title: Sexual partner's age as a risk factor for HIV seroconversion in a cohort of HIV-negative homosexual men in Sydney.
abstract: Increasing partner age may be an important risk factor for HIV infection in homosexual men. About 20 % of 1,427 participants in the Health in Men study in Sydney, Australia, reported that half or more of their partners were much older. Having more partners who were much older was associated with an increased risk of HIV seroconversion (p trend = 0.002), and this remained significant after adjustment for participants' age, number of regular and casual partners, and sexual risk behaviour (p trend = 0.027). Men who reported much older partners were at increased risk of HIV infection, independent of unprotected anal intercourse with sero-nonconcordant partners.
authors.affiliation: The Kirby Institute, University of New South Wales, CFI Building, Corner West and Boundary Streets, Darlinghurst, NSW, 2010, Australia. jjin@kirby.unsw.edu.au
authors.forename: Fengyi
authors.initials: F
authors.lastname: Jin
authors.forename: Andrew E
authors.initials: AE
authors.lastname: Grulich
authors.forename: Limin
authors.initials: L
authors.lastname: Mao
authors.forename: Iryna
authors.initials: I
authors.lastname: Zablotska
authors.forename: Matthew
authors.initials: M
authors.lastname: O'Dwyer
authors.forename: Mary
authors.initials: M
authors.lastname: Poynten
authors.forename: Garrett P
authors.initials: GP
authors.lastname: Prestage
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D015658:HIV Infections / Q000453:epidemiology* / Q000523:psychology / Q000635:transmission*; D018023:HIV Seronegativity; D006679:HIV Seropositivity / Q000453:epidemiology* / Q000523:psychology / Q000635:transmission*; D006306:Health Surveys; D018451:Homosexuality, Male / Q000523:psychology / Q000706:statistics & numerical data*; D006801:Humans; D015994:Incidence; D008297:Male; D008875:Middle Aged; D009517:New South Wales; D011446:Prospective Studies; D012307:Risk Factors; D012725:Sexual Behavior; D012747:Sexual Partners; D055815:Young Adult