| Model 1 | Model 2 | Model 3 | Full Model |
---|---|---|---|---|
Blocks of variables | Standardized Beta | |||
Demographic | Â | Â | Â | Â |
Age, years | -0.15 | -0.16 | -0.14 | -0.12 |
Race/ethnicity | 0.06 | 0.03 | 0.04 | 0.03 |
Parent education | 0.05 | 0.08 | 0.07 | 0.04 |
Reduced price lunch | 0.08 | 0.03 | 0.03 | 0.07 |
BMI z-score | -0.02 | -0.02 | -0.03 | 0.01 |
Physical maturation | -0.10 | -0.09 | -0.13 | -0.13 |
Individual | Â | Â | Â | Â |
Self-efficacy | Â | 0.30*** | 0.20** | 0.15* |
Social | Â | Â | Â | Â |
Parent Support | Â | Â | 0.02 | -0.05 |
Peer Support | Â | Â | 0.19** | 0.19** |
Environmental | Â | Â | Â | Â |
Home PA equipment1 | Â | Â | Â | 0.18** |
Temperature | Â | Â | Â | 0.21** |
R 2 | 0.07 | 0.15 | 0.19 | 0.25 |
Adj R2 | 0.03 | 0.11 | 0.13 | 0.19 |
Δ Adj R2 |  | 0.08 | 0.02 | 0.06 |
Model significance | F (6, 140) = 1.71 P = 0.12 | F (7, 139) = 3.57 P < 0.001 | F (9, 137) = 3.47 P < 0.001 | F (11, 135) = 4.05 P < 0.0001 |