Table 3 Clinical characteristics of schizophrenia and psychiatric history in cannabis users and non-users
Non-users of cannabis | Cannabis users | P | |
|---|---|---|---|
Age at diagnosis, mean (SD) | 30.5 (6.8) | 21.2 (9,3) | 0.0026 |
History of hospitalisation, n (%) | 16 (61.5) | 46 (66.6) | 0.5033 |
Annual hospitalisations | |||
Average number (DS) | 3.7 (2.5) | 4.3 (3.3) | 0.6701 |
Average duration (days ± SD) | 31.6 (7.8) | 29.2 (6.0) | 0.5428 |
Reasons for hospitalisation, n (%) | 0.1037 | ||
Behavioural problems | 17 (65.3) | 31 (44.9) | |
Suicidal threat | 0 (0) | 7 (10.1) | |
Addictive behaviour | 3 (11.5) | 16 (23.1) | |
Psychotic relapse | 20 (76.9) | 58 (84.0) | |
Other | 10 (38.4) | 25 (36.2) | |
Family history, n (%) | |||
PANSS score, average (DS) | |||
Positive scale | 18 (4.3) | 39 (6.6) | |
Negative scale | 29 (7.8) | 41 (8.0) | |
General psychopathology scale | 67 (12.6) | 102 (13.1) | |
Total score (/210) | 104 (8.2) | 181 (15.4) | 0.0001 |
CRDPSS score, average (SD) | |||
Hallucinations | 1 (0.0) | 3 (1.6) | |
Delusional ideas | 0 (0.0) | 2 (0.7) | |
Disorganised speech | 1 (1.2) | 4 (0.0) | |
Abnormal psychomotor behaviour | 2 (0.3) | 3 (1.2) | |
Negative symptoms | 2 (1.3) | 3 (1.3) | |
Cognitive deficit | 1 (0.8) | 2 (0.8) | |
Depression | 2 (1.6) | 4 (0.6) | |
Mania | 1 (1.2) | 3 (1.2) | |
Total score (/32) | 10 (3.4) | 25 (4.7) | 0.0021 |