Table 7.

Adjusted logistic regression estimates of number of substantiations predicting cannabis abuse, early age of onset of cannabis abuse and dependence, Brisbane, Australia.

Frequency of maltreatment		Adjusted OR (95%CI)^a
Frequency of maltreatment	Cannabis abuse	Early age of onset of cannabis abuse	Cannabis dependence	Early age of onset of cannabis dependence
Number of substantiations^b
Once only	1	1	1	1
Two or more times	1.51 (1.06–2.16)^*	1.97 (1.36–2.84)^****	1.87 (1.27–2.74)^***	2.67 (1.55–4.59)^****
Number of substantiations^c
Once only	1	1	1	1
Two or more times	1.52 (1.06–2.19)^*	2.09 (1.31–3.36)^****	1.88 (1.28–2.76)^***	2.71 (1.57–4.68)^****

Adjusted for gender at birth, maternal age at pregnancy, maternal smoking at pregnancy and 6 months postpartum and family poverty over the first 5 years of age, educational level and marital status at 21 years.

Models did not adjust for other forms of childhood maltreatment.

The analyses involved weighted data.

p <0.05;

^***

p <0.001;

^****

p <0.0001.