Table 1.

Participant characteristics.

	Controls	Users
	n = 14	n = 14
Characteristics (mean ± SD)
Age	17.3 ± 1.3	17.6 ± 1.0
WASI total IQ score	104.8 ± 9.4	99.6 ± 7.6
FFISS	37.8 ± 15.2	34.7 ± 17.2
BIS-11 attentional	13.9 ± 3.7	17.4 ± 4.2*
BIS-11 motor	20.1 ± 3.1	24.2 ± 4.0*
BIS-11 nonplanning	21.0 ± 3.4	23.8 ± 5.0
Gender (n (%))
Male	11 (76%)	11 (76%)
Female	3 (24%)	3 (24%)
Ethnicity (n (%))
African-American	2 (14%)	4 (29%)
Caucasian	5 (36%)	4 (29%)
Hispanic	7 (50%)	6 (42%)

^* P < 0.05.