Table 2.
Crude model | Multivariable model | Multivariable model | Multivariable model | Multivariable model | ||||||
---|---|---|---|---|---|---|---|---|---|---|
Adolescent cannabis use | RR | 95% CI | RR | 95% CI | RR | 95% CI | RR | 95% CI | RR | 95% CI |
Never | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – |
1–10 times | 1.11 | 1.01–1.21 | 1.02 | 0.94–1.11 | 1.10 | 1.00–1.20 | 1.03 | 0.94–1.13 | 1.05 | 0.96–1.15 |
11–50 times | 1.27 | 1.08–1.51 | 1.14 | 0.96–1.34 | 1.15 | 0.98–1.36 | 1.07 | 0.89– 1.29 | 1.07 | 0.89–1.29 |
> 50 times | 1.72 | 1.49–1.98 | 1.43 | 1.24–1.66 | 1.37 | 1.18–1.59 | 1.26 | 1.04–1.53 | 1.26 | 1.04–1.53 |
Childhood/adolescence | ||||||||||
Parental SEP | ||||||||||
Non‐manual occupation | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – | 1.00 | – |
Manual occupation | 1.39 | 1.33–1.46 | 1.35 | 1.27–1.38 | 1.19 | 1.14–1.25 | 1.18 | 1.13–1.24 | 1.13 | 1.08–1.19 |
No occupation | 1.54 | 1.34–1.76 | 1.44 | 1.25–1.64 | 1.26 | 1.10–1.44 | 1.24 | 1.09–1.42 | 1.20 | 1.05–1.37 |
Divorced parents | 1.40 | 1.32–1.49 | 1.28 | 1.20–1.36 | 1.21 | 1.14–1.29 | 1.19 | 1.12–1.27 | 1.17 | 1.10–1.25 |
Contact with police or childcare authorities | 1.48 | 1.41–1.54 | 1.37 | 1.31–1.44 | 1.26 | 1.20–1.31 | 1.19 | 1.13–1.25 | 1.16 | 1.11–1.22 |
IQ | 1.37 | 1.34–1.39 | 1.28 | 1.25–1.31 | 1.26 | 1.23–1.29 | 1.18 | 1.15–1.21 | ||
Social maturity | 1.26 | 1.23–1.29 | 1.11 | 1.08–1.14 | 1.11 | 1.08–1.14 | 1.09 | 1.06–1.12 | ||
Psychiatric diagnosis | 1.38 | 1.30–1.46 | 1.01 | 0.95–1.08 | 1.00 | 0.94–1.07 | 1.01 | 0.95–1.08 | ||
Cigarette smoking | ||||||||||
None | 1.00 | – | 1.00 | – | 1.00 | – | ||||
1–10 cigarettes/day | 1.34 | 1.27–1.41 | 1.17 | 1.11–1.23 | 1.14 | 1.08–1.20 | ||||
> 10 cigarettes/day | 1.54 | 1.46–1.62 | 1.24 | 1.17–1.31 | 1.18 | 1.12–1.25 | ||||
Risky alcohol use | 1.48 | 1.40–1.56 | 1.06 | 0.99–1.12 | 1.04 | 0.98–1.10 | ||||
Illicit drug use | ||||||||||
None | 1.00 | – | 1.00 | – | 1.00 | – | ||||
Yes | 1.29 | 1.14–1.46 | 1.02 | 0.87–1.20 | 1.03 | 0.87–1.21 | ||||
Yes, injected | 1.75 | 1.37–2.22 | 1.05 | 0.80–1.38 | 1.01 | 0.77–1.32 | ||||
Adulthood | ||||||||||
Level of education | ||||||||||
Tertiary | 1.00 | – | 1.00 | – | ||||||
Secondary | 2.10 | 1.97–2.24 | 1.61 | 1.49–1.74 | ||||||
Primary | 2.43 | 2.27–2.60 | 1.63 | 1.52–1.74 | ||||||
Psychiatric disorder | 1.87 | 1.72–2.04 | 1.46 | 1.34–1.59 | ||||||
Drug‐related disorder | 1.77 | 2.00–2.62 | 1.28 | 0.85–0.90 | ||||||
RR = relative risk; 95% CI = 95% confidence interval; SEP = socio‐economic position.