title: Socioeconomic status is not inversely associated with overweight in preschool children.
abstract: OBJECTIVE
  To assess whether socioeconomic inequalities were already present in preschool children.
  
  
  METHODS
  We used data from 2954 Dutch children participating in a longitudinal birth cohort study. Indicators of socioeconomic status were mother's educational level and household income. Body mass index (BMI)-for-age standard deviation scores were derived from a national reference. Overweight was defined at 24 and 36 months according to age- and sex-specific cut-off points for BMI. Multivariable regression analyses were performed.
  
  
  RESULTS
  Relative to children from mothers with the highest educational level, mean BMI standard deviation scores was lower at age 24 months in children from mothers with the low, mid-low, and mid-high educational level, and in the mid-low group at 36 months (P < .001). Prevalence of overweight was lower in children from mothers with the mid-low educational level at age 24 and 36 months (adjusted odds ratio at 24 months: 0.61; 95% confidence interval: 0.43-0.87 and at 36 months: 0.65; 95% confidence interval: 0.44-0.96) but was not significantly different for the other educational levels. There were no significant differences in childhood overweight by income level.
  
  
  CONCLUSIONS
  The inverse association between socioeconomic status and childhood overweight presumably emerges after age 3 years. Before this age, the gradient may be the reverse.
authors.affiliation: Generation R Study Group, Erasmus MC-University Medical Centre Rotterdam, Rotterdam, The Netherlands. l.vanrossem@erasmusmc.nl
authors.forename: Lenie
authors.initials: L
authors.lastname: van Rossem
authors.forename: Lindsay M
authors.initials: LM
authors.lastname: Silva
authors.forename: Anita
authors.initials: A
authors.lastname: Hokken-Koelega
authors.forename: Lidia R
authors.initials: LR
authors.lastname: Arends
authors.forename: Henriëtte A
authors.initials: HA
authors.lastname: Moll
authors.forename: Vincent W V
authors.initials: VW
authors.lastname: Jaddoe
authors.forename: Albert
authors.initials: A
authors.lastname: Hofman
authors.forename: Johan P
authors.initials: JP
authors.lastname: Mackenbach
authors.forename: Hein
authors.initials: H
authors.lastname: Raat
mesh_terms: D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D050177:Overweight / Q000453:epidemiology*; D011446:Prospective Studies; D012959:Socioeconomic Factors