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Changes in BMI-distribution from 1966-69 to 1995-97 in adolescents. The Young-HUNT study, Norway

Bjørnelv, Sigrid; Lydersen, Stian; Mykletun, Arnstein; Holmen, Turid Lingaas
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/1588817
Date
2007
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  • Institutt for klinisk og molekylær medisin [2072]
  • Institutt for samfunnsmedisin og sykepleie [1769]
  • Publikasjoner fra CRIStin - NTNU [21000]
Original version
BMC Public Health 2007, 7   10.1186/1471-2458-7-279
Abstract
Background: The aim of this study was to explore changes in the BMI-distribution over time

among Norwegian adolescents.

Methods: Height and weight were measured in standardised ways and BMI computed in 6774

adolescents 14–18 years who participated in the Young-HUNT study, the youth part of the Healthstudy

of Nord-Trondelag County, Norway in 1995–97. The results were compared to data from

8378 adolescents, in the same age group and living in the same geographical region, collected by

the National Health Screening Service in 1966–69.

Results: From 1966–69 to 1995–97 there was an increased dispersion and a two-sided change in

the BMI-distribution. Mean BMI did not increase in girls aged 14–17, but increased significantly in

18 year old girls and in boys of all ages. In both sexes and all ages there was a significant increase

in the upper percentiles, but also a trend towards a decrease in the lowest percentiles. Height and

weight increased significantly in both sexes and all ages.

Conclusion: The increased dispersion of the BMI-distribution with a substantial increase in upper

BMI-percentiles followed the same pattern seen in other European countries and the United States.

The lack of increase in mean BMI among girls, and the decrease in the lowest percentiles has not

been acknowledged in previous studies, and may call for attention.
Publisher
BioMed Central
Journal
BMC Public Health

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