Table 2.
Descriptive statistics of assessments
| Clinical Mean (SD) |
Healthy Control Mean (SD) |
t | |
|---|---|---|---|
| BPRS total score | 40.60 (9.80) | 27.50 (4.14) | 9.88*** |
| PROMIS sleep disturbance | 18.41 (8.01) | 14.95 (5.27) | 2.50* |
| T-score | 46.68 (10.92) | 42.59 (8.22) | |
| PROMIS Sleep-Related Impairment | 18.12 (7.26) | 13.55 (5.71) | 3.22* |
| T-score | 50.98 (10.44) | 43.70 (9.93) | |
| MATRICS Consensus Cognitive Battery Domains (T-score) | |||
| Speed of processing | 30.11 (13.11) | 43.82 (17.01) | –3.54** |
| Attention/vigilance | 27.81 (10.67) | 39.68 (14.62) | –3.58** |
| Working memory | 33.85 (12.24) | 43.55 (10.54) | –3.76** |
| Verbal learning | 34.58 (9.02) | 46.82 (13.07) | –4.17*** |
| Visual learning | 34.85 (13.76) | 45.14 (16.08) | –2.77* |
| Reasoning and problem solving | 38.05 (8.14) | 40.62 (10.41) | –1.06 |
| Social cognition | 41.46 (14.44) | 42.64 (13.43) | –0.363 |
| Overall composite | 24.49 (12.83) | 38.86 (15.78) | –3.87** |
Note: BPRS = Brief Psychiatric Rating Scales; PROMIS = Patient-Reported Outcomes Measurement Information System; ns for the cognitive domains for the clinical group ranged from 87 to 96 while ns for healthy control group ranged from 21 to 22 because not all participants completed each subscale in the cognitive battery
* p < 0.05; ** p = 0.001; *** p < 0.001