Table 1a.

Descriptive characteristics by pregnancy status among US women 12 to 44 years old (N=97,788).

Variables	% Pregnant (n=3,267)	% NotPregnant¹ (n=94,521)	p-value
Age			<0.001
12-17	2.88	18.19
18-25	36.86	24.59
26-44	60.26	57.23
Race²			0.56
African American (non-Hispanic)	15.38	13.96
Hispanic	18.96	19.39
Other	8.47	8.86
White (non-Hispanic)	57.19	57.79
Education³			<0.001
High school diploma or above	81.39	71.80
Less than high school diploma	18.61	28.20
Marital status			<0.001
Married	58.62	35.57
Unmarried⁴	41.38	64.43
Poverty⁵			0.04
Less than 100% of threshold	25.65	22.58
100%-199% of threshold	21.03	22.13
200% or more of threshold	53.33	55.29
Insurance Coverage			<0.001
Yes	90.75	81.62
No	9.25	18.38
Alcohol use – past month			<0.001
Yes	9.16	50.54
No	90.84	49.46
Alcohol abuse – past year			0.66
Yes	3.25	3.52
No	96.75	96.48
Alcohol dependence – past year			<0.05
Yes	2.51	3.39
No	97.49	96.61
Tobacco use – past month			<0.001
Yes	16.46	24.23
No	83.54	75.77
Nicotine dependence – past month			0.19
Yes	10.58	11.71
No	89.42	88.29

Data derived from the National Survey of Drug Use and Health 2010-2013

Proportions weighted to reflect the US population

p-values obtained from designed-based F-tests

Women 12 to 44 years old who were unsure of their pregnancy status (n=466) were grouped in the not pregnant reference group

Other race category includes non-Hispanic Native American/Alaskan Natives, non-Hispanic Hawaiians/other Pacific Islanders, non-Hispanic Asians, and people reporting more than one race (other than Hispanic)

Persons 12 to 17 years old (n=35,662) were included in the less than high-school group

⁴

Participants 14 years old and younger (n=17, 211) were not asked questions regarding marital status (i.e., legitimate skip in respondents in the NSDUH Survey). These participants were included in the unmarried group in these analyses

⁵

Persons 18 to 22 years old living in a college dorm (n=1,493) were grouped with persons living at <100 of the US Census Bureau Poverty Threshold