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Table 1 Characteristics of Canadian children and adolescents in the Canadian Health measures Survey, 2007–2009

From: Increasing blood pressure and its associated factors in Canadian children and adolescents from the Canadian Health Measures Survey

  Age, years
  6 to 11 (n = 1058) 12 to 17 (n = 792)
  n Mean or % 95 % CI n Mean or % 95 % CI
Boys, n (%) 531 50.5 49.7, 51.4 416 54.2 51.9, 56.5
Mean systolic blood pressure (mmHg) 1058 93.2 92.4, 93.9 792 98.7 97.0, 100.3
Mean diastolic blood pressure (mmHg) 1058 60.5 59.7, 61.4 792 62.5 61.2, 63.9
Mean systolic blood pressure z-scores 1058 −0.70 −0.75,-0.65 792 −1.20 −1.38, -1.08
Mean diastolic blood pressure z-scores 1058 0.07 0.01, 0.13 792 −0.22e −0.34, -0.10
Mean heart rate (bpm) 1058 75 74, 77 792 80 78, 81
Mean body mass index (kg/m2) 1058 17.8 17.6, 18.0 792 22.0 21.1, 23.0
Mean body mass index z-scores (BMIZ) 1058 0.51 0.41, 0.61 792 0.47e 0.22, 0.73
Body mass index category, n (%)
Normal weight (BMIZ < 84 percentile) 733 67 63.2, 70.7 558 69.2 61.1, 77.3
Overweight (84 ≤ BMIZ < 97.7 percentile) 195 20.2 14.9, 25.4 143 15.8 11.6, 19.9
Obese (BMIZ ≥ 97.7 percentile) 131 12.9 9.9, 15.8 91 15.1e 8.6, 21.6
Physically active, n (%) 888 83.6 80.5, 86.6 424 55.2 49.3, 61.2
Family history of hypertension, n (%) 161 13.9 11.2, 16.5 173 20.5 16.8, 24.2
Low family income, n (%) 74 6.9e 3.6, 10.2 43 7.0e 3.2, 10.8
Post-secondary educated parents, n (%) 856 79.9 74.2, 85.6 605 73.1 65.5, 80.8
Ethnicity - whites, n (%) 814 75.4 62.0, 88.7 635 75.6 65.6, 85.6
Daily smoking, n (%) 53 6.9e 2.1, 11.7
  1. Mean and proportion (%) were estimated using bootstrap method; CI, confidence interval.
  2. e, CV coefficient of variation of 16.6 % − 33.3 %, interpret with caution.