title: An examination of the co-occurrence of modifiable risk factors associated with chronic disease among youth in the COMPASS study.
abstract: OBJECTIVE
  To examine the prevalence of major modifiable risk factors for cancer, examine risk factor co-occurrence, and examine how demographic and social factors are associated with risk factor co-occurrence among youth in the COMPASS study.
  
  
  METHODS
  Data from 23,280 grade 9-12 students in Year 1 (2012-2013) of the COMPASS study were used to examine the prevalence of seven different modifiable risk factors and the co-occurrence of these risk factors by gender and by grade. The between-school variance in the number of risk factors was calculated, and a model was developed to examine how demographic and social factors were associated with the number of co-occurring risk factors.
  
  
  RESULTS
  Among youth in this sample, 5.5% were current smokers, 22.9% were current binge drinkers, 16.5% were current marijuana users, 20.0% were overweight/obese, 53.1% were physically inactive, 96.7% were highly sedentary, and 95.1% had inadequate fruit and vegetable consumption. The mean number of co-occurring risk factors among students was 3.2 (± 1.1) and only 0.2% (n = 42) reported having none of the risk factors and 0.4% (n = 67) reported having all seven risk factors. Significant between-school random variation in the number of co-occurring risk factors was not identified. The number of risk factors was associated with most of the correlates examined although the effect sizes were generally small.
  
  
  CONCLUSIONS
  This research identifies that risk factor co-occurrence is common, most of student characteristics examined are only modestly associated with the likelihood of co-occurrence and that the school environment is not associated with variability in the number of co-occurring risk factors.
authors: School of Public Health and Health Systems, University of Waterloo, 200 University Avenue, Waterloo, ON, N2L 3G1, Canada, sleather@uwaterloo.ca.
authors: Scott T
authors: ST
authors: Leatherdale
mesh_terms: D000293:Adolescent; D000428:Alcohol Drinking / Q000453:epidemiology*; D002908:Chronic Disease; D005260:Female; D006801:Humans; D008297:Male; D008385:Marijuana Smoking / Q000453:epidemiology*; D009765:Obesity / Q000453:epidemiology*; D050177:Overweight / Q000453:epidemiology; D015995:Prevalence; D012307:Risk Factors; D012574:Schools; D013334:Students / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires