How to use χ2 test correctly——the analysis of common odds ratio for the data of a multiway table and the implementation of SAS software / 四川精神卫生

ABSTRACT

The purpose of this article was to introduce the odds ratio analysis method of g×2×2 table data and the calculation method based on SAS software. The contents included the following aspects： firstly， the homogeneity test of the odds ratio of the data in the g×2×2 table was performed； secondly， when the data met the homogeneity requirements， point estimation and confidence interval estimation for the common odds ratio based on the correction method were implemented； thirdly， when the data did not meet the homogeneity requirements， based on the approach of "the conditional distribution of the frequency in the （1，1） grid in each layer 2×2 table" ， these things， such as the point estimation and confident interval estimation as well as hypothesis testing about the common odds ratio， were accurately estimated and performed. All calculations were realized based on the FREQ procedure in SAS/STAT by means of two real examples. Furthermore， the output results of SAS software were explained， and the statistical and professional conclusions were made.