Lab: The Occurrence of Disease
1. What is the diarrhea attack rate in persons who ate both ice cream and pizza?
2. What is the overall attack rate in persons who did not eat ice cream?
3. Which of the food items (or combination of items) is most likely to be the infective item(s)?
A. Pizza only
B. Ice cream only
C. Neither pizza nor ice cream
D. Both pizza and ice cream
E. Cannot be assumed from the data shown
A prevalence survey conducted from January 1 through December 31, 2003 identified 580 new cases of tuberculosis in a city of 2 million persons. The incidence rate of tuberculosis in this population has historically been 1 per 4,000 persons each year.
4. What is the incident rate of tuberculosis per 100,000 persons in 2003?
5. Has the risk of tuberculosis increased or decreased during 2003?
6. What was the prevalence of CHD at the initial exam per 1,000 persons?
7. What was the incidence of CHD during the 5-year study per 1,000 persons?
