title: Weight development from age 13 to 30 years and adolescent socioeconomic status: The Norwegian Longitudinal Health Behaviour study.
abstract: OBJECTIVE
  To describe the weight development and model change in body mass index (BMI), and to examine the association of adolescent socioeconomic status (SES) with change in BMI distribution in a cohort followed from adolescence through adulthood.
  
  
  METHODS
  Participants (n = 924) from western Norway were surveyed seven times from age 13 to 30 (1990-2007). BMI was based on self-reported height and weight. Quantile regression analyses were used to model change in weight development and to investigate associations between SES (measured by parental education) and change in BMI distribution. The analyses were adjusted for curvilinearity in BMI development, gender and relevant health behaviours.
  
  
  RESULTS
  Body mass index increased over time with the greatest increase in the 90th percentile. No significant associations between change in BMI and SES were observed at any of the percentiles (10th, 25th, 50th, 75th or 90th).
  
  
  CONCLUSIONS
  Those in the upper BMI percentile gained more weight than those in the lower percentiles indicating that these might need targeted interventions. Further investigation of the association of change in BMI and SES with better quality data might be warranted.
authors.affiliation: Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316, Oslo, Norway.
authors.forename: Ingunn Holden
authors.initials: IH
authors.lastname: Bergh
authors.affiliation: Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316, Oslo, Norway.
authors.forename: Øivind
authors.initials: Ø
authors.lastname: Skare
authors.affiliation: Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316, Oslo, Norway.
authors.forename: Annalena
authors.initials: A
authors.lastname: Aase
authors.affiliation: Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316, Oslo, Norway.
authors.forename: Knut-Inge
authors.initials: KI
authors.lastname: Klepp
authors.affiliation: Department of Nutrition, Faculty of Medicine, University of Oslo, P.O. Box 1046, Blindern, 0316, Oslo, Norway. nanna.lien@medisin.uio.no.
authors.forename: Nanna
authors.initials: N
authors.lastname: Lien
mesh_terms: D000293:Adolescent; D041923:Adolescent Development; D000328:Adult; D000367:Age Factors; D015992:Body Mass Index; D001835:Body Weight; D004032:Diet; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006801:Humans; D008137:Longitudinal Studies; D008297:Male; D009664:Norway / Q000453:epidemiology; D057185:Sedentary Behavior; D012737:Sex Factors; D012907:Smoking / Q000453:epidemiology; D012923:Social Class; D055815:Young Adult
keywords: Adolescents; Adults; Body mass index; Socioeconomic status; Weight gain