Demographic characteristics and risk behaviors reported at the baseline visit.

†<p>Serosorting Cohort compared to the entire EXPLORE Cohort.</p>‡<p>Seropositioning Cohort compared to the entire EXPLORE Cohort.</p

Comparison between serosorters (score> = 4) and non-serosorters (score< = 1) at baseline visit within the EXPLORE serosorting subcohort (n = 2623).

<p>Comparison between serosorters (score> = 4) and non-serosorters (score< = 1) at baseline visit within the EXPLORE serosorting subcohort (n = 2623).</p

Distribution of seropositioning and serosorting scores.

<p>Distribution of seropositioning and serosorting scores.</p

Predictors of HIV seroconversion in the EXPLORE serosorting subcohort.

<p>Adjusted for race, number male partners, self-reported gonorrhea, depression, alcohol or drug use before sex, amphetamine use.</p

Predictors of HIV seroconversion in the EXPLORE seropositioning subcohort.

<p>Adjusted for race, number male partners, self-reported gonorrhea, depression, alcohol or drug use before sex, amphetamine use.</p

Reasons for discontinuing PrEP across three PrEP delivery programs in San Francisco.

<p>Reasons for discontinuing PrEP across three PrEP delivery programs in San Francisco.</p

Adjusted relative hazards ratio of HIV seroconversion among Black MSM in HPTN 061.

<p>¹Adjusted for age, number of sexual partners, and any methamphetamine, cocaine and amyl nitrite use in the last six months, stratified by city. CAS-condomless anal sex; SC-Seroconversion</p><p>Adjusted relative hazards ratio of HIV seroconversion among Black MSM in HPTN 061.</p

PrEP uptake and follow-up in three PrEP delivery programs in San Francisco.

<p>Data through September 2013.</p>a<p>Includes medical and behavioral eligibility and program eligibility based on health insurance coverage.</p

Multinomial logistic regression of covariates with sexual behavior (includes all visits)¹.

<p>¹controlled by city; CAS-condomless anal sex</p><p>Multinomial logistic regression of covariates with sexual behavior (includes all visits)<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0118281#t002fn001" target="_blank">¹</a>.</p

Demographic and behavioral characteristics of HPTN 061 participants by seroprotective behavior at baseline.

<p>¹ Participants who are HIV negative, biological male and reported seroprotective behaviors at baseline are included in the table. Data on behavioral characteristics at baseline missing for 34 participants (total cohort N = 1144). CAS—Condomless anal sex</p><p>Demographic and behavioral characteristics of HPTN 061 participants by seroprotective behavior at baseline.</p