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Participant Characteristics.
| CHR (n = 543) | NC (n = 218) | Test Statistic t or Chi2 | p | |
|---|---|---|---|---|
| Male% | 58.2 | 55.1 | 0.65 | ns |
| Age (SD) | 18.7 (4.4) | 19.8 (4.9) | 2.9 | 0.004 |
| Tobacco% | 23.3 | 10.0 | 20.0 | 0.001 |
| Cannabis% | 55.8 | 42.4 | 9.5 | 0.002 |
| Stimulant% | 6.0 | 0.5 | 11.1 | 0.001 |
| Antipsychotic% | 11.0 | 0.0 | 26.2 | 0.001 |
| SOPS (SD) | ||||
| Positive | 11.5 (4.0) | 1.8 (3.0) | −35.5 | 0.001 |
| Negative | 11.4 (5.9) | 2.3 (3.4) | −25.6 | 0.001 |
| Disorganized | 4.8 (3.1) | 0.8 (1.4) | −23.1 | 0.001 |
| General | 9.0 (4.2) | 1.3 (2.2) | −32.9 | 0.001 |
