Question on Odds ratio


I have a basic understanding of odds ratio. I can't figure out how to integrate the space S into my odds ratio equation.

For the following figure:
S has 23000 genes, (all genes)
A has 751 genes and (condition1)
B has 375 genes (condition2)

How do I calculate the OR for A ∩ B?



Less is more. Stay pure. Stay poor.
I did not follow your example/problem at all. If possible please rephrase it or provide more information.

I would start by trying to put your data into a classification table (AKA, confusion matrix).