Use the information create two $2$x$2$ tables:$$

One using data only for those with high medical severity$$

One using data only for those with low medical severity As a part of the study, the epidemiologists obtained information about the patients' other medical problems. The information was summarized into a score based on information about the patients' diseases when they were admitted to hospital. To create two groups, the researchers classified everyone who had a score of $5$ or more into the and everyone whose score was less than $5$ into the low medical severity group. high medical severity group$$

Using the data from their study, they were able to establish the following facts:$$

Of the $79$ people who had bedsores and died, $55$ had high medical severity and $24$ had low medical severity.$$

Of the $745$ people who had bedsores and did not die, $51$ had high medical severity and $694$ had low medical severity.$$

Of the $286$ people who had no bedsores and died, $5$ had high medical severity and $281$ had low medical severity.$$

Of the $8,290$ people who had no bedsores and did not die, $5$ had high medical severity and $8,285$ had low medical severity.