Table 1.

Demographic and Clinical Characteristics of the Participants

	Controls (N = 32) (mean ± SD)	ADHD (N = 32)(mean ± SD)	Test statistic	p
Age	11.9 ± 0.4	11.1 ± 0.3	t = 1.78	0.081
Male/female	19/13	25/7	χ2 = 2.62	0.106
Full-scale IQ	108.1 ± 2.3	104.3 ± 2.4	t = 1.14	0.259
P inattent T	46.7 ± 1.0	66.8 ± 1.6	t = 10.64	<0.001
P hyp. imp. T	48.6 ± 1.7	71.8 ± 2.3	t = 8.15	<0.001
P DSM-IV T	47.7 ± 1.3	70.7 ± 1.8	t = 10.22	<0.001

P DSM-IV T, T score for sum of total raw scores; P inattent T, parent inattentive T score; P hyp. imp. T, parent hyperactive-impulsive T score.