Table 1. Demographic and clinical characteristics of subjects.

Characteristic	Healthy controls (N=102)		Schizophrenia patients (N=94)		Analysis
	Mean	s.d.	Mean	s.d.	t/χ2	df	P
Age (years)	33.4	10.6	33.6	7.7	t=0.15	194	0.88
Gender (males:females)	45:57		52:42		χ2=2.46	1	0.12
Illness duration (months)			120.1	89.4
Positive and Negative Syndrome Scale
Positive subscore			16.6	7.9
Negative subscore			20.3	8.8
Current antipsychotic dosage (chlorpromazine equivalents, mg per day)			450.4	341.0