科研之友
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摘要
Background: Serosorting, selecting sex partners of the same HIV status, may be associated with increased risk of sexually transmitted infection (STI). We examined the association between unprotected anal intercourse (UAI) with a seroconcordant partner and STIs among HIV-negative men who have sex with men (MSM) at an urban lesbian, gay, bisexual, and transgender STI clinic. %26lt;br%26gt;Methods: Subjects reported how they assessed their most recent sex partner%26apos;s HIV status. Those who reported getting tested together or asking were classified as known concordant; those who determined their partner%26apos;s serostatus based on appearance, age, or social aspects were classified as assumed concordant. Generalized estimating equations generated prevalence ratios for associations between seroconcordance and STIs. %26lt;br%26gt;Results: From May 2010 through October 2011, 961 HIV-negative MSM were screened for gonorrhea, chlamydia, and syphilis at 1110 visits. Sexually transmitted infection prevalence was 20.1%: 20.2% at visits with known seroconcordant UAI, 35.3% at visits with assumed seroconcordant UAI, 29.5% at visits where UAI with an unknown status partner was reported, 34.8% at visits with serodiscordant UAI, and 16.1% at visits with no reported UAI. Assumed serodiscordant UAI (adjusted prevalence ratio [aPR], 2.51; 95% confidence interval [CI], 1.79-3.51), unknown status partner (aPR, 1.76; 95% CI, 1.31-2.38), and serodiscordant UAI (aPR, 2.57; 95% CI, 1.76-3.75) were significant predictors of STI after controlling for age and race/ethnicity, STI history, alcohol use, substance use, and multiple sex partners. Known seroconcordant UAI was not associated with STI. %26lt;br%26gt;Conclusions: Assumed seroconcordant UAI was associated with increased STI prevalence, although known seroconcordant UAI was not. The risk associated with UAI with a partner of assumed seroconcordance should be emphasized for HIV-negative MSM.
- 出版日期2012-12
