Hu Chunyan,Hu Liangping,How to use χ² test correctly—— χ² test for the data of four-fold tables collected from the case-control design[J].SICHUAN MENTAL HEALTH,2021,34(2):106-110

How to use χ² test correctly—— χ² test for the data of four-fold tables collected from the case-control design

DOI：10.11886/scjsws20210316002

English keywords:Case-control design χ² test Odds ratio Confidence interval SAS software R software

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Author Name	Affiliation	Postcode
Hu Chunyan	Graduate School， Academy of Military Sciences PLA China， Beijing 100850， China	100850
Hu Liangping	Graduate School， Academy of Military Sciences PLA China， Beijing 100850， China Specialty Committee of Clinical Scientific Research Statistics of World Federation of Chinese Medicine Societies， Beijing 100029， China	100029

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English abstract:

The purpose of this paper was to introduce the χ² test for the data of four-fold tables collected from the case-control design， the hypothesis test and interval estimation of odds ratio， and the implementation of SAS and R software. In view of the characteristics of case-control design， the concept of odds ratio， hypothesis testing and interval estimation were emphasized. It was given that the interpretation of the results calculated by SAS and R software， as well as the statistical conclusion and professional.

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