Table 2 Comparisons of the demographic and clinical characteristics of subjects belonging to the schizophrenia (SZ) with and without pre-onset cannabis use disorder (pre-onset CUD)
| Â | Total sample | SZ with no pre-onset CUD | SZ with pre-onset CUD | p |
|---|---|---|---|---|
Number of subjects | 171 | 140 | 31 | – |
Male [n (%)] | 114 (67.1%) | 84 (60.4%) | 30 (96.8%) | <0.001 |
Mean age at assessment [years (SD)] | 34.0 (11.7) | 35.4 (12.1) | 27.6 (6.8) | 0.001 |
Mean age at onset [years (SD)] | 23.7 (7.9) | 24.4 (8.5) | 20.9 (3.4) | 0.027 |
Mean age at cannabis use onset [years (SD)] | – | – | 18.3 (3.7) | – |
Mean duration of the illness [years (SD)] | 11.5 (11.1) | 12.6 (11.7) | 6.7 (6.7) | 0.007 |
Mean number of hospital admissions/illness duration | 0.6 (0.7) | 0.6 (0.8) | 0.6 (0.4) | 0.82 |
Personal history of suicide attempts [n (%)] | 75 (45.5%) | 65 (47.8%) | 10 (34.5%) | 0.19 |
Family history of schizophrenia [n (%)] | 16 (10.2%) | 12 (9.4%) | 4 (13.3%) | 0.53 |
Family history of mood disorders [n (%)] | 66 (44.0%) | 56 (46.3%) | 10 (34.5%) | 0.25 |
Family history of suicide attempts [n (%)] | 26 (17.6%) | 23 (19.3%) | 3 (10.3%) | 0.25 |