Comparing Respondent-Driven Sampling and Targeted Sampling Methods of Recruiting Injection Drug Users in San Francisco
Comparing Respondent-Driven Sampling and Targeted Sampling Methods of Recruiting Injection Drug Users in San Francisco
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DOI：
10.1007/s11524-010-9486-9
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发表时间：
2010-09-01
影响因子：
6.6
通讯作者：
Raymond, H. Fisher
中科院分区：
文献类型：
--
作者：
Kral, Alex H.;Malekinejad, Mohsen;Raymond, H. Fisher
本文的目的是比较2005年旧金山两项独立研究招募的注射吸毒者的人口学特征、危险行为和服务利用情况，其中一项研究采用靶向抽样(TS)，另一项研究采用受访者驱动抽样(RDS)。吸毒者通过TS(n=651)和RDS(n=534)招募，并参与包括人口统计特征、危险行为和服务利用的定量访谈。通过抽样方法计算患病率估计值和95%可信区间(CI)，以评估这些变量是否存在差异。除非裔美国人外，所有人口学变量95%的CI有重叠(TS：45%，53%；RDS：29%，44%)。地图显示，在TS和RDS样本中，跨邮政编码分布的注射吸毒者的比例相似，只是在TS样本中更具代表性的是单个邮政编码。这个邮政编码包括一个与世隔绝的、以非裔美国人为主的社区，只有TS研究在那里有一个现场。TS和RDS样本的风险行为估计是相似的，尽管RDS样本中自我报告的丙型肝炎感染较低。在服务利用方面，在RDS样本中，更多的注射吸毒者报告最近没有使用药物治疗和注射器交换计划服务。我们的研究表明，混合抽样计划可能最适合在旧金山招募注射吸毒者，因此TS更密集的人种学和二次分析部分将有助于规划RDS的种子放置和田间位置。
The objective of this article is to compare demographic characteristics, risk behaviors, and service utilization among injection drug users (IDUs) recruited from two separate studies in San Francisco in 2005, one which used targeted sampling (TS) and the other which used respondent-driven sampling (RDS). IDUs were recruited using TS (n = 651) and RDS (n = 534) and participated in quantitative interviews that included demographic characteristics, risk behaviors, and service utilization. Prevalence estimates and 95% confidence intervals (CIs) were calculated to assess whether there were differences in these variables by sampling method. There was overlap in 95% CIs for all demographic variables except African American race (TS: 45%, 53%; RDS: 29%, 44%). Maps showed that the proportion of IDUs distributed across zip codes were similar for the TS and RDS sample, with the exception of a single zip code that was more represented in the TS sample. This zip code includes an isolated, predominantly African American neighborhood where only the TS study had a field site. Risk behavior estimates were similar for both TS and RDS samples, although self-reported hepatitis C infection was lower in the RDS sample. In terms of service utilization, more IDUs in the RDS sample reported no recent use of drug treatment and syringe exchange program services. Our study suggests that perhaps a hybrid sampling plan is best suited for recruiting IDUs in San Francisco, whereby the more intensive ethnographic and secondary analysis components of TS would aid in the planning of seed placement and field locations for RDS.