Table 5.
Mixed Model Estimatesa (95% CI) of Sedentary Time (Minutes/Day), Measured by Actical Physical Activity Monitors, by Baseline Overweight
| Overweight BMI > 85th percentile (n = 22) | Normal weight BMI ≤ 85th percentile (n = 109) | Difference | P-value | |
|---|---|---|---|---|
| Weekly average | ||||
| Baseline | 468.72 (442.28, 495.15) | 439.99 (426.78, 453.20) | −28.72 (−56.83, −0.61) | 0.045 |
| Week 6 | 493.82 (466.41, 521.23) | 450.07 (436.21, 463.92) | −43.75 (−73.10, −14.40) | 0.004 |
| Week 12 | 494.57 (467.23, 521.92) | 451.43 (437.18, 465.67) | −43.14 (−72.63, −13.66) | 0.005 |
| Change from baseline | ||||
| Week 6 | 25.10 (−1.01, 51.21) P = .059 |
10.07 (−1.97, 22.12) P = .101 |
−15.03 (−43.59, 13.54) | 0.296 |
| Week 12 | 25.86 (−0.96, 52.67) P = .058 |
11.43 (−0.43, 23.30) P = .059 |
−14.42 (−43.53, 14.69) | 0.324 |
| Adjustedb change from baseline | ||||
| Week 6 | 17.85 (−8.29, 43.98) P = .180 |
−0.28 (−14.26, 13.70) P = .969 |
−18.13 (−45.57, 9.32) | 0.194 |
| Week 12 | 7.21 (−22.88, 37.30) P = .638 |
−5.91 (−25.85, 14.04) P = .560 |
−13.12 (−40.55, 14.32) | 0.347 |
a
Random family effect included to account for multiple children per family. Kronecker (UN@CS) covariance structure used for repeated measures within an individual (3 time points × up to 6 daily measurements per time point). Satterthwaite correction for denominator degrees of freedom.
b
Adjusted for calendar month, age, and sex.