title: Estimation of human immunodeficiency virus (HIV) seroincidence among repeat anonymous testers in San Francisco.
abstract: The authors approximated human immunodeficiency virus (HIV) seroincidence in a population of men who have sex with men and who sought repeated anonymous HIV testing in San Francisco in 1995. The number of seroconversions and person-years of observation were estimated using the date and result of the current test and the self-reported date and result of the previous test. Estimates for HIV seroincidence (2.8 per 100 person-years, 95% confidence interval 2.3-3.4) and predictors of seroconversion were similar to those estimated from a prospective study of men who have sex with men conducted in San Francisco at the same time. While the limitations of self-reported data in a self-selected population are recognized, data from repeat testers may provide a practical surveillance tool.
authors.affiliation: AIDS Office, San Francisco Department of Public Health, CA 94102, USA.
authors.forename: W
authors.initials: W
authors.lastname: McFarland
authors.forename: T A
authors.initials: TA
authors.lastname: Kellogg
authors.forename: J
authors.initials: J
authors.lastname: Dilley
authors.forename: M H
authors.initials: MH
authors.lastname: Katz
mesh_terms: D000328:Adult; D001741:Black or African American; D044383:Black People; D016001:Confidence Intervals; D005240:Feasibility Studies; D006679:HIV Seropositivity / Q000175:diagnosis / Q000453:epidemiology*; D015528:HIV Seroprevalence; D006716:Homosexuality; D006801:Humans; D015994:Incidence; D008297:Male; D015999:Multivariate Analysis; D009566:Nitrates; D000439:Pentanols; D012307:Risk Factors; D012495:San Francisco / Q000453:epidemiology; D012725:Sexual Behavior; D019966:Substance-Related Disorders / Q000453:epidemiology
chemical_list: D009566:Nitrates; D000439:Pentanols; C036285:amyl nitrate