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Increasing rate of weight loss among schoolchildren, especially girls, in Sweden
Örebro University, Department of Business, Economics, Statistics and Informatics.
2007 (English)In: Journal of Adolescent Health, ISSN 1054-139X, E-ISSN 1879-1972, Vol. 40, no 3, p. 238-244Article in journal (Refereed) Published
Abstract [en]

Purpose: This study compared the rates of relative weight loss (body mass index, BMI) among boys and girls, from age 7 to 18 years, in two birth cohorts to determine changing patterns over time. Methods: Samples from two Swedish national birth cohorts, 1973 and 1981 (all children born on the 15th day of every month), with few missing cases (4.5% and 1.6%, respectively), were studied. Data (height and weight) were collected from school health records and analyzed longitudinally. Episodes of more than 5% reduction in BMI for 3530 boys and girls born in 1973 and 3041 boys and girls born in 1981 were analyzed and compared. Results: An increased rate in 1981 compared with 1973 of relative weight reduction episodes was found for both boys and girls. The increase for girls was most: pronounced, started from a higher rate, and was seen in nearly all body weight categories and in all ages. For boys, the reductions increased for all body weight categories in the age interval 7-9 years; otherwise, the pattern was much more heterogeneous. Body weight and reduction of BMI were highly correlated in both cohorts, as more of the overweight than the thinner children reduced their BMI. For girls, the increase in rate reduction between 1981 and 1973 was highest among the thinnest individuals. Conclusions: Both boys and, especially, girls had an increased rate of weight loss in two longitudinal cohorts. Whether healthy or unhealthy behavior is causing the increase needs to be investigated further. (C) 2007 Society for Adolescent Medicine. All rights reserved.

Place, publisher, year, edition, pages
2007. Vol. 40, no 3, p. 238-244
National Category
Probability Theory and Statistics
Research subject
Statistics
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URN: urn:nbn:se:oru:diva-19929DOI: 10.1016/j.jadohealth.2006.09.019ISI: 000244620700008OAI: oai:DiVA.org:oru-19929DiVA, id: diva2:447922
Available from: 2011-10-13 Created: 2011-10-12 Last updated: 2017-12-08Bibliographically approved

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Bodin, Lennart

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