Characteristics | CHR | HC | Paired t | P value |
n | 58 | 58 | NA | NA |
Education, mean (SD) | 12.93 (3.14) | 14.36 (2.88) | 2.56 | <0.001 |
VFT performance, mean (SD) | 6.72 (3.00) | 8.59 (3.36) | 3.14 | 0.003 |
SIPS/SOPS | ||||
P1 | 2.79 (1.91) | NA | NA | NA |
P2 | 2.21 (1.85) | NA | NA | NA |
P3 | 0.54 (1.07) | NA | NA | NA |
P4 | 1.24 (1.57) | NA | NA | NA |
P5 | 0.55 (1.03) | NA | NA | NA |
P_total | 7.33 (3.66) | NA | NA | NA |
N_total | 9.50 (5.66) | NA | NA | NA |
D_total | 3.78 (2.99) | NA | NA | NA |
G_total | 6.48 (3.74) | NA | NA | NA |
GAF_current | 59.75 (8.06) | NA | NA | NA |
GAF_past | 75.62 (6.55) | NA | NA | NA |
MCCB (T-score) | ||||
Speed of processing, mean (SD) | 47.05 (10.67) | 55.48 (9.41) | 4.51 | <0.001 |
Attention/vigilance, mean (SD) | 48.56 (8.23) | 53.91 (7.68) | 3.61 | <0.001 |
Working memory, mean (SD) | 40.10 (11.65) | 47.79 (9.43) | 3.91 | <0.001 |
Verbal learning, mean (SD) | 43.07 (10.17) | 50.29 (8.07) | 4.22 | <0.001 |
Visual learning, mean (SD) | 49.88 (7.89) | 53.24 (7.31) | 2.38 | 0.028 |
Reasoning and problem-solving, mean (SD) | 50.22 (9.21) | 54.19 (8.03) | 2.47 | 0.022 |
Social cognition, mean (SD) | 35.60 (7.41) | 38.63 (7.14) | 2.09 | 0.039 |
CHR, clinical high risk; D, disorganised symptoms; G, general symptoms; GAF, global assessment of function; HC, healthy control; MCCB, Measurement and Treatment Research to Improve Cognition in Schizophrenia (MATRICS) Consensus Cognitive Battery; N, negative symptoms; NA, not applicable; P1, unusual thought content/delusion ideas; P3, grandiosity; P, positive symptoms; P2, suspiciousness/persecutory ideas; P4, perceptual abnormalities/hallucinations; P5, disorganised communication; SD, standard deviation; SIPS/SOPS, Structured Interview for Prodromal Symptoms/Scale of Prodromal Syndrome; VFT, verbal fluency test.