Clinical characteristics of HIV-infected men who have sex with men (MSM) who were born during 1984–1985, HIV-infected MSM born in or after 1986, HIV-negative MSM born in or after 1986, and HIV-negative heterosexuals born in or after 1986.

aComparison among the four groups.bComparison between Groups I and II.cComparison among the three groups born in or after 1986 (Groups II-IV).Abbreviations: anti-HBc, hepatitis B virus core antibody; HBV, hepatitis B virus; HBsAg, HBV surface antigen; HCV, hepatitis C virus; RPR, rapid plasma reagin; PVL, plasma HIV RNA load; SD, standard deviation.