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

Distribution of seropositioning and serosorting scores.

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

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

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

Temporal trends of HIV cases among men who have sex with men, San Francisco, 2004–2006.

<p>Temporal trends of HIV cases among men who have sex with men, San Francisco, 2004–2006.</p

Bivariate and multivariate risk analyses of HIV recent infection, acute infection and drug resistance, MSM testers, San Francisco, 2004–2006.

<p>OR = Odds Ratio.</p><p>AOR = Adjusted Odds Ratio.</p><p>CI = Confidence Intervals.</p><p>P = P-value.</p

Temporal trends of HIV cases, San Francisco, 2004–2006.

<p>Temporal trends of HIV cases, San Francisco, 2004–2006.</p

Distribution of HIV-1 drug-resistant cases by drug class, San Francisco, 2004–2006.

<p>NRTI = nucleoside reverse transcriptase inhibitors.</p><p>NNRTI = non-nucleoside reverse transcriptase inhibitors.</p><p>PI = protease inhibitors.</p

HIV infections stratified by demographic characteristics, risk exposure categories and predictors of risk, San Francisco, 2004–2006.

<p>Denominators:</p>1<p>HIV-Negative.</p>2<p>All HIV Infection.</p>3<p>All Testers.</p>4<p>Long-Term Infection.</p>5<p>Recent Infection.</p>6<p>Acute Infection.</p>7<p>Drug-Resistant Cases.</p