Table 1.

Demographic and Cognitive features of the study groups

	Patients	Controls
Age	43.4 ± 8.4 (range 25–54)	43.5 ± 9.4 (range 22–54)
Male: Female	20:11	14:12
Ethnicitya: AA: A: C: O	9:1:19:2	9:0:17:0
Education (years)	13.1 ± 2.3	14.8 ± 2.1
Parental educationc	13.3 ± 3.3b	13.3 ± 2.8
WASI IQ	96.3 ± 13.3b	113.9 ± 12.8
WRAT-4	95.6 ± 12.5b	101.8 ± 16.4
WTAR	98.7 ± 15.1b	105.8 ± 15.5
MATRICS Total T score	32.3 ± 11.6b	50.3 ± 13.2

^aAA= African American, A=Asian, C= Caucasian, O = other

^bData unavailable for 1 patient.

^cAverage over mother’s and father’s years of education.