Table 3.
Final Growth Curve Models Examining Changes in Girls’ MVPA and TPA in Different Time-periods across Grades 5 to 7, Coefficients (SE), N = 356
| School MVPA | Afterschool MVPA | Evening MVPA | School TPA | Afterschool TPA | Evening TPA | |
|---|---|---|---|---|---|---|
| Intercept | 1.82 (0.12)*** | 2.49 (0.15)*** | 2.80 (0.16)*** | 23.69 (0.41)*** | 30.91 (0.48)*** | 27.95 (0.50)*** |
| Time | −0.75 (0.11)*** | 0.25 (0.10)** | −0.50 (0.78)*** | −7.45 (0.51)*** | −2.33 (0.27)*** | −2.93 (0.22)*** |
| Time*time | 0.29 (0.05)*** | 2.08 (0.23)*** | ||||
|
| ||||||
| Variance components (random effects: slope) | ||||||
|
| ||||||
| Within-children | 0.09 (0.004)*** | 3.43 (0.26)*** | 3.59 (0.21)*** | 13.65 (1.02)*** | 23.94 (1.85)*** | 24.02 (2.07)*** |
| Between-children | 0.01 (0.03) | 1.34 (0.27)*** | 0 | 0.45 (0.78) | 8.46 (1.88)*** | 2.20 (1.66) |
| Between-schools | 0.06 (0.02)** | 0.02 (0.06) | 0.002 (0.01) | 0.47 (0.28)** | 0.36 (0.39) | 0.02 (0.17) |
| Goodness-of-fit | ||||||
| Deviance | 2900.6 | 5055.9 | 3771.5 | 6826.0 | 7420.7 | 5678.2 |
| AIC | 2926.6 | 5079.9 | 3793.5 | 6852.0 | 7442.7 | 5700.5 |
| BIC | 2926.9 | 5091.9 | 3804.5 | 6864.9 | 7453.6 | 5711.1 |
Note.
MVPA=moderate-to-vigorous physical activity; TPA=total physical activity
All models adjusted for race and parent education as fixed effects.
**
p < .05,
***
p < .0001