{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,19]],"date-time":"2026-02-19T16:33:22Z","timestamp":1771518802359,"version":"3.50.1"},"reference-count":18,"publisher":"MDPI AG","issue":"15","license":[{"start":{"date-parts":[[2021,7,23]],"date-time":"2021-07-23T00:00:00Z","timestamp":1626998400000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJERPH"],"abstract":"<jats:p>Body mass index (BMI) is thought to reflect excess adiposity in both youth and adults alike. However, the association between BMI and fatness varies, especially as children grow into adults. Thus, the present study sought to address this issue by characterizing how BMI reflects age and sex differences in body fatness in 7\u201316-year-old children. Methods: This cross-sectional study was conducted with 2150 children and adolescents, aged 7 to 16 years from the city of Santa Cruz do Sul, Brazil. BMI (kg\/m2), and percentage body fat, using tricipital and subscapular folds, were assessed. For statistical analysis, ANOVA and ANCOVA were used. Results: When considered in isolation, there was no significant interaction in the age-by-sex differences in BMI (p = 0.69). However, when we controlled for percent body fatness, the analysis revealed considerable age-by-sex differences in BMI (p &lt; 0.001). Conclusion: For the same body fat (%), there are no differences in BMI in children &lt;10 years.<\/jats:p>","DOI":"10.3390\/ijerph18157833","type":"journal-article","created":{"date-parts":[[2021,7,23]],"date-time":"2021-07-23T10:31:44Z","timestamp":1627036304000},"page":"7833","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["BMI Fails to Reflect the Developmental Changes in Body Fatness between Boys and Girls during Adolescence"],"prefix":"10.3390","volume":"18","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0506-3652","authenticated-orcid":false,"given":"Alan M.","family":"Nevill","sequence":"first","affiliation":[{"name":"Faculty of Education, Health and Wellbeing, University of Wolverhampton, Walsall WS1 3BD, UK"}]},{"given":"C\u00e9zane Priscila","family":"Reuter","sequence":"additional","affiliation":[{"name":"Graduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul 96816-501, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5624-3592","authenticated-orcid":false,"given":"Caroline","family":"Brand","sequence":"additional","affiliation":[{"name":"Graduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul 96816-501, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8335-6947","authenticated-orcid":false,"given":"Anelise Reis","family":"Gaya","sequence":"additional","affiliation":[{"name":"School of Physical Education, Physiotherapy and Dance, Federal University of Rio Grande do Sul, Porto Alegre 90040-060, Brazil"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7571-9181","authenticated-orcid":false,"given":"Jorge","family":"Mota","sequence":"additional","affiliation":[{"name":"Faculty of Sport, University of Porto, 4099-002 Porto, Portugal"}]},{"given":"Jane Dagmar Pollo","family":"Renner","sequence":"additional","affiliation":[{"name":"Graduate Program in Health Promotion, University of Santa Cruz do Sul, Santa Cruz do Sul 96816-501, Brazil"}]},{"given":"Michael J.","family":"Duncan","sequence":"additional","affiliation":[{"name":"Sport, Exercise and Life Sciences Research Centre, Coventry University, Coventry CV1 5FB, UK"}]}],"member":"1968","published-online":{"date-parts":[[2021,7,23]]},"reference":[{"key":"ref_1","unstructured":"WHO (2020). Obesity and Overweight, World Health Organization."},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Motevalli, M., Drenowatz, C., Tanous, D.R., Khan, N.A., and Wirnitzer, K. (2021). Management of Childhood Obesity\u2014Time to Shift from Generalized to Personalized Intervention Strategies. Nutrients, 134.","DOI":"10.3390\/nu13041200"},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"e186","DOI":"10.1038\/nutd.2015.36","article-title":"The need to redefine age- and gender-specific overweight and obese body mass index cutoff points","volume":"511","author":"Nevill","year":"2015","journal-title":"Nutr. Diabetes"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"S56","DOI":"10.1038\/ijo.2008.87","article-title":"BMI-related errors in the measurement of obesity","volume":"32","author":"Rothman","year":"2008","journal-title":"Int. J. Obes."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"681","DOI":"10.3109\/03014460.2011.606832","article-title":"Inverted BMI rather than BMI is a better proxy for percentage of body fat","volume":"38","author":"Nevill","year":"2011","journal-title":"Ann. Hum. Biol."},{"key":"ref_6","first-page":"36","article-title":"Puberty and body composition","volume":"60","author":"Siervogel","year":"2003","journal-title":"Horm. Res."},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Vanderwall, C., Randall Clark, R., Eickhoff, J., and Carrel, A.L. (2017). BMI is a poor predictor of adiposity in young overweight and obese children. BMC Pediatrics, 17.","DOI":"10.1186\/s12887-017-0891-z"},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"S43","DOI":"10.1038\/ijosup.2015.18","article-title":"Association between body mass index and body fat in 9-11-year-old children from countries spanning a range of human development","volume":"5","author":"Katzmarzyk","year":"2015","journal-title":"Int. J. Obes."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"522","DOI":"10.1016\/S0022-3476(99)70220-9","article-title":"BMI: Does it really reflect body fat mass?","volume":"134","author":"Widhalm","year":"1999","journal-title":"J. Pediatrics"},{"key":"ref_10","first-page":"709","article-title":"Skinfold equations for estimation of body fatness in children and youth","volume":"605","author":"Slaughter","year":"1988","journal-title":"Hum. Biol."},{"key":"ref_11","first-page":"1070","article-title":"Cross-validation of the Slaughter skinfold equations for children and adolescents","volume":"25","author":"Janz","year":"1995","journal-title":"Med. Sci. Sports Exerc."},{"key":"ref_12","first-page":"88","article-title":"Correlation between percentage of body fat measured by the Slaughter equation and bio impedance analysis technique in Mexican schoolchildren","volume":"29","author":"Duarte","year":"2014","journal-title":"Nutr. Hosp."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"1417","DOI":"10.3945\/ajcn.113.065961","article-title":"A comparison of the Slaughter skinfold-thickness equations and BMI in predicting body fatness and cardiovascular disease risk factor levels in children","volume":"98","author":"Freedman","year":"2013","journal-title":"Am. J. Clin. Nutr."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"156","DOI":"10.3109\/03014460.2012.660989","article-title":"Estimating total body fat using a skinfold prediction equation in Brazilian children","volume":"39","author":"Hoffman","year":"2012","journal-title":"Ann. Hum. Biol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"638","DOI":"10.1038\/ejcn.2013.285","article-title":"Inverted BMI rather than BMI is a better predictor of DEXA determined body fatness in children","volume":"68","author":"Duncan","year":"2014","journal-title":"Eur. J. Clin. Nutr."},{"key":"ref_16","doi-asserted-by":"crossref","unstructured":"Malina, R.M., Bouchard, C., and Bar-Or, O. (2003). Growth, Maturation and Physical Activity, Human Kinetics.","DOI":"10.5040\/9781492596837"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"507","DOI":"10.1079\/BJN19950055","article-title":"Body mass index: A measure of fatness or leanness?","volume":"73","author":"Nevill","year":"1995","journal-title":"Br. J. Nutr."},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"He, F., Guan, P., Liu, Q., Crabtree, D., Peng, L., and Wang, H. (2017). The relationship between obesity and body compositions with respect to the timing of puberty in Chongqing adolescents: A cross-sectional study. 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