Identify a disease has a high prevalence rate but a low incidence rate and a disease that has a high incidence rate but a low prevalance rate. What characteristic about these diseases creates this interrelationship? Homework Help

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Assignment #2
1) Define and describe the formulas for period prevalence rate and incidence rate. What do these rates tell an epidemiologist about a disease?

2) Identify a disease has a high prevalence rate but a low incidence rate and a disease that has a high incidence rate but a low prevalance rate. What characteristic about these diseases creates this interrelationship?

3) Define and give the formula for an odds ratio.

4) Complete the 2 x 2 table below and calculate the Odds Ratio: There were 120 total with lung cancer of which 20 were not exposed to tobacco smoke; 250 total without lung cancer of which 75 were exposed to tobacco smoke. Show your work.

Disease Status

Yes
No
Exposure Status
Yes

No

Odds Ratio =
5) Interpret the odds ratio / what does this finding mean?
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Required Course Textbook:

Friis, Robert H., and Thomas A. Sellers. (2014) Epidemiology for public health practice, 5th ed. Sudbury, MA: Jones and Bartlett Publishers.