Characteristics, prevalence of longstanding and recent HIV infection, and associations with recent HIV infection among persons undergoing HIV testing at the San Francisco City Clinic from 2004–2007 (development data; n = 12622).

1Longstanding HIV prevalence: prevalence of longstanding infection over the entire study period (2004–2007) (note: recent and acute infections were excluded from the denominator).2Recent HIV prevalence: prevalence of recent infection over the entire study period (2004–2007) (note: acute and longstanding infections were excluded from the denominator).3Age, median (IQR): 32 yrs (26–39).4GLBQQ/Other group includes gay, lesbian, bisexual, queer, “don't know” (questioning), and “other”.5All risk behaviors occurring since time of last HIV test or within the past 2 years, whichever is shorter.6Sexually transmitted infection diagnosed since time of last HIV test or within the past 2 years, whichever is shorter.