Covariate | Late-onset occasional OR (95% CI) | Early-onset occasional OR (95% CI) | Regular OR (95% CI) | p Value |
---|---|---|---|---|
Sex | ||||
Male | 1.00 ref | <0.001 | ||
Female | 0.86 (0.69 to 1.08) | 0.94 (0.56 to 1.58) | 0.32 (0.22 to 0.48) | |
Housing tenure | ||||
Mortgaged/owned home | 1.00 ref | <0.001 | ||
Rented | 1.52 (1.04 to 2.23) | 0.87 (0.27 to 2.84) | 1.76 (0.98 to 3.16) | |
Subsidised rented | 0.89 (0.54 to 1.46) | 1.10 (0.39 to 3.10) | 2.32 (1.39 to 3.87) | |
Sibling order | ||||
First child | 1.00 ref | <0.001 | ||
Second child | 1.11 (0.85 to 1.43) | 2.00 (1.03 to 3.86) | 1.27 (0.85 to 1.88) | |
Third child or higher | 1.35 (0.98 to 1.85) | 3.53 (1.77 to 7.01) | 1.24 (0.73 to 2.10) | |
Home overcrowding | ||||
Up to one person per room | 1.00 ref | 0.21 | ||
>1 person per room | 2.16 (1.29 to 3.63) | 0.70 (0.08 to 6.19) | 1.32 (0.47 to 3.71) | |
Maternal education | ||||
Qualifications beyond high school | 1.00 ref | <0.001 | ||
High school qualifications | 0.54 (0.41 to 0.71) | 0.53 (0.29 to 0.96) | 0.94 (0.63 to 1.41) | |
No high school qualifications | 0.53 (0.37 to 0.75) | 0.28 (0.10 to 0.81) | 1.02 (0.63 to 1.63) | |
Household income | ||||
High (top quintile) | 1.00 ref | <0.001 | ||
Middle high | 0.64 (0.45 to 0.92) | 1.28 (0.65 to 2.52) | 0.36 (0.17 to 0.76) | |
Middle | 0.79 (0.56 to 1.11) | 0.67 (0.27 to 1.62) | 1.14 (0.68 to 1.90) | |
Middle low | 0.75 (0.52 to 1.08) | 1.02 (0.46 to 2.23) | 1.08 (0.63 to 1.86) | |
Low (bottom quintile) | 0.77 (0.52 to 1.15) | 0.44 (0.13 to 1.54) | 1.08 (0.61 to 1.94) | |
Maternal alcohol use when child aged 12 | ||||
<14 units per week | 1.00 ref | 0.003 | ||
14+ units per week | 1.93 (1.49 to 2.49) | 2.57 (1.47 to 4.52) | 1.59 (1.05 to 2.40) | |
Maternal alcohol binge when child aged 12 | ||||
No | 1.00 ref | <0.001 | ||
Yes | 1.58 (1.22 to 2.04) | 2.08 (1.18 to 3.64) | 1.51 (1.01 to 2.27) | |
Maternal smoking when child aged 12 | ||||
No | 1.00 ref | 0.001 | ||
Yes | 1.30 (0.91 to 1.86) | 2.60 (1.42 to 4.78) | 2.92 (1.89 to 4.51) | |
Maternal cannabis use when child aged 9 | ||||
No | 1.00 ref | <0.001 | ||
Yes | 3.23 (1.87 to 5.56) | 9.38 (4.37 to 20.2) | 11.3 (6.88 to 18.7) | |
Child smoking at 13 years | ||||
No | 1.00 ref | <0.001 | ||
Yes | 2.15 (1.39 to 3.33) | 15.2 (8.69 to 26.5) | 10.5 (6.96 to 16.0) | |
Child drinking alcohol at 13 years | ||||
No | 1.00 ref | <0.001 | ||
Less than weekly | 2.43 (1.75 to 3.37) | 7.89 (3.44 to 18.1) | 1.77 (0.90 to 3.46) | |
Weekly | 2.30 (1.47 to 3.60) | 25.0 (11.9 to 52.4) | 7.49 (4.72 to 11.9) | |
Child conduct problems at 11 years | ||||
Low | 1.00 ref | <0.001 | ||
Medium | 1.40 (1.06 to 1.84) | 1.43 (0.75 to 2.73) | 2.12 (1.37 to 3.28) | |
High | 1.39 (0.80 to 2.41) | 3.61 (1.61 to 8.12) | 5.60 (3.30 to 9.50) |
Estimates shown are multinomial ORs estimated using all available data for each covariate and ‘Non-user’ as the reference category for the cannabis use outcome. Omnibus p values are from Wald tests examining the overall association between each risk factor and cannabis use latent class membership.
Alcohol binge defined as 4+ units of alcohol on one occasion. One unit of alcohol defined as 0.8 g ethanol.