Assessment of respondent driven sampling for recruiting female sex workers in two Vietnamese cities: reaching the unseen sex worker.
Assessment of respondent driven sampling for recruiting female sex workers in two Vietnamese cities: reaching the unseen sex worker.
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DOI：
10.1007/s11524-006-9099-5
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发表时间：
2006-11
影响因子：
6.6
通讯作者：
Huong, Pham Thi
中科院分区：
文献类型：
--
作者：
Johnston, Lisa Grazina;Sabin, Keith;Hien, Mai Thu;Huong, Pham Thi
受访者驱动抽样（RDS）是一种相对较新的方法，难以接触的人群抽样。在这项研究之前，越南的女性性工作者（FSW）使用各种方法进行抽样，包括时间位置抽样（TLS），这可能无法访问更隐藏的FSW类型。本文提出了一种分析，从艾滋病病毒的生物和行为监测调查，以评估的可行性和有效性的RDS样本FSW，以确定如果RDS可以达到否则无法访问的FSW在越南和比较RDS的结果与理论TLS的艾滋病风险因素。通过面对面的访谈与FSW在胡志明市（胡志明市）和海丰（惠普），数据收集的场地，他们最经常招揽他们的客户。这些数据被用来创建三个变量，以评估FSW是否在可见，半可见和不可见的位置招揽客户。对于此分析，可见组模拟使用TLS捕获的样本。在三个FSW可见性组中的每一个组中，对HIV流行率和相关风险因素以及服务利用率的调查结果进行了比较，以评估TLS相对于RDS的潜在偏倚。在HCMC和HP中，自我报告的可见FSW（HCMC：n=311; HP：n=162）的数量远大于半可见（HCMC：n=65; HP：n=43）和不可见（HCMC：n=37; HP：n=10）FSW的数量。在这两个城市中，隐蔽的FSW与可见和半可见的FSW一样可能是HIV阳性（HCMC：可见14.5%，半可见13.8%，不可见13.5%，p值= 0.982; HP：可见的35.2%，半可见的30.2%，不可见的30.0%，p值= 0.801），以实践使他们处于感染和传播艾滋病毒风险的行为（注射吸毒-HCMC：可见13.8%，半可见12.3%，不可见5.4%，p值= 0.347; HP：可见38.9%，半可见23.3%，不可见30.0%，p值= 0.378，过去一个月未使用避孕套-仅HCMC：可见52.7%，半可见63.1%，不可见48.6%，p值= 0.249），并在过去一年中有性传播感染（STI）症状（HCMC：可见16.1%，半可见12.3%，不可见16.2%，p值= 0.742; HP：可见13.6%，半可见18.6%，不可见20.0%，p值= 0.640）。过去一个月未使用安全套的HP在可见、半可见和不可见组之间存在差异（可见53.1%，半可见79.1%，不可见60.0%，p值= 0.009）。这项研究发现，RDS是成功地招募隐藏类型的FSW在越南。越南过去的FSW报告评估了更明显的FSW是最脆弱和最容易感染艾滋病毒的。虽然可见性暗娼的数量远高于半可见性暗娼和非可见性暗娼，但本研究发现，非可见性暗娼非常容易感染HIV。如果预防方案针对的是那些最有可能被评估的人（例如，更明显的FSW类型），那么这项分析表明，很大一部分FSW人口可能没有得到最佳的艾滋病毒信息和服务。
Respondent driven sampling (RDS) is a relatively new method to sample hard-to-reach populations. Until this study, female sex workers (FSWs) in Vietnam were sampled using a variety of methods, including time location sampling (TLS), which may not access the more hidden types of FSWs. This paper presents an analysis from an HIV biological and behavioral surveillance survey to assess the feasibility and effectiveness of RDS to sample FSWs, to determine if RDS can reach otherwise inaccessible FSWs in Vietnam and to compare RDS findings of HIV risk factors with a theoretical TLS. Through face-to-face interviews with FSWs in Ho Chi Minh City (HCMC) and Hai Phong (HP), data were collected about the venues where they most often solicit their clients. These data were used to create three variables to assess whether FSWs solicit their clients in locations that are visible, semi-visible and non-visible. For this analysis, the visible group simulates a sample captured using TLS. Survey results in HIV prevalence and related risk factors and service utilization, adjusted for sampling methodology, were compared across each of the three FSW visibility groups to assess potential bias in TLS relative to RDS. The number of self-reported visible FSWs (HCMC: n=311; HP: n=162) was much larger than those of the semi-visible (HCMC: n=65; HP: n=43) and non-visible (HCMC: n=37; HP: n=10) FSWs in HCMC and HP. Non-visible FSWs in both cities were just as likely as visible and semi-visible FSWs to be HIV positive (HCMC: visible 14.5%, semi-visible 13.8%, non-visible 13.5%, p value = 0.982; HP: visible 35.2%, semi-visible 30.2%, non-visible 30.0%, p value = 0.801), to practice behaviors that put them at risk for contracting and transmitting HIV (injecting drug use—HCMC: visible 13.8%, semi-visible 12.3%, non-visible 5.4%, p value = 0.347; HP: visible 38.9%, semi-visible 23.3%, non-visible 30.0%, p value = 0.378, to have no condom use in the past month —HCMC only: visible 52.7%, semi-visible 63.1%, non-visible 48.6%, p value = 0.249) and to have symptoms of a sexually transmitted infection (STI) in the past year (HCMC: visible 16.1%, semi-visible 12.3%, non-visible 16.2%, p value = 0.742; HP: visible 13.6%, semi-visible 18.6%, non-visible 20.0%, p value = 0.640). There was a difference found among the visible, semi-visible and non-visible groups in HP for no past month condom use (visible 53.1%, semi-visible 79.1%, non-visible 60.0%, p value = 0.009). This study found that RDS was successful at recruiting hidden types of FSWs in Vietnam. Past reports of FSWs in Vietnam have assessed the more visible FSWs as being the most vulnerable and at risk for HIV. Although the number of visible FSWs is much higher than those of the semi and non-visible groups, this study found that the non-visible FSWs are very vulnerable to HIV infection. If prevention programs are targeting and responding to those who are most likely to be assessed (e.g., more visible types of FSWs) then this analysis indicates that a significant proportion of the FSW population at risk for HIV may not be receiving optimal HIV information and services.
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影响因子：
2.5
作者：
Heckathorn, DD;Jeffri, J
通讯作者：
Jeffri, J
DOI：
10.1111/j.0081-1750.2004.00152.x
发表时间：
2004-01-01
期刊：
SOCIOLOGICAL METHODOLOGY, 2004, VOL 34
影响因子：
--
作者：
Salganik, MJ;Heckathorn, DD
通讯作者：
Heckathorn, DD
影响因子：
3.3
作者：
Muhib, FB;Lin, LS;Smith, PJ
通讯作者：
Smith, PJ
影响因子：
4.4
作者：
Ramirez-Valles, J;Heckathorn, DD;Campbell, RT
通讯作者：
Campbell, RT
影响因子：
12.7
作者：
Stueve, A;O'Donnell, LN;Blome, J
通讯作者：
Blome, J