Table 2.

shows the characteristics of the YBMSM in our analytic sample (N=268).

Characteristics	Percent
Prevention and sex behaviors
Received HIV care (prevention or treatment) from provider	68.3
Tested for HIV or STIs at least 3 times in the last 9 months	83.6
Heard of PrEP	77.2
Condomless sex	59.3
Sex drug use	35.1
Group sex	17.2
Sociodemographic, behavioral and structural factors (controls)
Mean Age	23.47 (2.90; 17, 29)
Sexual orientation (bisexual)	26.1
HIV status (HIV+)	41.4
Health insurance coverage	77.2
Housing instability (in last 12 months)	20.5
Criminal justice involvement (ever)	11.9
Member of a ball house or gay family	31.3
Recreational marijuana use (daily or more)	29.5
Confidant ego-network features
Mean number of confidants	2.21 (1.11; 0, 5)
At least one confidant who is MSM	45.5
At least one confidant who knows respondent is MSM	39.9
At least one confidant who is biological / play family	10.1
Sexual ego-network features
Mean number of partners in past 6 months	2.72 (1.58; 0, 6)
At least one partner who is HIV+	24.6
At least one partner met through mutual friends	47.8
At least one partner met at bars, clubs, or ball events	14.9
At least one partner met in public spaces	20.2
At least one partner met online	46.3
Facebook network features
Number of Facebook friends	44.65 (27.60; 0, 162)
Number of Facebook group affiliations	11.00 (14.01; 1, 89)
At least one LGBTQ identity Facebook group	56.4
At least one Sexual Attraction Facebook group	51.5
At least one Chat Facebook group	60.5
At least one Secret Facebook group	73.7
Mean range of subjects among Facebook groups	3.95 (2.19; 1, 9)

Note: Numbers in parentheses are estimated standard deviation, minimum, maximum