Table 1.

Demographic, behavioral, and clinical measures

	All healthy controls, N = 39	Matched healthy controls, N = 23	Patients with schizophrenia, N = 15	p value all healthy controls-schizophrenia	p value matched healthy controls-schizophrenia
Male gender	18 (46%)	11 (48%)	8 (53%)	0.43	1.0
Age ± SD	33.5 ± 8.2	36.0 ± 8.3	35.1 ± 11.0	0.56	0.79
Parental SES	42.5 ± 14.5	43.8 ± 12.8	42.1 ± 14.7	0.93	0.73
African American	14 (36%)	12 (52%)	8 (53%)	0.20	1.0
Right-handed	38 (97%)	22 (96%)	13 (87%)	0.18	0.55
Removed fMRI volumes	59.2 ± 76.2	84.5 ± 89.5	95.2 ± 74.6	0.12	0.70
2-back AHR	0.77 ± 0.20	0.66 ± 0.20	0.60 ± 0.20	0.010	0.41
Differential accuracy (2-back − 1-back)	−0.08 ± 0.10	−0.12 ± 0.12	−0.12 ± 0.09	0.24	0.89
Positive symptoms (SAPS global total score)	—	—	4.6 ± 2.8	—	—
Negative symptoms (SANS global total score)	—	—	8.1 ± 5.1	—	—
Duration of illness (years)	—	—	16.8 ± 11.2	—	—