Table 6.
Mixed Model Estimatesa (95% CI) of MVPA (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 | 54.01 (43.80, 64.21) | 77.47 (71.94, 83.01) | 23.47 (12.60, 34.33) | <0.001 |
| Week 6 | 46.55 (36.05, 57.06) | 71.18 (65.76, 76.59) | 24.62 (13.52, 35.73) | <0.001 |
| Week 12 | 41.75 (31.71, 51.80) | 74.50 (68.79, 80.21) | 32.75 (21.92, 43.58) | <0.001 |
| Change from baseline | ||||
| Week 6 | −7.45 (−17.69, 2.78) P = .147 |
−6.30 (−11.19, −1.40) P = .012 |
1.16 (−10.09, 12.40) | 0.837 |
| Week 12 | −12.25 (−21.27, −3.24) P = .010 |
−2.97 (−7.79, 1.85) P = .225 |
9.28 (−0.83, 19.40) | 0.071 |
| Adjustedb change from baseline | ||||
| Week 6 | −2.45 (−12.43, 7.53) P = .629 |
−2.16 (−7.59, 3.28) P = .436 |
0.29 (−10.13, 10.71) | 0.956 |
| Week 12 | −4.00 (−15.51, 7.51) P = .495 |
3.68 (−4.15, 11.51) P = .356 |
7.67 (−2.56, 17.91) | 0.141 |
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.