Hello.
I did chi square test on data of 60 patients having COVID 19.
The variable in the rows is the severity of case (mild, moderate, severe)
while the variable in the columns is lymphocytes count (normal, lymphopenia).
I found a significant diference and I liked to do a post hoc test using Bonferroni correction
and it is known that we should divide the alpha level 0.05 on the number of pairwise comparisons
and here I got confused about how to calculate the number of pairwise comparisons because I searched online
and found two different ways to calculate the number of pairwise comparisons:
First way, I have three pairwise comparisons coming from comarison of severity categories (mild to moderate), (mild to severe) and (moderate to severe).
Second way, I have six pairwise comparions that come from multiplying number of rows by number of columns i.e. 3 by 2 equaling 6.
So, which way should I use and why?
Thanks in advance
I did chi square test on data of 60 patients having COVID 19.
The variable in the rows is the severity of case (mild, moderate, severe)
while the variable in the columns is lymphocytes count (normal, lymphopenia).
I found a significant diference and I liked to do a post hoc test using Bonferroni correction
and it is known that we should divide the alpha level 0.05 on the number of pairwise comparisons
and here I got confused about how to calculate the number of pairwise comparisons because I searched online
and found two different ways to calculate the number of pairwise comparisons:
First way, I have three pairwise comparisons coming from comarison of severity categories (mild to moderate), (mild to severe) and (moderate to severe).
Second way, I have six pairwise comparions that come from multiplying number of rows by number of columns i.e. 3 by 2 equaling 6.
So, which way should I use and why?
Thanks in advance
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