title: Incidence of HIV Infection in Young Gay, Bisexual, and Other YMSM: The P18 Cohort Study.
abstract: BACKGROUND
  HIV infections continue to rise in a new generation of young gay, bisexual, and other young men who have sex with men (YMSM) despite 3 decades of HIV prevention and recent biomedical technologies to deter infection.
  
  
  OBJECTIVE
  To examine the incidence of HIV and the demographic, behavioral, and structural factors associated with incident infections.
  
  
  METHODS
  A prospective cohort study.
  
  
  METHODS
  Six hundred YMSM who were aged 18-19 years at baseline.
  
  
  RESULTS
  At baseline, 6 prevalent cases of HIV were detected. Over the course of 36 months and 6 additional waves of data collection, we identified 43 (7.2%) incident cases of HIV. Incident infections were marginally higher among those residing in neighborhoods with higher rates of HIV prevalence. Using Cox proportional hazards models, we detected that hazard ratios (HRs) for time to HIV seroconversion were significantly higher for black YMSM (HR = 7.46) and mixed/other race YMSM (HR = 7.99), and older age at sexual debut with another man was associated with a lower risk of HIV seroconversion (HR = 0.50), whereas low perceived familial socioeconomic status was marginally associated with an increased risk for HIV seroconversion (HR = 2.45).
  
  
  CONCLUSIONS
  These findings support the disparities for HIV that exist within the population of sexual minority men and suggest that we attend to behavioral, structural, and social conditions to effectively tailor HIV prevention for a new generation of YMSM with keen eyes to the conditions faced by racial and ethnic minority YMSM, which heightened their risk for acquiring HIV.
authors.affiliation: Center for Health, Identity, Behavior and Prevention Studies, The Steinhardt School of Culture, Education, and Human Development, New York University, New York, NY.
authors.forename: Perry
authors.initials: P
authors.lastname: Halkitis
authors.forename: Farzana
authors.initials: F
authors.lastname: Kapadia
authors.forename: Danielle
authors.initials: D
authors.lastname: Ompad
mesh_terms: D000293:Adolescent; D001727:Bisexuality; D015331:Cohort Studies; D015658:HIV Infections / Q000453:epidemiology*; D006679:HIV Seropositivity / Q000453:epidemiology*; D018451:Homosexuality, Male; D006801:Humans; D008297:Male; D012307:Risk Factors; D012959:Socioeconomic Factors; D014481:United States; D055815:Young Adult