时间/空间定位抽样设计及其在性病门诊病人调查中的应用

Time/Space Location Sampling and its Application in Survey of Outpatients Visiting Sexually Transmitted Diseases Clinic

目的 探讨时间 /空间定位抽样方法在性病门诊抽样调查中的应用。方法 该抽样设计的基础是两级抽样 ,首先构建一个初级抽样单位 (PSU )框架 ,此框架由流动人群发生的时间和地点组成。PSU用“按估计容量比例的概率抽样”法抽取。确定PSU的样本后 ,再在每个抽中的PSU中采用系统或简单随机抽样法抽取固定数目的就诊者组成样本。结果 以在济南市某性病诊所的抽样实例说明此方法在门诊性病患者调查中的应用。结论 该设计弥补了其他抽样方法的不足 ,值得在性病门诊病人调查中推广应用。

Objective To explore the application of time/space sampling designs in survey of outpatients visiting sexually transmitted diseases clinic.Methods The essence of such designs involves first constructing a sampling frame of primary sample units (PSU) that consist of time period/location combinations during which and where the flow takes place. A sample of PSUs is drawn by probability proportional to estimated size sampling and a fixed size sample of visitors is then selected, often by systematic sampling or simple random sampling, in selected PSUs. Results A practical example in a sexually transmitted diseases clinic of Jinan was presentation to illustrate the use of this method.Conclusion The time/space sampling designs can remedy the shortage of systematic sampling or simple random sampling designs, and worthy of application widely in survey of outpatients visiting sexually transmitted diseases clinic.