Table 2.
Fixed Effects | B | SE | t | p-value | Variance-Covariance Components Test | ||
---|---|---|---|---|---|---|---|
| |||||||
Deviance | χ2 statistic | p-value | |||||
|
|||||||
Effects of Time | |||||||
| |||||||
Intercept | 11.989 | 0.531 | 22.600 | <0.001 | |||
Age | -0.806 | 0.656 | -1.228 | 0.221 | 7131.308 | 1696.718 | <0.001 |
| |||||||
Linear Effect of Time | 0.825 | 0.373 | 2.210 | 0.027 | |||
Age | 1.616 | 0.455 | 3.548 | <0.001 | 6904.369 | 226.939 | <0.001 |
| |||||||
Quadratic Effect of Time | 0.017 | 0.057 | 0.300 | 0.764 | |||
Age | -0.263 | 0.067 | -3.918 | <0.001 | 6869.128 | 35.242 | <0.001 |
| |||||||
Effects of Gender | |||||||
| |||||||
Intercept | 11.871 | 0.355 | 34.051 | <0.001 | |||
Age | 0.891 | 0.426 | 2.091 | 0.037 | |||
Gender | 1.190 | 0.702 | 1.694 | 0.091 | 7130.786 | 1689.568 | <0.001 |
| |||||||
Linear Effect of Time | 0.928 | 0.099 | 9.329 | <0.001 | |||
Age | 0.071 | 0.122 | 0.582 | 0.561 | |||
Gender | -0.177 | 0.197 | -0.895 | 0.371 | 6902.158 | 228.628 | <0.001 |
| |||||||
Effects of Race | |||||||
| |||||||
Intercept | 11.882 | 0.346 | 34.384 | <0.001 | |||
Age | 0.946 | 0.419 | 2.260 | 0.025 | |||
Contrast 1 | -0.429 | 1.049 | -0.409 | 0.683 | |||
Contrast 2 | -1.392 | 1.114 | -1.249 | 0.213 | 7125.602 | 1663.536 | <0.001 |
| |||||||
Linear Effect of Time | 0.922 | 0.100 | 9.450 | <0.001 | |||
Age | 0.062 | 0.117 | 0.526 | 0.599 | |||
Contrast 1 | 0.047 | 0.260 | 0.182 | 0.856 | |||
Contrast 2 | 0.788 | 0.300 | 2.622 | 0.009 | 6889.902 | 235.700 | <0.001 |
Note. Race Contrast 1 compared differences between White and Black adolescents. Race Contrast 2 compared Black adolescents to adolescents who belonged to the “Other” racial group.