title: Modifiable lifestyle behavior patterns, sedentary time and physical activity contexts: a cluster analysis among middle school boys and girls in the SALTA study.
abstract: OBJECTIVE
  To analyze how modifiable health-related variables are clustered and associated with children's participation in play, active travel and structured exercise and sport among boys and girls.
  
  
  METHODS
  Data were collected from 9 middle-schools in Porto (Portugal) area. A total of 636 children in the 6th grade (340 girls and 296 boys) with a mean age of 11.64 years old participated in the study. Cluster analyses were used to identify patterns of lifestyle and healthy/unhealthy behaviors. Multinomial logistic regression analysis was used to estimate associations between cluster allocation, sedentary time and participation in three different physical activity (PA) contexts: play, active travel, and structured exercise/sport.
  
  
  RESULTS
  Four distinct clusters were identified based on four lifestyle risk factors. The most disadvantaged cluster was characterized by high body mass index, low high-density lipoprotein cholesterol and cardiorespiratory fitness and a moderate level of moderate to vigorous PA. Everyday outdoor play (OR=1.85, 95%CI 0.318-0.915) and structured exercise/sport (OR=1.85, 95%CI 0.291-0.990) were associated with healthier lifestyle patterns. There were no significant associations between health patterns and sedentary time or travel mode.
  
  
  CONCLUSIONS
  Outdoor play and sport/exercise participation seem more important than active travel from school in influencing children's healthy cluster profiles.
authors.affiliation: Research Centre in Physical Activity, Health and Leisure (CIAFEL), Faculty of Sport Science, University of Porto, Porto, Portugal. emarques@fade.up.pt
authors.forename: Elisa A
authors.initials: EA
authors.lastname: Marques
authors.forename: Andreia N
authors.initials: AN
authors.lastname: Pizarro
authors.forename: Pedro
authors.initials: P
authors.lastname: Figueiredo
authors.forename: Jorge
authors.initials: J
authors.lastname: Mota
authors.forename: Maria P
authors.initials: MP
authors.lastname: Santos
mesh_terms: D015992:Body Mass Index; D002648:Child; D008076:Cholesterol, HDL / Q000097:blood; D016000:Cluster Analysis; D005080:Exercise Test; D005260:Female; D015438:Health Behavior; D006801:Humans; D008297:Male; D009043:Motor Activity; D010809:Physical Fitness; D011174:Portugal; D011998:Recreation; D018570:Risk Assessment; D012307:Risk Factors; D057185:Sedentary Behavior; D013334:Students / Q000706:statistics & numerical data*; D014195:Travel
chemical_list: D008076:Cholesterol, HDL