Table 1

Characteristics of the study groups

CharacteristicGroup; mean (and SD)*Statistics
Control (n = 75)Schizophrenia (n = 71)Testdfp
Age, yr39.73 (10.94) [range 24–60]40.48 (11.89) [range 18–62]t = 0.401440.69
Male/female39/3646/25χ2 = 0.7810.34
Right-handed/ left-handed61/1459/12χ2 = 0.1610.69
EthnicityEuropeanEuropean
Age at onset, yr26.43 (9.29)
Duration of illness, yr13.92 (10.79)
No. hospitalizations4.29 (8.15)
Antipsychotic lifetime treatment, yr12.55 (10.64)
BPRS total score44.67 (19.47)
 Negative symptoms11.64 (4.95)
 Positive symptoms11.39 (6.69)

  • BPRS = Brief Psychiatric Rating Scale; SD = standard deviation.

  • ↵* Unless otherwise indicated.