title: Positive influences of home food environment on primary-school children's diet and weight status: a structural equation model approach.
abstract: The mechanism by which the home food environment (HFE) influences childhood obesity is unclear. The present study aimed to investigate the relationship between HFE and childhood obesity as mediated by diet in primary-school children.
  
  
  
  Cross-sectional data collected from parents and primary-school children participating in the Obesity Prevention and Lifestyle Evaluation Project. Only children aged 9-11 years participated in the study. Matched parent/child data (n 3323) were analysed. Exploratory factor analysis underlined components of twenty-one HFE items; these were linked to child diet (meeting guidelines for fruit, vegetable and non-core food intakes) and measured child BMI, in structural equation modelling, adjusting for confounders.
  
  
  
  Twenty geographically bounded metropolitan and regional South Australian communities.
  
  
  
  School children and their parents from primary schools in selected communities.
  
  
  
  In the initial exploratory factor analysis, nineteen items remaining extracted eight factors with eigenvalues >1·0 (72·4 % of total variance). A five-factor structure incorporating ten items described HFE. After adjusting for age, gender, socio-economic status and physical activity all associations in the model were significant (P<0·05), explaining 9·3 % and 4·5 % of the variance in child diet and BMI, respectively. A more positive HFE was directly and indirectly associated with a lower BMI in children through child diet.
  
  
  
  The robust statistical methodology used in the present study provides support for a model of direct and indirect dynamics between the HFE and childhood obesity. The model can be tested in future longitudinal and intervention studies to identify the most effective components of the HFE to target in childhood obesity prevention efforts.
authors.affiliation: 1Department of Nutrition and Dietetics,School of Health Sciences, Faculty of Medicine,Nursing and Health Sciences,Flinders University,GPO Box 2100,Adelaide,SA 5001,Australia.
authors.forename: Jia Xin
authors.initials: JX
authors.lastname: Ong
authors.affiliation: 2Flinders Centre for Epidemiology and Biostatistics,School of Medicine,Flinders University,Bedford Park,SA,Australia.
authors.forename: Shahid
authors.initials: S
authors.lastname: Ullah
authors.affiliation: 1Department of Nutrition and Dietetics,School of Health Sciences, Faculty of Medicine,Nursing and Health Sciences,Flinders University,GPO Box 2100,Adelaide,SA 5001,Australia.
authors.forename: Anthea
authors.initials: A
authors.lastname: Magarey
authors.affiliation: 1Department of Nutrition and Dietetics,School of Health Sciences, Faculty of Medicine,Nursing and Health Sciences,Flinders University,GPO Box 2100,Adelaide,SA 5001,Australia.
authors.forename: Eva
authors.initials: E
authors.lastname: Leslie
mesh_terms: D001315:Australia; D001835:Body Weight; D002648:Child; D003430:Cross-Sectional Studies; D003627:Data Interpretation, Statistical; D004032:Diet; D004777:Environment; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D018673:Nutrition Policy; D012574:Schools
keywords: Childhood obesity; Exploratory factor analysis; Home food environment; Structural equation modelling