Table 2.
General Characteristics
| Transition (n = 18) | No Transition (n = 43) | Total CHR Group (n = 61) | Statistic | P Value | |
|---|---|---|---|---|---|
| Mean age (SD) in years | 20.3 (4.0) | 19 (3.8) | 19.9 (3.9) | t = −1.18 | .24 |
| Gender (male/female) | 13/5 | 27/16 | 40/21 | χ2 = 0.50 | .56 |
| Mean premorbid IQ (SD) | 105.35 (11.1) | 107.94 (9.6) | 106.11 (10.7) | t = −0.86 | .38 |
| Medication | χ2 = 0.99 | .80 | |||
| None | 10 | 25 | 35 | ||
| Antipsychotics | 5 | 8 | 13 | ||
| Antidepressants | 1 | 5 | 6 | ||
| Other | 2 | 5 | 7 | ||
| Inclusion category | χ2 = 4.80 | .73 | |||
| APS | 5 | 9 | 14 | ||
| APS + BS | 10 | 26 | 36 | ||
| APS + BS + BLIPS | 1 | 3 | 4 | ||
| APS + GR + BS | 1 | 1 | 2 | ||
| BLIPS | 0 | 1 | 1 | ||
| BLIPS + APS | 1 | 0 | 1 | ||
| GR + BS | 0 | 1 | 1 | ||
| GR + BS + BLIPS | 0 | 2 | 2 | ||
| Cannabis use (in past year) | 5 (27.8%) | 20 (46.5%) | 25 (41%) | χ2 = 1.85 | .45 |
| SIPS social anhedonia and withdrawal | 3.83 (1.50) | 2.40 (2.04) | 2.82 (2.00) | t = −3.14 | .003 |
| Pz P300 amplitude | 10.49 (1.92) | 16.47 (5.96) | 14.71 (5.78) | t = 5.90 | <.0001 |
| Semantic verbal fluency | 18.76 (4.22) | 21.09 (5.25) | 20.43 (5.06) | t = 1.63 | .11 |
| Urbanicity | 1.78 (.94) | 2.33 (1.50) | 2.16 (1.11) | t = 1.94 | .06 |
| PAS social-sexual aspects (12–15y) | 2.72 (1.57) | 1.42 (1.53) | 1.80 (1.64) | t = −3.01 | .004 |
| PAS social-personal adjustment | 3.44 (1.50) | 2.15 (.92) | 2.55 (1.16) | t = −4.60 | <.0001 |
Note: APS, attenuated positive symptoms; BS, basic symptoms; BLIPS, brief limited intermittent psychotic symptoms; GR, genetic risk plus reduced functioning; CHR, clinically at high risk; Pz, midline parietal. Abbreviations are explained in the footnote to table 1.