What is the difference between Division B and Division C?
As others have said, ideally Division C exams are more difficult - for Division B you should be able to define, describe and calculate, in Division C you should be able to discuss, explain and evaluate. Division C includes experimental error, stratified analysis, and descriptive and analytic statistics Division B does not.
Is cholera a foodborne illness?
- Yes, it can be. Check out https://www.cdc.gov/foodsafety/diseases/index.html
for a list of foodborne pathogens..
What to study.
I strongly suggest using the Principles of Epidemiology 3rd edition (https://www.cdc.gov/ophss/csels/dsepd/ss1978/ss1978.pdf
) as a source. Although a lot depends on who is writing the event, if you have really mastered the material in that book, you should do quite well in almost any competition.
The explanation for why one uses an odds ratio rather than relative risk for case control studies
was right on. Good job. You will sometimes see odds ratios used in cohort studies - it is easier to control for several different variables using an odds ratio rather than a relative risk. You will not see relative risk used for a case-control study. Can't be done that I know.
Good luck in the coming season. See you in Ohio.