Document Detail

Development of adiposity in adolescence: five year longitudinal study of an ethnically and socioeconomically diverse sample of young people in Britain.
MedLine Citation:
PMID:  16679329     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To examine the developmental trajectory of obesity in adolescence in relation to sex, ethnicity, and socioeconomic status.
DESIGN: Five year longitudinal cohort study of a socioeconomically and ethnically diverse sample of school students aged 11-12 years at baseline.
SETTING: 36 London schools recruited to the study in 1999 by a stratified random sampling procedure.
PARTICIPANTS: 5863 students participated in one or more years.
MAIN OUTCOME MEASURES: Weight, height, and waist circumference measured annually by trained researchers; overweight and obesity defined according to International Obesity Task Force criteria; adiposity and central adiposity indexed by body mass index (BMI) and waist standard deviation scores relative to 1990 British reference values.
RESULTS: In school year 7 (age 11-12), the prevalence of overweight and obesity combined was almost 25%, with higher rates in girls (29%) and students from lower socioeconomic backgrounds (31%) and the highest rates in black girls (38%). Prevalence of obesity increased over the five years of the study at the expense of overweight, but no reduction occurred in the proportion of students with BMIs in the healthy range. Waist circumferences were high compared with 1990 norms at age 11 (by 0.79 SD in boys and by 1.15 SD in girls) and increased further over time. Both BMI and waist circumference tracked strongly over the five years.
CONCLUSIONS: Prevalence of overweight and obesity was high in London school students, with significant socioeconomic and ethnic inequalities. Little evidence was found of new cases of overweight or obesity emerging over adolescence, but few obese or overweight adolescents reduced to a healthy weight. The results indicate that persistent obesity is established before age 11 and highlight the need to target efforts to prevent obesity in the early years.
Jane Wardle; Naomi Henning Brodersen; Tim J Cole; Martin J Jarvis; David R Boniface
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Publication Detail:
Type:  Journal Article; Multicenter Study; Research Support, Non-U.S. Gov't     Date:  2006-05-05
Journal Detail:
Title:  BMJ (Clinical research ed.)     Volume:  332     ISSN:  1756-1833     ISO Abbreviation:  BMJ     Publication Date:  2006 May 
Date Detail:
Created Date:  2006-05-12     Completed Date:  2006-05-24     Revised Date:  2013-06-07    
Medline Journal Info:
Nlm Unique ID:  8900488     Medline TA:  BMJ     Country:  England    
Other Details:
Languages:  eng     Pagination:  1130-5     Citation Subset:  AIM; IM    
Cancer Research UK Health Behaviour Unit, Department of Epidemiology and Public Health, University College London, London WC1E 6BT.
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MeSH Terms
Adipose Tissue / pathology*
Adiposity / ethnology,  physiology*
Cohort Studies
London / epidemiology
Longitudinal Studies
Obesity / epidemiology*,  pathology
Overweight / ethnology,  physiology
Sex Factors
Socioeconomic Factors
Subcutaneous Fat, Abdominal / pathology
Waist-Hip Ratio
Grant Support
G9827821//Medical Research Council; G9827821(62595)//Medical Research Council

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