Table 2.

Descriptive statistics for impulsiveness (BIS-11) and K-SADS-PL

		Juvenile violent offenders (n = 30)	Normal controls (n = 28)	Statistical value	p
BIS
Total score		72.47$\pm$4.74	64.57$\pm$5.54	5.844	< 0.001
Attentional impulsiveness		19.40$\pm$3.07	22.14$\pm$2.41	185.500	< 0.001
Motor impulsiveness		24.20$\pm$2.98	21.43$\pm$3.34	3.342	0.001
Non-planning impulsiveness		28.87$\pm$3.35	21.00$\pm$2.09	10.804	< 0.001
Diagnosis of any disruptive behavioral disorder, n
Attention deficit Hyperactivity disorder		2	0	1.933	0.492
Oppositional defiance disorder		7	0	7.430	0.11
Conduct disorder		24	1	34.496	< 0.001
Previous diagnosis of alcohol abuse, nb		3	0	2.953	0.238
Previous diagnosis of drug abuse, nb		5	0	5.107	0.053

^b Note: They had not been off drugs or alcohol for at least ten months