Table 3.

Model summary of hierarchical regression analysis predicting ADHD symptoms.

	Model 1			Model 2
Variable	B	SE B	β	B	SE B	β
(Constant)	72.36	5.74		74.20	5.52
Age at diagnosis	−0.90	0.92	−.14	−1.29	0.89	−.20
Age symptoms were first noticed	−2.07	0.81	−.37*	−1.89	0.78	−.33*
PA aggregate				1.76	0.74	.31*
R2		.44			.53
F for change in R2		5.32**			5.62*

Note. ** p < .01.

* p <.05.