| 胡纯严,胡良平.如何正确运用χ2检验——人-时间资料独立性检验与SAS实现[J].四川精神卫生杂志,2021,34(4):318-321.Hu Chunyan,Hu Liangping,How to use χ2 test correctly——the independence test for the data of the person-time[J].SICHUAN MENTAL HEALTH,2021,34(4):318-321 |
| 如何正确运用χ2检验——人-时间资料独立性检验与SAS实现 |
| How to use χ2 test correctly——the independence test for the data of the person-time |
| 投稿时间：2021-07-09 |
| DOI：10.11886/scjsws20210719003 |
| 中文关键词: 分层因素 人-时间 发病率 发病密度 独立性检验 |
| 英文关键词:Stratification factors Person-time Incidence rate Incidence density Independence test |
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| 中文摘要: |
| 本文目的是介绍“未分层人-时间资料”和“分层人-时间资料”的独立性检验与SAS实现方法。在“人-时间资料”中，处理因素各水平组中的样本含量都以“人-年数”来表达。进而，需采用“发病密度”取代通常定性资料分析中的“发病率”。本文详细介绍“未分层人-时间资料”和“分层人-时间资料”的“发病密度”比较的具体方法，并通过两个实例，展示使用SAS软件实现计算的全过程，包括SAS程序代码、SAS输出结果、结果解释和结论陈述。 |
| 英文摘要: |
| The purpose of this paper was to introduce the independence test and the SAS implementation for the "unstratified person-time data" and the "stratified person-time data". In "person-time data"， the sample size in each level of the treatment factor was expressed as "person-years". Furthermore， it was necessary to use the "incidence density" to replace the "incidence rate" in the usual qualitative data analysis. The paper introduced the concrete approaches of comparing the "incidence density" of the "unstratified person-time data" and the "stratified person-time data" in detail， and demonstrated the whole process of using SAS software to realize the calculation through two examples， including the SAS program code， the SAS output results， the results explanation and the conclusion statement. |
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