Question

A group of researchers were interested in studying the use of aspiring and the incidence of kidney cancer. They designed their study and enrolled 13,987 white, affluent, and well-educated residents of a retirement community (9,621 women and 4,366 men).   3,490 men, and 6,021 women did not use aspirin upon enrollment. There were a total of 25 cases of kidney cancer that were reported after 6.5 years of follow up (15 among men, 10 among women). Among the males who developed kidney cancer, 9 used aspirin; of the females who developed kidney cancer, 4 used aspirin.

l

2. Complete a 2x2 table for males with aspirin use as the exposure, and kidney cancer as the outcome

	Outcome status – Kidney Cancer Present	Outcome status – Kidney Cancer Absent	Total
Exposure status – Aspirin Used (Present)	Click or tap here to enter text.	Click or tap here to enter text.	Click or tap here to enter text.
Exposure status - No Aspirin Used (Absent)	Click or tap here to enter text.	Click or tap here to enter text.	Click or tap here to enter text.
Total	Click or tap here to enter text.	Click or tap here to enter text.	Click or tap here to enter text.

3. What was the relative risk of kidney cancer associated with aspirin use among males (rounding to the nearest 100^th as you calculate)?

Place letter answer here:

3. 1. 0.2
   2. 5.0
   3. 6.0
   4. Odds ratio is the appropriate measure of association for this design
4. What is the best interpretation of the study results?

Place letter answer here:

1. The risk of aspirin use is 5.0 times higher among males who get kidney cancer, than males who do not.
2. The odds of kidney cancer among males who use aspirin is 6.0 times higher among those who use aspirin than among males who do not use aspirin.

Answer 1