Table 4.
Associations of CPT performance with clinical, cognitive, and functional variables within schizophrenia sample
| Schizophrenia Patients | ||||||||
|---|---|---|---|---|---|---|---|---|
| Degraded Stimulus CPT | CPT Identical Pairs Version | |||||||
| N | d' | Hit Rate | False Alarm Rate | N | 3-digit d' | N | 4-digit d' | |
| Visual Acuity | 1118 | .04 | .00 | −.09** | 1166 | .17*** | 1128 | .17*** |
| SANS Global Sum | 1134 | .04 | .01 | −.06* | 1184 | −.04 | 1147 | −.09** |
| SAPS Global Sum | 1133 | −.03 | −.03 | .00 | 1183 | −.08** | 1145 | −.05 |
| Negative Symptoms | 1134 | .06* | .03 | −.07* | 1184 | .01 | 1147 | −.05 |
| Psychotic Symptoms | 1133 | −.01 | −.02 | −.03 | 1183 | −.04 | 1145 | −.02 |
| Disorganization | 1133 | −.05 | −.04 | .05 | 1183 | −.10** | 1145 | −.07* |
| MMSE Score | 1103 | .19*** | .15*** | .15*** | 1153 | .29*** | 1116 | .28*** |
| Yrs Education | 1139 | .11*** | .11*** | −.02 | 1190 | .19*** | 1152 | .20*** |
| UPSA-B | 1111 | .21*** | .21*** | .10*** | 1161 | .31*** | 1125 | .29*** |
| RFS | ||||||||
| Work | 792 | .05 | .00 | −.08* | 829 | .08* | 796 | .17*** |
| Independent | 792 | .05 | .04 | −.06 | 829 | .15*** | 796 | .16*** |
| Family | 792 | −.02 | .00 | −.01 | 829 | .09* | 796 | .09* |
| Social | 789 | −.05 | .01 | .08* | 826 | .00 | 793 | .04 |
*
p < .05
**
p < .01
***
p < .001
Note: CPT = Continuous Performance Test; SANS = Schedule for Assessment of Negative Symptoms; SAPS = Schedule for Assessment of Positive Symptoms; Negative Symptoms, Psychotic Symptoms, and Disorganization are SANS/SAPS dimensions from Andreasen et al. (1995); MMSE = Mini-Mental State Examination; UPSA-B = UCSD Performance-based Skills Assessment; RFS = Role Functioning Scale.