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. 2015 Mar 6;10(3):e0119176. doi: 10.1371/journal.pone.0119176

Table 1. Demographic and clinical characteristics of schizophrenias and healthy comparison subjects.

Characteristic Healthy Comparison Subjects (N = 100) Schizophrenia Patients (N = 91) Analysis
Mean SD Mean SD t/χ2 df p
Age(years) 33.3 10.5 33.8 7.7 t = -0.34 189 0.73
Sex M45 F55 M51 F40 χ2 = 2.32 1 0.13
Duration of illness (months) 120.1 90.7
PANSS positive score 16.6 8.0
PANSS negative score 20.0 8.4
Current antipsychotic dosage (chlorpromazine equivalents) (mg/d) 447.4 338.8

PANSS indicates Positive and Negative Syndrome Scale.