. 2012 Jan;38(1):104–113. doi: 10.1093/schbul/sbr172

Table 1.

Demographic and Clinical Characteristics of Participants

	Healthy Control		Schizophrenia Patient		Group Comparison
Variable	Mean	SD	Mean	SD	Group Comparison
Age (in years)	36.7	12.0	39.6	11.6	t = 1.73, P = .08
Gender (% males)	55		62		χ² = 1.17, P = .28
Ethnicity (% caucasian)	54.3		54.3		χ² = 0.14, P = .71
Personal education (in years)	14.8	2.02	13.3	2.2	t = 5.89, P < .0001
Father education (in years)	13.0	2.84	13.5	3.50	t = 1.35, P = .18
Mother education (in years)	13.3	2.52	13.3	2.79	t = 0.09, P = .92
Personal SES	38.6	10.3	26.0	10.2	t = 10.13, P < .0001
Parental SES	44.4	12.6	42.8	15.2	t = 0.90, P = .37
BPRS average for positive symptom items	NA		2.19	1.15
BPRS average negative symptom items	NA		1.82	0.73
BPRS average for disorganized symptomitems	NA		1.27	0.42

Note: SES, socioeconomic status as measured using the using the Barratt Simplified Measure of Social Status based on the Hollingshead Index.²⁰ BPRS, Brief Psychiatric Rating Scale.²¹^–²³