtin LR. (2010). Prevalence and trends in obesity among US adults, 1999-2008. Journal of the American Medical Association, 303 (3): 235 - 241.
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2003-2004

Survey type:Measured
Age:20+
Sample size:4431
Area covered:National
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA,Tabak CJ, & Flegal KM. (2006). Prevalence of Overweight and Obesity in the United States, 1999-2004. The Journal of the American Medical Association, Vol 295(13):1549 - 1555.
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2003

Survey type:Measured
Age:20+
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Notes:1999-2000, 2001-2, 2003-4
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2001-2002

Survey type:Measured
Age:20+
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 2000

Survey type:Measured
Age:20+
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Notes:1999-2000, 2001-2, 2003-4
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1999-2000

Survey type:Measured
Age:20-74
Sample size:3601
References:Centres for Disease Control and Prevention. http://www.cdc.gov/
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1999

Survey type:Measured
Age:20+
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Notes:1999-2000, 2001-2, 2003-4
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1991

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Notes:1971-74 (marked as 1973), 1988-94 marked as 1991
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1988-1994

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1976

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Notes:1971-74 (marked as 1973), 1988-94 marked as 1991
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1973

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Notes:1971-74 (marked as 1973), 1988-94 marked as 1991
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1971-1974

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1960-1962

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Adults, 1960

Survey type:Measured
Age:20-74
References:Flegal KM, Carroll MD, Kuczmarski RJ, Johnson CL. Overweight and obesity in the United States: prevalence and trends, 1960-1994. International Journal of Obesity (1998);22:39-47
Notes:1971-74 (marked as 1973), 1988-94 marked as 1991
Unless otherwise noted, overweight refers to a BMI between 25kg and 29.9kg/m², obesity refers to a BMI greater than 30kg/m².

Children, 2017-2018

Survey type:Measured
Age:5-17
Sample size:2086
Area covered:National
References:Reanalysis of NHANES 2017/18 by Rachel Jackson Leach, Jaynaide Powis World Obesity Federation
Cutoffs:IOTF

Children, 2015-2016

Survey type:Measured
Age:5-17
Sample size:2398
Area covered:National
References:NHANES 2015/16. Analysis conducted by the World Obesity Federation, Caroline Litts, Fiona Montague & R Jackson-Leach 2017
Notes:Weighted
Cutoffs:IOTF

Children, 2013-2014

Survey type:Measured
Sample size:1927
Area covered:National
References:Data from NHANES 2013/14. Data reanalysed by Danielle Sharfman (University of Wisconsin-Madison), Rachel Jackson Leach on behalf of the World Obesity Federation
Notes:Sample size based on 5-9yrs, 13-17yrs IOTF International Cut off
Cutoffs:IOTF

Children, 2011-2012

Survey type:Measured
Age:6-11
Sample size:1268
Area covered:National
References:Ogden CL, Carroll MD, Kit BK, Flegal KM. Prevalence of childhood and adult obesity in the United States, 2011-2012. JAMA (2014)26;311(8):806-14.
Notes:85th & 95th Centile CDC cut off
Cutoffs:CDC

Children, 2009-2010

Survey type:Measured
Age:5-17
Sample size:2435
Area covered:National
References:NHANES IASO analysis
Notes:IOTF cut off (monthly)
Cutoffs:IOTF

Children, 2003-2004

Survey type:Measured
Age:6-17
Sample size:2613
Area covered:National
References:Lobstein T, Jackson - Leach R. Child overweight and obesity in the USA: prevalence rates according to IOTF definitions. Int J Pediatr Obes. 2007;2(1):62-4.
Notes:IOTF Cut off. Reference: Cole TJ, Bellizzi MC, Flegal KM, Dietz WH. Establishing a standard definition for child overweight and obesity worldwide: International survey. BMJ. 2000 May 6;320(7244):1240-3.
Cutoffs:IOTF

Children, 2001-2002

Survey type:Measured
Age:6-11
Sample size:4258
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Notes:Child Cut-Off: 85/95 Centile (see paper for further details)
Cutoffs:Other

Children, 1999-2000

Survey type:Measured
Age:6-11
Sample size:4018
References:Ogden CL, Carroll MD, Curtin LR, McDowell MA, Tabak CJ, Flegal KM. Prevalence of Overweight and Obesity in the United States, 1999-2004. JAMA 2006;295(13):1549-1555
Notes:Cut-off point: 85/95 Centile (see paper for further details)
Cutoffs:Other

Children, 1988-1994

Survey type:Measured
Age:6-17
Sample size:6108
References:Wang Y, Monteiro C, Popkin B. Trends of obesity and underweight in older children and adolescents in the United States, Brazil, China, and Russia. American Journal of Clinical Nutrition 2002;75:971-7
Notes:IOTF Cut off. Reference: Cole TJ, Bellizzi MC, Flegal KM, Dietz WH. Establishing a standard definition for child overweight and obesity worldwide: International survey. BMJ. 2000 May 6;320(7244):1240-3
Cutoffs:IOTF

Children, 1971-1974

Survey type:Measured
Age:6-17
Sample size:4471
References:Wang Y, Monteiro C, Popkin B. Trends of obesity and underweight in older children and adolescents in the United States, Brazil, China, and Russia. American Journal of Clinical Nutrition 2002;75:971-7
Notes:IOTF Cut off. Reference: Cole TJ, Bellizzi MC, Flegal KM, Dietz WH. Establishing a standard definition for child overweight and obesity worldwide: International survey. BMJ. 2000 May 6;320(7244):1240-3
Cutoffs:IOTF

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