Factor | Number in sample | Percentage with history of cannabis use (%) | Univariate analysis OR (95% CI), p value | *Multivariable analysis OR (95% CI), p value |
---|---|---|---|---|
Age <16 years | 19 | 10.5 | 0.11 (0.03 to 0.48), p=0.003 | 0.12 (0.03 to 0.53), p=0.005 |
Age 16–25 years | 1234 | 51.7 | Reference | Reference |
Age 26–35 years | 747 | 39.0 | 0.60 (0.50 to 0.72), p<0.001 | 0.70 (0.57 to 0.85), p=0.017 |
Age >35 years | 26 | 30.8 | 0.42 (0.18 to 0.96), p=0.04 | 0.48 (0.20 to 1.14), p=0.006 |
Female | 731 | 30.5 | 0.35 (0.29 to 0.43), p<0.001 | 0.39 (0.32 to 0.48), p<0.001 |
Male | 1295 | 55.3 | Reference | Reference |
White | 616 | 49.8 | 1.21 (0.99 to 1.48), p=0.06 | 1.17 (0.95 to 1.45), p=0.15 |
Asian | 126 | 38.9 | 0.78 (0.53 to 1.13), p=0.19 | 0.84 (0.56 to 1.25), p=0.38 |
Black | 1005 | 45.1 | Reference | Reference |
Other | 279 | 46.6 | 1.06 (0.81 to 1.39), p=0.65 | 1.13 (0.84 to 1.50), p=0.42 |
Married/cohabiting | 153 | 28.8 | 0.41 (0.28 to 0.59), p<0.001 | 0.56 (0.38 to 0.82), p=0.003 |
Divorced/separated | 63 | 23.9 | 0.32 (0.18 to 0.57), p<0.001 | 0.47 (0.26 to 0.87), p=0.02 |
Single | 1727 | 49.4 | Reference | Reference |
Marital status not recorded | 83 | 31.3 | 0.47 (0.29 to 0.75), p=0.002 | 0.50 (0.30 to 0.82), p=0.006 |
Schizophrenia and related | 1097 | 48.4 | Reference | Reference |
Bipolar disorder | 100 | 52.0 | 1.15 (0.77 to 1.74, p=0.49) | 1.44 (0.93 to 2.22), p=0.10 |
Psychotic depression | 94 | 30.9 | 0.48 (0.30 to 0.75, p=0.001) | 0.56 (0.35 to 0.90), p=0.02 |
Schizoaffective disorder | 35 | 34.2 | 0.56 (0.27 to 1.13, p=0.10) | 0.72 (0.35 to 1.51), p=0.39 |
Drug-induced psychosis | 63 | 79.0 | 4.10 (0.62 to 0.92, p<0.001) | 3.12 (1.64 to 5.88), p<0.001 |
Other psychotic disorder | 637 | 41.6 | 0.76 (0.62 to 0.92, p=0.006) | 0.79 (0.64 to 0.97), p=0.02 |
*Multivariable analysis adjusted for all factors presented in table (and no others).