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dc.contributor.authorWinther, Anne
dc.contributor.authorDennison, Elaine
dc.contributor.authorAhmed, Luai Awad
dc.contributor.authorFurberg, Anne-Sofie
dc.contributor.authorGrimnes, Guri
dc.contributor.authorJorde, Rolf
dc.contributor.authorGjesdal, Clara Gram
dc.contributor.authorEmaus, Nina
dc.date.accessioned2016-02-24T08:54:49Z
dc.date.available2016-02-24T08:54:49Z
dc.date.issued2014-06-04
dc.description.abstractSummary: Bone mass achievement predicts later fracture risk. This population-based study describes bone mineral density levels (BMD) and associated factors in Norwegian adolescents. Compared with international reference ranges, BMD levels appear higher and physical activity levels are positively associated with BMD. <p>Purpose: Norway has one of the highest reported incidences of osteoporotic fractures. Maximization of peak bone mass may prevent later fractures. This population-based study compared BMD levels of Norwegian adolescents with international reference ranges and explored associated factors. <p>Methods: All first year upper secondary school students, aged 15-19 years in the Tromsø region were invited to the Fit Futures study in 2010-2011. Over 90% of the invited participants attended, 508 girls and 530 boys. BMD was measured at total hip, femoral neck and total body by dual x-ray absorptiometry. Lifestyle variables were collected by self-administered questionnaires and interviews. All analyses were performed sex stratified, using linear regression models. <p>Results: In girls mean BMD (SD) was 1.060 (0.124), 1.066 (0.123) and 1.142 (0.077) g/cm² at the total hip, femoral neck and total body respectively. In boys corresponding values were 1.116 (0.147), 1.103 (0.150) and 1.182 (0.097), with significant higher values than the Lunar pediatric reference at 16 years of age In girls, height and self-reported intensive physical activity of more than four hours a week and early sexual maturation were positively associated with BMD at both femoral sites (p<0.047). Among boys age, height, body mass index, physical activity and alcohol intake were positively (p<0.038), whereas early stages of sexual maturation and smoking was negatively (p<0.047) related to BMD. <p>Conclusions: Despite the heavy fracture burden, Norwegian adolescents´ BMD levels are higher than agematched Caucasians. Physical activity is associated with 1 SD increased BMD levels in those involved in competition or hard training.en_US
dc.descriptionThis is the accepted manuscript version. Published version is available at <a href=http://dx.doi.org/10.1007/s11657-014-0185-0>http://dx.doi.org/10.1007/s11657-014-0185-0</a>en_US
dc.identifier.citationArchives of Osteoporosis 2014, 9:185en_US
dc.identifier.cristinIDFRIDAID 1162480
dc.identifier.doi10.1007/s11657-014-0185-0
dc.identifier.issn1862-3514
dc.identifier.urihttps://hdl.handle.net/10037/8543
dc.identifier.urnURN:NBN:no-uit_munin_8122
dc.language.isoengen_US
dc.publisherSpringeren_US
dc.rights.accessRightsopenAccess
dc.subjectVDP::Medisinske fag: 700::Klinisk medisinske fag: 750::Reumatologi: 759en_US
dc.subjectVDP::Midical sciences: 700::Clinical medical sciences: 750::Rheumatology: 759en_US
dc.subjectPopulation-based studyen_US
dc.subjectAdolescentsen_US
dc.subjectDXAen_US
dc.subjectSexual maturationen_US
dc.subjectPhysical activityen_US
dc.subjectBone mineral densityen_US
dc.titleThe Tromsø Study: Fit Futures: a study of Norwegian adolescents' lifestyle and bone healthen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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