Skip to main content

Table 2 Prevalence of single and multiple behavioral risk factors, by sex, at each time point, National Longitudinal Survey of Children and Youth, 2000-2005

From: Individual and social determinants of multiple chronic disease behavioral risk factors among youth

   Time 1a Time 2a Time 3a  
   (n = 1135) (n = 1135) (n = 1135) p
   %b 95% CIc %b 95% CIc %b 95% CIc for trendd
Risk factors         
   Physical inactivitye Male 43 36, 49 44 37, 50 61 55, 67 <.001
  Female 57 50, 64 59 52, 65 72 65, 78 .002
   Sedentary behaviorf Male 49 42, 55 43 37, 50 50 44, 56 .78
  Female 36 30, 42 36 30, 43 36 29, 42 .99
Ever smokingg Male 6 3, 11 12 9, 17 31 26, 38 <.001
  Female 6 3, 10 15 11, 20 29 24, 36 <.001
Ever drinkingh Male 7 4, 11 16 12, 22 48 41, 54 <.001
  Female 5 3, 9 14 10, 18 48 41, 55 <.001
   High body mass indexi Male 24 19, 30 23 17, 30 18 13, 23 .07
  Female 22 17, 29 15 11, 19 14 10, 18 .05
No. of Risk factors         
   0 Male 31 25, 37 21 17, 26 6 4, 11 <.001
  Female 26 21, 32 22 17, 28 10 6, 16 <.001
   1 Male 38 32, 44 40 34, 47 27 22, 32 .003
  Female 44 37, 50 39 33, 47 31 24, 38 .01
   2 Male 24 19, 30 27 22, 33 37 31, 43 .002
  Female 24 19, 29 25 18, 32 27 21, 34 .42
   3-5 Male 7 5, 11 12 8, 16 30 25, 36 <.001
  Female 6 4, 11 14 10, 19 32 27, 38 <.001
  1. CI = confidence interval.
  2. a Time 1 refers to Cycle 4 (2000-2001), Time 2 refers to Cycle 5 (2002-2003) and Time 3 refers to Cycle 6 (2004-2005) of the National
  3. Longitudinal Survey of Children and Youth.
  4. b Weighted percentage expressed in terms of the proportion of Canadian children aged 10-11 years in Cycle 4 and followed biennially
  5. until Cycle 6 of the National Longitudinal Survey of Children and Youth.
  6. c CIs were computed using bootstrap weights to account for the complex sampling design of the National Longitudinal Survey of Children
  7. and Youth.
  8. d p value for linear trend in the percentages of single and multiple behavioral risk factors over time obtained from the polynomial trend test.
  9. e Engaging in organized/unorganized physical activities fewer than 4 times per week.
  10. f Watching television or videos for more than 2 hours per day.
  11. g Ever smoking a cigarette, even a few puffs.
  12. h Ever having a standard drink of alcohol.
  13. i Being overweight/obese, as defined by cutoff points of Cole and colleagues [54].