What was the prevalence of CHD at the initial exam per 1,000 persons? What was the incidence of CHD during the 5-year study per 1,000 persons?
What is the diarrhea attack rate in persons who ate both ice cream and pizza? What is the overall attack rate in persons who did not eat ice cream? 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 […]