Braunstein M S
Personalized Nursing Corporation, Plymouth, MI 48170.
AIDS Educ Prev. 1993 Summer;5(2):131-40.
As the spread of AIDS continues, there is an urgent need to understand patterns of drug use among drug users. While it is recognized that probability samples are scientifically preferable, there is a need to balance the realities of field research targeting an elusive population with the need for a sound sampling plan. A purposive or targeted sampling plan can increase the possibility of obtaining a representative sample of drug users. Targeted sampling involves using several sampling methods. First, neighborhoods with high concentrations of drug users are identified within the community in order to identify clusters of individuals in the target population. Once the geographic areas from which to sample have been identified, stratification can be used as an effective way to get a representative sample from neighborhoods with differing drug use patterns. The sampling plan can be further strengthened by the use of quota sampling to ensure that subgroups of drug users are adequately represented in the sample.
随着艾滋病的不断传播，迫切需要了解吸毒者的吸毒模式。虽然人们认识到概率样本在科学上更可取，但有必要在针对难以捉摸的人群进行实地研究的现实情况与制定合理抽样计划的需求之间取得平衡。目的抽样或目标抽样计划可以增加获得吸毒者代表性样本的可能性。目标抽样涉及使用多种抽样方法。首先，在社区内确定吸毒者高度集中的街区，以便识别目标人群中的个体集群。一旦确定了抽样的地理区域，分层抽样可作为从具有不同吸毒模式的街区获取代表性样本的有效方法。通过使用配额抽样可以进一步加强抽样计划，以确保吸毒者亚群体在样本中有充分的代表性。
