title: Prevalence and determinants of physical activity and lifestyle in relation to obesity among schoolchildren in Israel.
abstract: OBJECTIVE
  To describe the relationships between physical activity, lifestyle determinants and obesity in adolescent Israeli schoolchildren.Design and settingCross-sectional survey.
  
  
  METHODS
  The MABAT Youth Survey was a nationally representative, school-based study of youth in grades 7 to 12 (ages 11-19 years).
  
  
  METHODS
  Self-administered questionnaires assessed health behaviours and anthropometric indices were measured. Logistic regression analysis was used to examine the associations between obesity, physical activity, socio-economic status and other lifestyle habits. One-way ANOVA was used to determine mean physical activity levels (MET values) by BMI categories.
  
  
  RESULTS
  The prevalence of overweight was 13-15 % and of obesity 4-9 % depending on gender and ethnicity, and was higher among the non-Jewish sectors. Thirty-six per cent and 57 % of Jewish girls and boys, and 40 % and 58 % of non-Jewish girls and boys, respectively, were optimally active. Boys from low socio-economic schools and those who slept for less than 6 h at night were less active. Girls from middle school were found to be 53 % more optimally physically active among Jews, and 89 % more among non-Jews, compared with girls from high school (P = 0.001); girls with less educated parents were also less physically active. No clear relationship was found between the level of obesity and physical activity.
  
  
  CONCLUSIONS
  Physical inactivity was strongly related to gender, age, social status, sleeping habits, hookah smoking, and parental educational status. Education and intervention programmes should focus on these risk factors.
authors.affiliation: Department of Epidemiology and Preventive Medicine, Sackler Faculty of Medicine, Tel-Aviv University, Tel Aviv, Israel.
authors.forename: Dorit
authors.initials: D
authors.lastname: Nitzan Kaluski
authors.forename: Getachew
authors.initials: G
authors.lastname: Demem Mazengia
authors.forename: Tal
authors.initials: T
authors.lastname: Shimony
authors.forename: Rebecca
authors.initials: R
authors.lastname: Goldsmith
authors.forename: Elliot M
authors.initials: EM
authors.lastname: Berry
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D000886:Anthropometry; D018912:Arabs; D015992:Body Mass Index; D002648:Child; D003430:Cross-Sectional Studies; D004522:Educational Status; D015444:Exercise / Q000502:physiology*; D005260:Female; D015438:Health Behavior; D006801:Humans; D007557:Israel / Q000453:epidemiology; D007585:Jews; D008019:Life Style; D016015:Logistic Models; D008297:Male; D009765:Obesity / Q000453:epidemiology* / Q000208:ethnology / Q000209:etiology; D016017:Odds Ratio; D050177:Overweight / Q000453:epidemiology* / Q000208:ethnology / Q000209:etiology; D015995:Prevalence; D012307:Risk Factors; D012890:Sleep / Q000502:physiology; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D055815:Young Adult