title: Transfer of sampling methods for studies on most-at-risk populations (MARPs) in Brazil.
abstract: The objective of this paper was to describe the process of transferring two methods for sampling most-at-risk populations: respondent-driven sampling (RDS) and time-space sampling (TSS). The article describes steps in the process, the methods used in the 10 pilot studies, and lessons learned. The process was conducted in six steps, from a state-of-the-art seminar to a workshop on writing articles with the results of the pilot studies. The principal investigators reported difficulties in the fieldwork and data analysis, independently of the pilot sampling method. One of the most important results of the transfer process is that Brazil now has more than 100 researchers able to sample MARPs using RDS or TSS. The process also enabled the construction of baselines for MARPS, thus providing a broader understanding of the dynamics of HIV infection in the country and the use of evidence to plan the national response to the epidemic in these groups.
authors.affiliation: Departamento de DST, AIDS e Hepatites Virais, Ministério da Saúde, Brasília, Brasil. aristides@aids.gov.br
authors.forename: Aristides
authors.initials: A
authors.lastname: Barbosa Júnior
authors.forename: Ana Roberta Pati
authors.initials: AR
authors.lastname: Pascom
authors.forename: Célia Landmann
authors.initials: CL
authors.lastname: Szwarcwald
authors.forename: Carl
authors.initials: C
authors.lastname: Kendall
authors.forename: Willi
authors.initials: W
authors.lastname: McFarland
mesh_terms: D001938:Brazil / Q000453:epidemiology; D003625:Data Collection / Q000379:methods; D005260:Female; D015658:HIV Infections / Q000453:epidemiology*; D006801:Humans; D008297:Male; D010865:Pilot Projects; D018570:Risk Assessment; D012494:Sampling Studies; D035862:Vulnerable Populations