title: Evolution of overweight prevalence among 5-6-year-old children according to socio-economic status.
abstract: OBJECTIVE
  To assess time trends in overweight and obesity prevalence among 5-6-year-old children of Bordeaux city (France) over seven school years from 2004-2005 to 2010-2011.
  
  
  METHODS
  For each year, all 5-6-year-old children from 63 of the 69 schools of Bordeaux were included: 2005, 2100, 2010, 1952, 2040, 2017 and 2111 subjects, respectively. Weight and height were collected by school doctors, and weight status was defined according to the age- and sex-specific body mass index cut-off points of the International Obesity Task Force (IOTF) for obesity and to the French age- and gender-specific child cut-off (close to the IOTF cut-off) for overweight including obesity.
  
  
  RESULTS
  From 2004-2005 to 2010-2011, an overall decrease was observed in overweight including obesity (from 8.9% to 5.2%, p < 0.001) and obesity prevalences (from 2.8% to 1.4%, p = 0.046). Similar results were observed in non-low socio-economic status (SES) areas (p < 0.001), whereas the prevalence did not vary significantly in low-SES areas (p > 0.05).
  
  
  CONCLUSIONS
  Overweight prevalence has decreased between 2004 and 2011 in 5-6-year-old children from Bordeaux. However, the gap between low and non-low-SES areas has persisted during these years.
authors.affiliation: University of Bordeaux, ISPED, Centre INSERM U897-Epidemiologie-Biostatistique, Bordeaux, France. HeleneThibault@aol.com
authors.forename: Hélène
authors.initials: H
authors.lastname: Thibault
authors.forename: Caroline
authors.initials: C
authors.lastname: Carriere
authors.forename: Coralie
authors.initials: C
authors.lastname: Langevin
authors.forename: Pascale
authors.initials: P
authors.lastname: Barberger-Gateau
authors.forename: Sylvie
authors.initials: S
authors.lastname: Maurice
mesh_terms: D000367:Age Factors; D015992:Body Mass Index; D002648:Child; D002675:Child, Preschool; D005260:Female; D005602:France; D006801:Humans; D008297:Male; D009765:Obesity / Q000453:epidemiology* / Q000517:prevention & control; D015995:Prevalence; D011314:Preventive Health Services / Q000458:organization & administration*; D012307:Risk Factors; D012923:Social Class; D013997:Time Factors