Table 2 Change in MVPA 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 MVPA at age 6 (min/day)
BMI category
 Healthy 0 Reference   0 Reference  
 Overweight 0.99 (−2.41, 4.38)   −0.95 (−6.25, 4.35)  
 Obese −0.03 (−4.26, 4.21) 0.846 −6.82 (−13.66, 0.03) 0.147
Change in MVPA (min/day/year)
BMI category
 Healthy 0 Reference   0 Reference  
 Overweight −1.71 (−2.65, −0.78)   −1.31 (−2.79, 0.17)  
 Obese −1.99 (−3.05, −0.92)  < 0.0005 −0.65 (−2.42, 1.12) 0.195
Comparisons with similar child of health weighta
Overweight
 Age 6 0.99 (−2.41, 4.38)   −0.95 (−6.25, 4.35)  
 Age 9 −4.15 (−6.26, −2.03)   −4.88 (−8.17, −1.60)  
 Age 11 −7.58 (−10.49, −4.66)   −7.51 (−12.12, −2.89)  
Obese
 Age 6 −0.03 (−4.26, 4.21)   −6.82 (−13.66, 0.03)  
 Age 9 −5.98 (−8.40, −3.56)   −8.77 (−12.53, −5.00)  
 Age 11 −9.96 (−12.98, −6.93)   −10.06 (−14.92, −5.21)  
  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 MVPA 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