Table 3 Change in sedentary time over time by BMI category: difference from healthy weight

From: Association of BMI category with change in children’s physical activity between ages 6 and 11 years: a longitudinal study

  Weekday Weekend
  Est 95% CI p-value Est 95% CI p-value
Model estimates n = 1742    n = 1624   
Mean sed time at age 6 (min/day)
BMI category
 Healthy 0 Reference   0 Reference  
 Overweight −7.90 (−15.57, −0.22)   −3.28 (−13.88, 7.31)  
 Obese −11.41 (−21.00, −1.82) 0.014 −4.06 (−17.79, 9.68) 0.728
Change in sed time (min/day/year)
BMI category
 Healthy 0 Reference   0 Reference  
 Overweight 2.90 (0.80, 5.01)   1.91 (−1.04, 4.86)  
 Obese 3.05 (0.65, 5.45) 0.002 1.50 (−2.01, 5.01) 0.352
Comparisons with similar child of health weighta
Overweight
 Age 6 −7.90 (−15.57, −0.22)   −3.28 (−13.88, 7.31)  
 Age 9 0.81 (−3.98, 5.61)   2.44 (−4.16, 9.04)  
 Age 11 6.61 (0.02, 13.21)   6.26 (−2.96, 15.47)  
Obese
 Age 6 −11.41 (−21.00, −1.82)   −4.06 (−17.79, 9.68)  
 Age 9 −2.26 (−7.79, 3.27)   0.44 (−7.23, 8.11)  
 Age 11 3.84 (−3.03, 10.72)   3.44 (−6.33, 13.20)  
  1. p-values: Test for differences between BMI categories
  2. Model adjusted for seasonality, wear time, gender, household education and age-interactions with gender and household education
  3. aThe difference in average sedentary time between a child of healthy weight at baseline who remains so, and a child who is overweight/obese at baseline and remains so, at each age