Table 2.

Bivariate relationships between outcome variables and demographics, ACE count and supportive childhood relationships

		Current smoker	Early alcohol initiation	Problem alcohol use	Drug use	Therapy	Suicide attempt
All	n	14 534	14 381	14 553	14 610	14 396	14 574
	%	22.7	18.9	7.5	16.1	8.7	3.5
Gender	Male	26.5	25.6	10.0	20.6	8.7	2.3
	Female	20.2	14.5	5.9	13.2	8.6	4.3
	χ2	79.554	273.368	83.925	138.456	0.090	41.215
	P	<0.001	<0.001	<0.001	<0.001	0.764	<0.001
Age group	18–19	20.1	19.4	7.2	12.3	8.8	3.3
	20–21	23.5	18.9	7.4	18.7	8.1	3.6
	22–25	26.2	17.9	8.6	18.6	9.7	3.7
	χ2	44.262	2.695	5.881	102.986	6.582	1.585
	P	<0.001	0.260	0.053	<0.001	0.037	0.453
Childhood SES	Not low	22.3	18.5	6.5	15.7	8.1	2.7
	Low	24.3	20.3	11.6	17.9	10.7	6.7
	χ2	5.326	4.774	90.205	8.686	19.019	114.558
	P	0.021	0.029	<0.001	0.003	<0.001	<0.001
ACE count	0	18.7	15.3	4.6	10.8	4.7	0.9
	1	24.6	20.8	8.3	18.3	8.6	2.6
	2–3	29.3	24.6	11.7	24.8	15.8	7.4
	≥4	32.7	27.6	19.2	31.7	25.5	20.0
	χ2	187.993	165.192	322.284	463.572	605.318	927.148
	P	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001
Supportive childhood relationships	Higher	21.7	18.0	6.5	15.3	7.6	2.3
	Low	27.7	23.4	13.0	20.8	14.4	9.5
	χ2	41.535	36.922	120.119	44.690	114.782	302.908
	P	<0.001	<0.001	<0.001	<0.001	<0.001	<0.001

Notes: ACE, adverse childhood experiences; SES, socio-economic status.