This question follows-up on the post: What is the difference between McNemar’s test and the chi-squared test, and how do you know when to use each?
I am examining a pre- and post- intervention data on two disease conditions. The above post described the use of McNemar’s test for 1 disease before and after an intervention was administered to a sample.
I have two contingency tables, which look like:
**Disease A** After |no |yes| Before|No |41 |11 | |Yes |32 |39 | **Disease B** After |no |yes| Before|No |41 |11 | |Yes |32 |39 |
Question: I would like to compare the proportions of:
(1) Those that went from “Yes” to “No” pre to post for Disease A vs. Disease B
(2) Those that are “Yes” after treatment (“After Yes”/”Total N”) vs. those that are “No” after treatment for Disease A vs. Disease B.
How do I compare the two proportions in the above two questions ?
Again, the data is drawn from the same sample and anyone with Disease A could also be positive for Disease B at the same time. The same intervention is used to treat both A and B.