Obesity in children and adolescents is a global health issue with increasing prevalence in low-income and middle-income countries (LMICs) as well as a high prevalence in many high-income countries.[9]Jebeile H, Kelly AS, O'Malley G, et al. Obesity in children and adolescents: epidemiology, causes, assessment, and management. Lancet Diabetes Endocrinol. 2022 May;10(5):351-65.
http://www.ncbi.nlm.nih.gov/pubmed/35248172?tool=bestpractice.com
In 2019, the World Obesity Federation estimated there would be 206 million children and adolescents aged 5-19 years living with obesity in 2025, and 254 million in 2030.[10]World Obesity Federation. Lobstein T, Brinsden H: Atlas of childhood obesity. 2019 [internet publication].
worldobesity.org/membersarea/global-atlas-on-childhood-obesity
In the US, data obtained from the National Health and Nutrition Examination Survey (NHANES) demonstrate that the prevalence of obesity among US children has been increasing since 1990.[5]Skinner AC, Ravanbakht SN, Skelton JA, et al. Prevalence of obesity and severe obesity in US children, 1999-2016. Pediatrics. 2018 Mar;141(3):e20173459.
https://pediatrics.aappublications.org/content/141/3/e20173459.long
http://www.ncbi.nlm.nih.gov/pubmed/29483202?tool=bestpractice.com
Boys and girls are affected equally.[5]Skinner AC, Ravanbakht SN, Skelton JA, et al. Prevalence of obesity and severe obesity in US children, 1999-2016. Pediatrics. 2018 Mar;141(3):e20173459.
https://pediatrics.aappublications.org/content/141/3/e20173459.long
http://www.ncbi.nlm.nih.gov/pubmed/29483202?tool=bestpractice.com
NHANES data from 2017 to March 2020 showed that 12.7% of 2- to 5-year-olds, 20.7% of children aged 6-11 years, and 22.2% of people aged 12-19 years had obesity.[11]Stierman B, Afful J, Carroll MD, et al. National Health and Nutrition Examination Survey 2017-March 2020 prepandemic data files-development of files and prevalence estimates for selected health outcomes. Natl Health Stat Report. 2021 Jun 14;(158):106273.
https://pmc.ncbi.nlm.nih.gov/articles/PMC11513744
http://www.ncbi.nlm.nih.gov/pubmed/39380201?tool=bestpractice.com
Among adolescents with obesity, the most rapid weight gain has been shown to occur between 2 and 6 years.[12]Geserick M, Vogel M, Gausche R, et al. Acceleration of BMI in early childhood and risk of sustained obesity. N Engl J Med. 2018 Oct 4;379(14):1303-12.
https://www.nejm.org/doi/10.1056/NEJMoa1803527
http://www.ncbi.nlm.nih.gov/pubmed/30281992?tool=bestpractice.com
Non-Hispanic African-American children and Hispanic children had higher prevalence of overweight and all classes of obesity compared with other races. Asian-American children had markedly lower rates of overweight and all classes of obesity.[5]Skinner AC, Ravanbakht SN, Skelton JA, et al. Prevalence of obesity and severe obesity in US children, 1999-2016. Pediatrics. 2018 Mar;141(3):e20173459.
https://pediatrics.aappublications.org/content/141/3/e20173459.long
http://www.ncbi.nlm.nih.gov/pubmed/29483202?tool=bestpractice.com
Native American and Alaska Native children have a high prevalence of severe obesity, and obesity develops at a younger age in this population.[13]Bell S, Deen JF, Fuentes M, et al; Committee on Native American Child Health. Caring for American Indian and Alaska Native children and adolescents. Pediatrics. 2021 Apr;147(4):e2021050498.
https://pediatrics.aappublications.org/content/147/4/e2021050498
http://www.ncbi.nlm.nih.gov/pubmed/33753539?tool=bestpractice.com
Overall estimates of childhood obesity tend to be higher in the US as compared with other countries.[5]Skinner AC, Ravanbakht SN, Skelton JA, et al. Prevalence of obesity and severe obesity in US children, 1999-2016. Pediatrics. 2018 Mar;141(3):e20173459.
https://pediatrics.aappublications.org/content/141/3/e20173459.long
http://www.ncbi.nlm.nih.gov/pubmed/29483202?tool=bestpractice.com
The National Child Measurement Programme in England 2022-2023 report found that obesity prevalence among 4- and 5-year-olds was 9.2% which rose to 22.7% among 10- to 11-year-olds.[14]National Health Service. National Child Measurement Programme, England, 2022/23 school year: part 1: age, time series and sex. Oct 2023 [internet publication].
https://digital.nhs.uk/data-and-information/publications/statistical/national-child-measurement-programme/2022-23-school-year/age
In England, data collected from mainstream state-maintained schools demonstrated that the prevalence of children aged 4-5 (those in 'reception' school classes) living with obesity in England during 2022-2023 was over twice as high in the most deprived areas (12.4%) than in the least deprived areas (5.8%). This difference was also seen in ages 10-11 (those in 'Year 6' school classes) with 30.2% living with obesity in the most deprived areas compared with 13.1% in the least deprived areas.[15]National Child Measurement Programme, England, 2022/23 school year: part 4: deprivation (based on postcode of the child). Oct 2023 [internet publication].
https://digital.nhs.uk/data-and-information/publications/statistical/national-child-measurement-programme/2022-23-school-year/deprivation-based-on-postcode-of-the-child