Table 1.

Comparison of the demographic characteristics for first-episode schizophrenia and healthy control

	FESZ (Mean±SD) (n=17)	HC (Mean±SD) (n=17)	t	df	p
Age at scan(years)	21.5±4.8	23.1±3.5	−1.11	32	0.27
Gender(Male/Female)	13/4	12/5			1.00a
Education(years)	13.7±3.1	14.1±1.7	−0.50	23.7	0.62
Parental SES	2.3±1.5	1.7±0.7	1.25	20.3	0.23
Current estimated Iintellectual ability	114.1±11.7	118.9±10.4	−1.1	25	0.27
Ethnicity (H/N/U)b	4/13/0	1/15/1
Asian East  Southwest	1
Asian, Western		9
Black or African  American	1	4
White	14	3
Other	1	16
Medication duration (months)c	4.56±3.10
Medication dose (mg) d	393.3 ±358.2
WCSTe categories completed	3.2±1.7	5.4±1.4	−3.4	23	0.02

FESZ, first-episode schizophrenia; HC, healthy control; SES; socioeconomic status. Current iIntellectual ability was estimated with 2 subtests from the measured by WASI or WAIS-III IQ

^aFisher’s exact test.

^bEthnicity: H=Hispanic or Latino; N=Not Hispanic or Latino; U=Unknown

^cAntipsychotic medication duration of all patients

^dAntipsychotic medication dose of all patients equivalent to chloropromazine at the time of scan.

^eWCST: the Wisconsin Card Sorting Test