Table 3 Results of hierarchical regression analyses explaining moderate-to-vigorous physical activity in boys (n = 149)
| Model 1 | Model 2 | Model 3 | Full Model | |
|---|---|---|---|---|
| Blocks of variables | Standardized Beta | |||
| Demographic | ||||
| 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 | ||||
| Self-efficacy | 0.30*** | 0.20** | 0.15* | |
| Social | ||||
| Parent Support | 0.02 | -0.05 | ||
| Peer Support | 0.19** | 0.19** | ||
| Environmental | ||||
| Home PA equipment1 | 0.18** | |||
| Temperature | 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 |