title: Association between Obesity and Parental Weight Status in Children and Adolescents.
abstract: OBJECTIVE
  This study aims to assess the relationship between body mass index (BMI) of children and that of their parents in a nationally-representative sample of Iranian population.
  
  
  METHODS
  This cross-sectional nationwide study was conducted in 2011-2012 among 6-18-year-old students and their parents living in 30 provinces of Iran. Socio-demographic information was collected. The BMI values of the children/adolescents were categorized according to the World Health Organization reference curves. Association between parental and student weight status was examined using ordinal regression models after adjustment for potential confounders.
  
  
  RESULTS
  Overall, 23043 children and adolescents and one of their parents participated in this study (50.7% boys, 73.4% urban status). Mean age of the subjects was 12.55±3.31 years. Mean BMI values of parents and children/adolescents were 27.0±4.57 and 18.8±4.4 kg/m2, respectively. After adjusting for confounders, overweight and/or obesity in students of both genders was found to be significantly associated with parental overweight and/or obesity. In those students who had obese parents, the odds ratio (OR) of being obese was 2.79 for boys [OR=2.79; 95% confidence interval (CI)=2.44-3.20] and 3.46 for girls (OR=3.46; 95% CI=3.03-3.94) compared to their peers with normal-weight parents. Boys with overweight parents were 1.7 times more overweight than their counterparts with normal-weight parents (OR=1.70; 95% CI=1.15-1.92). Similarly, girls who had overweight parents were more overweight compared to those with normal-weight parents (OR=2.00; 95% CI=1.77-2.25).
  
  
  CONCLUSIONS
  Our findings highlight the importance of the shared family environment as a multi-factorial contributor to the childhood obesity epidemic and the necessity of implementing family-centered preventive programs.
authors.forename: Maryam
authors.initials: M
authors.lastname: Bahreynian
authors.affiliation: Non-Communicable Diseases Research Center, Alborz University of Medical Sciences, Karaj, Iran, E-mail: mqorbani1379@yahoo.com.
authors.forename: Mostafa
authors.initials: M
authors.lastname: Qorbani
authors.forename: Bita Moradi
authors.initials: BM
authors.lastname: Khaniabadi
authors.forename: Mohammad Esmaeil
authors.initials: ME
authors.lastname: Motlagh
authors.forename: Omid
authors.initials: O
authors.lastname: Safari
authors.forename: Hamid
authors.initials: H
authors.lastname: Asayesh
authors.forename: Roya
authors.initials: R
authors.lastname: Kelishadi
mesh_terms: D000293:Adolescent; D015992:Body Mass Index; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007492:Iran / Q000453:epidemiology; D008297:Male; D016017:Odds Ratio; D050177:Overweight / Q000453:epidemiology; D010290:Parents; D063766:Pediatric Obesity / Q000453:epidemiology*; D015995:Prevalence; D012307:Risk Factors
keywords: Overweight; body mass index; children and adolescents parents.; obesity