Kendall Carl, Kerr Ligia, Mota Rosa Salani, Guimarães Mark Drew Crosland, Leal Andrea Fachel, Merchan-Hamann Edgar, Dourado Inês Costa, Veras Maria Amélia, Brito Ana Maria de, Pontes Alexandre Kerr, Castro Ana Rita Coimbra Motta, Macena Raimunda Hermelinda Maia, Knauth Daniela, Linda Luana Costa, Oliveira Lisangela Cristina, Cavalcante Socorro, Camillo Ana Cláudia, Bermudez Ximena Pamela Diaz, Moreira Regina Célia, Benzaken Adele Schwartz, Pereira Gerson, Pascom Ana Roberta Pati, Pimenta Cristina, Grazina Johnston Lisa
Tulane University, Global Community Health and Behavioral Sciences - New Orleans (LA), United States.
Saúde Comunitária, Faculdade de Medicina, Universidade Federal do Ceará - Fortaleza (CE), Brazil.
Rev Bras Epidemiol. 2019 Mar 14;22:e190004. doi: 10.1590/1980-549720190004.
This paper details the methods used in the second national Biological and Behavioral Surveillance Survey (BBSS) of HIV, syphilis, and hepatitis B and C among men who have sex with men in Brazil.
Respondent-driven sampling (RDS) was used in 12 cities in 2016. The targeted sample size was initiated with five to six seeds in each city. HIV, syphilis, and Hepatitis B and C rapid tests were offered to participants. RDS Analyst with Gile's successive sampling (SS) estimator was used to adjust results as recommended and a weight for each individual was generated for further analysis. Data for the 12 cities were merged and analyzed using Stata 14.0 complex survey data tools with each city treated as its own stratum.
Duration of data collection varied from 5.9 to 17.6 weeks. 4,176 men were recruited in the 12 cities. Two sites failed to achieve targeted sample size due to a six-month delay in local IRB approval. No city failed to reach convergence in our major outcome variable (HIV).
The comprehensive BBSS was completed as planned and on budget. The description of methods here is more detailed than usual, due to new diagnostic tools and requirements of the new STROBE-RDS guidelines.
本文详细介绍了巴西第二次全国男男性行为者艾滋病毒、梅毒以及乙型和丙型肝炎生物和行为监测调查（BBSS）所采用的方法。
2016年在12个城市采用了应答驱动抽样（RDS）方法。每个城市以五到六个种子样本开始确定目标样本量。为参与者提供了艾滋病毒、梅毒以及乙型和丙型肝炎快速检测。按照建议，使用带有吉尔连续抽样（SS）估计器的RDS分析软件对结果进行调整，并为每个个体生成权重以进行进一步分析。使用Stata 14.0复杂调查数据工具对12个城市的数据进行合并和分析，每个城市视为一个独立的分层。
数据收集持续时间从5.9周到17.6周不等。12个城市共招募了4176名男性。由于当地机构审查委员会（IRB）批准延迟了六个月，有两个地点未能达到目标样本量。在我们的主要结果变量（艾滋病毒）方面，没有一个城市未能实现收敛。
全面的BBSS按计划完成且未超出预算。由于新的诊断工具和新的STROBE - RDS指南的要求，此处对方法的描述比以往更为详细。
