Table 1.

Baseline Characteristics of Participants by Incarceration Status, 2007–2017, Women's Interagency HIV Study

		Overall (N = 3,124)		Incarcerated during study period (N = 212)		Not incarcerated during study period (N = 2,912)
Characteristic	Category	n		n		n
Median age, years (IQR)		3,124	44 (37–50)	212	42 (35–48)	2,912	44 (37–50)
High school education or more (%)		2,036	65.2	119	56.1	1,917	65.8
Race (%)	White	582	18.6	23	10.9	559	19.2
	Black	2,116	67.7	163	76.9	1,953	67.1
	Other	426	13.6	26	12.3	400	13.7
Hispanic ethnicity (%)		635	20.3	33	15.6	602	20.7
Positive HIV status (%)		2,234	71.5	128	60.4	2,106	72.3
Site (%)	Bronx, NY	422	13.5	16	7.6	406	13.9
	Brooklyn, NY	449	14.4	22	10.4	427	14.7
	Washington, DC	346	11.1	20	9.4	326	11.2
	Los Angeles, CA	406	13.0	22	10.4	384	13.2
	San Francisco, CA	373	11.9	40	18.9	333	11.4
	Chicago, IL	353	11.3	37	17.5	316	10.9
	Chapel Hill, NC	186	6.0	19	9.0	167	5.7
	Atlanta, GA	247	7.9	19	9.0	228	7.8
	Miami, FL	130	4.2	8	3.8	122	4.2
	Birmingham, AL	104	3.3	5	2.4	99	3.4
	Jackson, MS	108	3.5	4	1.9	104	3.6
Incarceration before study period (%)		1,186	39.1	159	77.9	1,027	36.3
Exchanged sexa in past 6 months (%)		98	3.1	23	10.9	75	2.6
Alcohol use in past 6 months (%)	None	1,701	54.5	87	41.0	1,614	55.4
	>0–7 drinks/week	987	31.6	66	31.1	921	31.6
	>7 drinks/week	436	14.0	59	27.8	377	13.0
Marijuana use in past 6 months (%)		603	19.3	74	34.9	529	18.2
Illicit drug useb in past 6 months (%)		373	11.9	80	37.7	293	10.1

Missing values for these variables are excluded.

^a Exchanged sex for drugs, money, or shelter.

^b Illicit drug use includes any crack cocaine, cocaine, heroin, methamphetamine, injection drugs, or nonprescription narcotics.

IQR, interquartile range.