Table 1.

Clinical characteristics of ADHD children and control children tested.

	TD	ADHD	Subsample of children with ADHD treated with MPH
	N = 38	N = 38	N = 26
CLINICAL DATA
Age (years), mean ± SEM	9.70 ± 0.43	9.82 ± 0.37	9.87 ± 0.48
Height (cm), mean ± SEM	133 ± 40	135 ± 31
Weight (Kg), mean ± SEM	34.2 ± 2.5	33.3 ± 3.3
Gender (male/female)	30/8	34/4	24/2
ADHD-RS
ADHD-RS total score, mean ± SEM	4 ± 0.8	31.8 ± 1.1	38.2 ± 1.1	28.2 ± 2.1#
ADHD-RS Inattention subscore, mean ± SEM	–	20.0 ± 0.6	19.5 ± 0.8	14.3 ± 1.0#
ADHD-RS Hyperactivity/Impulsivity subscore, mean ± SEM	–	18.8 ± 0.8	18.7 ± 1.0	13.9 ± 1.1#
MPH Dose in mg/kg, mean ± SEM	–	–	0.60 ± 0.04
WECHSLER scale (WISC-IV) scores, mean ± sem
Verbal comprehension subscale	–	100.1 ± 2.8	99.8 ± 3.9
Perceptual reasoning subscale	–	94.8 ± 3.0	95.0 ± 4.1
Working memory subscale	–	84.1 ± 3.3	85.5 ± 3.2
Processing speed subscale	–	89.8 ± 2.4	90.2 ± 3.1
Similarities test	10.36 ± 0.4	10.18 ± 0.5	10.1 ± 0.7
Matrix reasoning test	10.54 ± 0.5	9.81 ± 0.4	10.2 ± 0.5

^#ADHD-RS scores after MPH treatment.