Table 2.

Percentage distribution of demographics, by pattern of polysubstance use among NESARC respondents with alcohol dependence at Wave 1 (n = 1,172)

Wave 2 demographics	Alcohol Use Only (n = 351)		Alcohol and Tobacco Use (n = 402)		Alcohol, Tobacco, and Cannabis Use (n = 171)		Alcohol, Tobacco Cannabis, Cocaine and other Illicit Drug Use illicit drug(s) (n = 248)		P-value

	%	95% CI	%	95% CI	%	95% CI	%	95% CI

Mean age (yr)	36.6^3,4	[35.0, 38.3]	37.1^3,4	[35.7, 38.4]	31.4^1,2	[29.5, 33.3]	30.1^1,2	[28.8, 31.3]	<.0001
Sex
Male	59.9³	[53.4, 66.1]	68.4	[62.5, 73.7]	76.4¹	[67.5, 83.4]	71.5	[64.6, 77.5]	0.0166
Female	40.1³	[33.9, 46.6]	31.6	[26.3, 37.5]	23.6¹	[16.6, 32.5]	28.5	[22.5, 35.4]	0.0166
Race/ethnicity
White, Not Hispanic or Latino	63.8	[54.5, 72.2]	71.9	[66.0, 77.1]	64.8	[55.5, 73.1]	77.1	[70.0, 83.0]	0.0345
Black, Not Hispanic or Latino	13.3⁴	[9.4, 18.6]	9.6	[6.8, 13.3]	17.5⁴	[11.7, 25.4]	5.8^1,3	[3.3, 10.0]	0.0048
American Indian/Alaska Native, not Hispanic or Latino	0.7⁴	[0.2, 2.9]	2.6	[1.0, 6.2]	4.2	[1.6, 10.8]	6.4¹	[3.4, 11.8]	0.0399
Asian/Native Hawaiian/Pacific Islander, not Hispanic or Latino	1.6	[0.4, 6.1]	3.5	[1.7, 7.2]	0.9	[0.1, 6.6]	2.4	[0.8, 7.2]	0.4392
Hispanic or Latino	20.6⁴	[12.7, 31.8]	12.5	[8.9, 17.2]	12.5	[7.6, 20.0]	8.2¹	[5.2, 12.6]	0.0345
Current marital status
Currently married	45.0^3,4	[38.5, 51.7]	37.2³	[31.2, 43.6]	20.0^1,2	[13.5, 28.7]	24.5¹	[18.0, 32.4]	0.0002
Never married	36.6^3,4	[30.6, 43.0]	33.5^3,4	[28.0, 39.5]	54.5^1,2	[45.0, 63.7]	53.2^1,2	[45.4, 60.9]	0.0001
Highest grade or year of school completed
Less than HS	13.6	[9.6, 18.9]	15.6	[11.6, 20.8]	17.9	[11.6, 26.5]	14.4	[9.7, 20.8]	0.7737
HS or GED	23.0	[18.1, 28.8]	26.1	[21.1, 31.8]	20.8	[14.3, 29.2]	25.9	[19.5, 33.7]	0.6712
College degree or higher	29.2^2,3	[23.4, 35.8]	16.4¹	[12.0, 21.9]	16.9¹	[11.2, 24.8]	19.2	[14.1, 25.8]	0.0083
Total family income
$0 to $19,999	20.4⁴	[15.7, 26.0]	20.4⁴	[16.0, 25.6]	32.0	[23.5, 41.8]	32.2^1,2	[25.8, 39.4]	0.0086
$20,000 to $34,999	18.9	[14.3, 24.5]	24.4	[19.6, 29.8]	17.4	[11.5, 25.5]	27.1	[20.6, 34.8]	0.1840
$35,000 to $59,999	22.6	[18.0, 27.9]	25.2	[20.4, 30.6]	19.8	[13.7, 27.7]	18.7	[13.5, 25.4]	0.3810
$60,000 or more	38.2⁴	[32.2, 44.5]	30.1	[24.8, 35.9]	30.8	[21.9, 41.5]	22.0¹	[16.3, 28.9]	0.0061

Note: The superscript i (i = 1, 2, 3, 4) indicates a significant pairwise comparison with the pattern i (Bonferroni adjusted p < 0.05).