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. Author manuscript; available in PMC: 2013 Jun 24.
Published in final edited form as: Prog Neuropsychopharmacol Biol Psychiatry. 2011 Dec 30;37(1):161–168. doi: 10.1016/j.pnpbp.2011.12.011

Table 1.

Demographic and cognitive variable for patients with schizophrenia (SP) and healthy controls (HC).

SP mean (SD) HC mean (SD) p value Cohen’s d

Demographics
 Age 36.75 (13.31) 35.68 (12.26) p = 0.755 0.09
 Education Level* 4.14 (1.51) 4.71 (1.46) p = 0.156 −0.39
 Parental Education 4.29 (2.24) 4.68 (1.66) p = 0.478 −0.20
Cognition Indices
 Attention/Inhibition 44.33 (6.99) 52.40 (3.70) p = 0.000 −1.46
 Learning/Memory 37.04 (8.68) 44.38 (9.78) p = 0.006 −0.81
 Working Memory 41.46 (10.67) 50.54 (8.38) p = 0.001 −0.96
 Processing Speed 39.27 (9.72) 55.12 (5.52) p = 0.000 −2.03
 Executive 41.07 (7.58) 49.88 (5.01) p = 0.000 −1.39
Intelligence
 VIQ 99.48 (13.69) 108.15 (11.40) p = 0.016 −0.70
 PIQ 104.93 (18.27) 116.00 (10.31) p = 0.009 −0.76
 WTAR 104.30 (12.99) 111.58 (12.04) p = 0.039 −0.59

Abbreviations: VIQ = Verbal Intelligence Quotient; PIQ = Performance Intelligence Quotient; WTAR = Wechsler Test of Adult Reading

*

Education levels as follows: 1 = 6th grade education, 4 = high school graduate, 6 = college graduate