Hi. I performed Fisher's exact test in SPSS, on a sample of 141 diabetic patients who have diabetic foot and I wanted to explore if there is an association between smoking levels on the rows side (nonsmoker, smoker, exsmoker) and diabetic foot prognosis on the columns side (No amputation, Amputation). I had the data in a 3 by 2 table, and I got the results as shown in the image, and I wonder what does the value 1.791 on the left side adjacent to "Fisher's exact test" sentence represent? and and how is it calculated, and what is the difference between it and the term "The standardized statistic is -1.042."  in the notes below the table mean? and how is it calculated?                                                  

 Interestingly, on the same sample of 141 diabetic patients, when I wanted to explore the association between diabetes mellitus type on the rows side (type 1, type 2) and diabetic foot prognosis on the columns side (No amputation, Amputation), and I got the results as shown in the image, the cell adjacent to "Fisher's exact test" sentence on the left was empty, and what does the term "The standardized statistic is -0.339."  in the notes below the table mean? and how is it calculated? Any help would be appreciated

Hi Bahjat,

the value 1.791 is the test statistic, see, e.g., the related article on Wikipedia or in any introductory statistics textbook. The standardized statistic applies to the linear-by-linear association, which is probably not meaningful to interpret in your example as it applies to ordinal data while the variables in your table were apparently measured on the nominal level.

Kind regards

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Frank Furter
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