Table 2.

Prevalence of Substance Use by Sociodemographic Characteristics and Diagnoses ^a

	Tobacco Use (N=2,510)				Alcohol Use (N=2,440)
	N	%	95%CI	p	N	%	95%CI	p
Overall	682	28.3	(25.5, 31.1)	--	754	29.7	(26.1, 33.3)	--
Age (yrs)				<0.001				<0.001
12	69	13.5	(8.7, 18.2)		94	14.6	(9.9, 19.3)
13	146	22.9	(18.8, 26.9)		164	25.8	(19.6, 32.0)
14	196	30.2	(24.9, 35.5)		232	33.7	(28.1, 39.3)
15	271	49.1	(42.9, 55.3)		264	46.4	(39.0, 53.7)
Gender				0.63				0.80
Female	340	28.9	(25.2, 32.6)		381	29.2	(24.8, 33.6)
Male	342	27.7	(23.7, 31.6)		373	30.1	(24.5, 35.7)
Race/ethnicity				0.41				0.18
African American	210	25.2	(22.0, 28.4)		220	27.8	(24.8, 30.9)
Mexican American	226	28.1	(24.7, 31.6)		285	35.4	(29.0, 41.7)
Other race/ethnicity	52	27.2	(21.6, 32.8)		55	31.6	(21.6, 41.6)
White, non-Hispanic	194	29.3	(25.1, 33.4)		194	28.7	(24.2, 33.2)
Income to Poverty Ratio				<0.01				0.16
<1.00	224	38.0	(29.8, 46.1)		192	29.4	(23.2, 35.6)
1.00–1.85	161	34.1	(29.2, 38.9)		201	35.2	(29.0, 41.3)
>1.85–3.00	122	28.1	(22.1, 34.1)		146	30.4	(23.5, 37.2)
>3.00	145	21.7	(18.0, 25.3)		185	27.6	(23.1, 32.0)
Household Smoke				<0.001
Yes	214	44.7	(36.8, 52.7)		N/A
No	464	23.5	(20.9, 26.2)		N/A
Diagnoses				b				b
ADHD+CD	11	48.2	(23.1, 74.3)		10	54.2	(32.1, 74.7)
ADHD alone	35	38.1	(27.5, 47.5)		35	27.8	(17.7, 40.9)
CD alone	21	59.9	(33.2, 81.7)		10	29.1	(12.6, 53.7)
Neither	615	26.7	(23.8, 29.9)		699	29.5	(25.9, 33.4)

^aN reflects actual sample size, % is weighted to reflect national prevalence estimates

^bDifferences on outcomes by diagnosis are examined in adjusted models in Table 3.