Table 1.

Descriptive data of study participants.

TD Group				ADHD Group
Age	Male/Female	Total		Age	Male/Female	Total	IQ
4	6/3	9
5	9/5	14
6	4/7	11
7	13/19	32		7	4/2	6	110.8 (10.9)
8	22/14	36		8	3/1	4	101.8 (20.7)
9	19/21	40		9	8/2	10	94.0 (9.0)
10	17/20	37		10	5/1	6	99.4 (6.2)
11	8/18	26		11	7/0	7	103.9 (10.4)
12	9/9	18
21–29	19/6	25
Total	126/122	248		Total	27/6	33	101.3 (12.9)

SD in parentheses. IQ was assessed using the Wechsler Intelligence Scale for Children-Third Edition (WISC-III).