Evaluation of the role of location and distance in recruitment in respondent-driven sampling.
Evaluation of the role of location and distance in recruitment in respondent-driven sampling.
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DOI：
10.1186/1476-072x-10-56
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发表时间：
2011-10-18
影响因子：
4.9
通讯作者：
White RG
中科院分区：
文献类型：
--
作者：
McCreesh N;Johnston LG;Copas A;Sonnenberg P;Seeley J;Hayes RJ;Frost SD;White RG
响应者驱动抽样（RDS）是一种越来越广泛使用的链接追踪设计的变体，用于招募隐藏人群。尚未对RDS中目标人群的空间分布的作用进行强有力的研究。我们研究的招聘模式的位置，以及他们如何可能有偏见的RDS研究结果。总人口数据的一系列特征的人口2402男性户主从一个开放队列的25个村庄在乌干达农村。住户的位置是事先知道的。在这一人群中进行了RDS调查，采用目前的RDS抽样方法和统计推断。按地点划分的人群几乎没有异质性。数据表明，更远的接触者不太可能被报告，因此招募，但如果报告更远的接触者，招募更近的接触者的可能性一样大。没有证据表明，更接近村庄会议地点与被招募的可能性有关，但它与招募更多新兵的可能性较高有关。住在面试地点附近的人更有可能被招募。家庭所在地影响了招募的总体概率，以及特定招募者的招募概率。在这项研究中，招聘模式似乎没有很大的偏见。观察到的模式可能会导致偏见，在更多的地理异质性人群。在RDS研究中，在选择网络规模问题和访谈地点时需要谨慎。
Respondent-driven sampling(RDS) is an increasingly widely used variant of a link tracing design for recruiting hidden populations. The role of the spatial distribution of the target population has not been robustly examined for RDS. We examine patterns of recruitment by location, and how they may have biased an RDS study findings. Total-population data were available on a range of characteristics on a population of 2402 male household-heads from an open cohort of 25 villages in rural Uganda. The locations of households were known a-priori. An RDS survey was carried out in this population, employing current RDS methods of sampling and statistical inference. There was little heterogeneity in the population by location. Data suggested more distant contacts were less likely to be reported, and therefore recruited, but if reported more distant contacts were as likely as closer contacts to be recruited. There was no evidence that closer proximity to a village meeting place was associated with probability of being recruited, however it was associated with a higher probability of recruiting a larger number of recruits. People living closer to an interview site were more likely to be recruited. Household location affected the overall probability of recruitment, and the probability of recruitment by a specific recruiter. Patterns of recruitment do not appear to have greatly biased estimates in this study. The observed patterns could result in bias in more geographically heterogeneous populations. Care is required in RDS studies when choosing the network size question and interview site location(s).