Table 1.
| PSZ (N=21) | HCS (N=16) | Statistic P-value |
|
|---|---|---|---|
| Age | 36.2 ± 11.0 (range 20–53) |
36.5 ± 14.5 (range 19–53) |
t(35)=.06 P=0.95 |
| Male : Female | 13 : 8 | 11 : 5 | χ2=0.19 P=0.67 |
| Afr Am : Cauc : Other | 6 : 14 : 1 | 4 : 11 : 1 | χ2=0.09 P=0.96 |
| Education (years) | 12.8 ± 2.7 | 14.1 ± 1.7 | t(35)=1.76 P=0.088 |
| Parental Education (yrs) a | 13.1 ± 3.0 | 14.3 ± 2.0 | t(35)=1.40 P=0.17 |
| Estimated IQ bf | 104.1 ± 13.2 | 115.6 ± 7.3 | t(35)=3.12 P<0.005 |
| MCCB cf | 37.9 ± 13.1 | 53.2 ± 6.2 | t(35)=4.30 P<0.001 |
| WRAT 4 df | 97.8 ± 14.8 | 110.3 ± 13.0 | t(35)=2.67 P<0.02 |
| WTAR e | 101.0 ± 18.7 | 111.6 ± 9.7 | t(35)=2.06 P<0.05 |
| Smokers : Non-smokers | 6 : 15 | 2 : 14 | χ2=1.38 P>0.2 |
| FTND of current smokers f | 3.5 ± 2.4 | 3.5 ± 2.8 | t(6)=0.24 P>0.8 |
| Systolic blood pressure (mm Hg) g | 125.2 ± 12.0 | 122.9 ± 15.9 | t(35)=0.49 P>0.6 |
| Diastolic blood pressure (mm Hg) g | 76.2 ± 7.6 | 73.8 ± 9.8 | t(35)=0.87 P>0.3 |
a
Average over maternal and paternal education
b
Based on vocabulary and matrix reasoning subscales of the Wechsler Abbreviated Scale of Intelligence (Wechsler, 1999)
c
Composite score on the MATRICS Consensus Cognitive Battery (Nuechterlein and Green 2006)
d
Wide Range Achievement Test (Wilkinson and Robertson, 2006)
e
Wechsler Test of Adult Reading (Wechsler, 2001)
f
Fagerstrom Test for Nicotine Dependence (Heatherton et al., 1991)
g
taken during screening