Table 1.

Sample characteristics stratified by seroconversion among young Black MSM who were confirmed as seronegative at baseline via laboratory analyses in Chicago, uConnect (N = 343 persons)

Characteristic	Total		Seronegative		Seroconverted1		p-value2
	No.	%	No.	%	No.	%
Total	343	100	310	90.4	33	9.6
Demographics, n(%)
Employment							0.250
Unemployed	159	46.4	140	45.2	19	57.6
< 30 hours/week	93	27.1	84	27.1	9	27.3
> 30 hours/week	91	26.5	86	27.7	5	15.1
Housing Instability3	85	24.8	78	25.2	7	21.2	0.611
Have health coverage	180	52.5	162	52.3	18	54.5	0.384
Current student	126	36.7	110	35.5	16	48.5	0.141
In a relationship	128	37.3	116	37.4	12	36.4	0.840
Risk behaviors,3 n(%)
Condomless sex	195	56.9	176	56.7	19	57.6	0.930
Group sex	57	16.8	49	16.0	8	24.2	0.226
Drug and alcohol use,3 n(%)
Marijuana use4							0.341
Never	102	29.7	91	29.4	11	33.3
Intermittent	141	41.1	125	40.3	16	48.5
Heavy	100	29.2	94	30.3	6	18.2
Other Substance Use3,5	60	17.5	52	16.8	8	24.2	0.283
Alcohol use							0.453
Never	47	13.7	41	13.2	6	18.2
≤ Once per day	217	63.3	195	62.9	22	66.7
At least once per day	79	23.0	74	23.9	5	15.2
Network degree measures, mean (range)
Total network	10.0	1–24	9.8	1–24	11.6	7–20	0.028
Recent HIV	0.6	0–13	0.4	0–11	2.2	0–13	<0.001
Long-term HIV	1.3	0–11	1.2	0–7	2.0	0–11	0.001
HIV-negative	9.45	1–24	9.44	1–24	9.64	4–18	0.799

¹Defined as HIV seropositive and HIV seronegative in a prior wave.

²Using chi-square analysis or T-test

³In the past 12 months

⁴Intermittent use is defined as less than and including weekly use; heavy use is defined as at least once per day.

⁵Includes the use of ecstasy/molly/E, poppers, cocaine/crack, heroin, psychedelics, methamphetamines, prescriptions.