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Table 2 Participant characteristics (mean (SD), unless otherwise noted)

From: Correlates of objectively measured sedentary time and self-reported screen time in Canadian children

  Total ( n= 567) Boys ( n= 239) Girls ( n= 328)
Child characteristics    
Age (years) 10.0 (0.4) 10.1 (0.4) 10.0 (0.4)
Height (cm) 143.8 (7.2) 143.6 (6.8) 143.9 (7.4)
Weight (kg) 38.1 (9.0) 38.3 (9.1) 37.9 (9.1)
Percent body fat 20.5 (7.4) 18.7 (7.2) 21.9 (7.3)*
Waist circumference (cm) 63.0 (8.4) 64.1 (8.8) 62.2 (8.0)**
BMI z-score 0.20 (1.02) 0.32 (0.98) 0.11 (1.04)***
Weight status (n,%)    
  Underweight 15 (2.7%) 2 (0.8%) 13 (4.0%)
  Normal weight 422 (74.7%) 177 (74.4%) 245 (74.9%)
  Overweight 68 (12.0%) 29 (12.2%) 39 (11.9%)
  Obese 60 (10.6%) 30 (12.6%) 30 (9.2%)
Ethnicity (n,%)    
  White/Caucasian 373 (66.6%) 160 (68.1%) 213 (65.6%)
African American 15 (2.7%) 4 (1.7%) 11 (3.4%)
Asian 57 (10.2%) 25 (10.6%) 32 (9.9%)
First Nations 2 (0.4%) 1 (0.4%) 1 (0.3%)
East Indian 5 (0.9%) 1 (0.4%) 4 (1.2%)
Do not know/other 108 (19.3%) 11 (18.7%) 64 (19.6%)
Physical activity (min/day)    
  MVPA 58.7 (19.3) 67.1 (19.3) 52.7 (17.0)*
  Moderate 41.8 (12.1) 47.6 (11.7) 37.8 (10.7)*
  Light PA 304.8 (45.0) 310.1 (43.7) 301.1 (45.5)****
Total SED (min/day) 511.4 (63.1) 506.9 (66.0) 514.5 (60.9)
Self-reported screen time score (hour/day)    
  Total screen time 2.8 (1.8) 2.9 (1.6) 2.7 (1.9)
  TV 1.5 (1.3) 1.5 (1.1) 1.6 (1.2)
  Video game/computer 1.3 (1.0) 1.4 (1.0)* 1.1 (1.0)
Household income (n,%)    
  Less than $14,000 16 (3.0) 5 (2.2) 11 (3.5)
$15,000--59,999 89 (16.4) 33 (14.4) 56 (17.7)
$60,000-139,999 231 (42.4) 100 (43.7) 131 (39.4)
$140,000 and above 209 (38.4) 91 (39.7) 118 (37.3)
Parental characteristics
Mother
Education    
  High school or less 85 (15.3) 35 (15.1) 50 (15.4)
  Greater than high school 473 (84.7) 198 (85.0) 275 (84.6)
Self-reported BMI (kg/m2) 24.9 (5.2) 25.3 (5.6) 24.6 (4.9)
Age (years) 41.7 (5.1) 41.5 (4.9) 41.9 (5.2)
Father
Education    
  High school or less 102 (18.7) 40 (17.7) 56 (19.3)
  Greater than high school 444 (81.3) 185 (82.3) 259 (80.7)
Self-reported BMI (kg/m2) 26.8 (4.4) 26.7 (4.4) 26.8 (4.4)
Age (years) 44.1 (6.0) 44.4 (6.2) 43.8 (5.8)
  1. BMI: body mass index; MVPA: moderate- to-vigorous-intensity physical activity; PA: physical activity; SED: accelerometer measured total daily sedentary time.
  2. Unpaired t-test * p < 0.0001, ** p = 0.0069, ***p = 0.0175, ****p = 0.0245.