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Pre-morbid psychiatric diagnoses of schizophrenia
| Total cases, n | Never used cannabis, n (%) | Ever used cannabis, n (%) | p | |
|---|---|---|---|---|
| Brief psychosis | 30 | 27 (22) | 3 (14) | 0.2 |
| Schizo-affective disorders | 4 | 3 (2) | 1 (5) | 0.2 |
| Other psychoses | 52 | 44 (36) | 8 (36) | 0.2 |
| Neurosis | 37 | 31 (25) | 6 (27) | 0.3 |
| Personality disorders | 21 | 17 (14) | 4 (18) | 0.2 |
