title: Factors associated with food choices among Greek primary school students: a cluster analysis in the ELPYDES study.
abstract: BACKGROUND
  Food choice in Greece follows a westernized model. We tried to identify the characteristics of clusters regarding food choice and behaviour in a large sample of Greek primary school students, in order to acknowledge some mediating parameters that need to be addressed when planning interventions to promote healthy nutrition.
  
  
  METHODS
  Cross-sectional study in 2439 fifth and sixth grade students from the Attica and Thessaloniki regions. Three self-administered questionnaires were distributed assessing food consumption, nutrition knowledge and factors associated with dietary change. Data were analysed using principal components analysis (PCA) and K-means cluster analysis.
  
  
  RESULTS
  A total of 28.4% (n = 592) of the students were identified as demonstrating 'unbalanced nutrition' whereas 44.8% (n = 1018) and 22.8% (n = 319) demonstrated 'balanced' and 'low food intake', respectively. With regards to nutrition knowledge, the clusters were as follows: medium (n = 319, 14.5%), good (n = 1788, 80.9%) and bad knowledge (n = 101, 4.57%) cluster. After analysing the results of PCA, three clusters were formed: A 'negative effect' (n = 561, 28.8%), a 'health oriented' (n = 777, 39.9%) and a 'reinforced' to eat fruits and vegetables (n = 506, 31.3%) group.
  
  
  CONCLUSIONS
  The present study managed to identify clusters that correspond to food intake, nutrition knowledge and other factors associated with dietary behaviour and to describe their characteristics.
authors.affiliation: Department of Nutrition, Dietetics, Harokopio University, Kallithea, Athens, Greece.
authors.forename: Grigoris
authors.initials: G
authors.lastname: Risvas
authors.forename: Demosthenes B
authors.initials: DB
authors.lastname: Panagiotakos
authors.forename: Stavroula
authors.initials: S
authors.lastname: Chrysanthopoulou
authors.forename: Konstantina
authors.initials: K
authors.lastname: Karasouli
authors.forename: Antonia-Leda
authors.initials: AL
authors.lastname: Matalas
authors.forename: Antonis
authors.initials: A
authors.lastname: Zampelas
mesh_terms: D002648:Child; D002755:Choice Behavior; D016000:Cluster Analysis; D003430:Cross-Sectional Studies; D005247:Feeding Behavior; D005260:Female; D006115:Greece; D006293:Health Promotion; D006801:Humans; D008297:Male; D012574:Schools; D013334:Students