title: Systematic review of HIV prevalence studies among key populations in Latin America and the Caribbean.
abstract: OBJECTIVE
  This systematic review aims to synthesize articles, abstracts and reports of HIV prevalence studies conducted among men who have sex with men (MSM) and female sex workers (FSW) in Latin America and the Caribbean (LAC).
  
  
  METHODS
  Authors searched online databases and collected gray literature on HIV prevalence among MSM and FSW from LAC. Year, location, sampling methodology, study design, sample size, HIV prevalence and confidence intervals were abstracted.
  
  
  RESULTS
  A total of 73 studies, dating from 1986 to 2010 were included.The median prevalences for MSM and FSW were 10.6% (interquartile range: 7.4- 17.4) and 2.6% (IQR: 0.6 -4.2), respectively. Variability was high, especially for MSM. The majority of studies recruited participants using convenience methods.
  
  
  CONCLUSIONS
  HIV prevalence among MSM was higher than that among FSW. Sampling techniques should be standardized for future studies, prioritizing probability methods.
authors.affiliation: Universidad del Valle de Guatemala, Guatemala. meihackmiller@gmail.com
authors.forename: William Meihack
authors.initials: WM
authors.lastname: Miller
authors.forename: Lindsay
authors.initials: L
authors.lastname: Buckingham
authors.forename: Mario Salvador
authors.initials: MS
authors.lastname: Sánchez-Domínguez
authors.forename: Sonia
authors.initials: S
authors.lastname: Morales-Miranda
authors.forename: Gabriela
authors.initials: G
authors.lastname: Paz-Bailey
mesh_terms: D017691:Caribbean Region / Q000453:epidemiology; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D007843:Latin America / Q000453:epidemiology; D015995:Prevalence