In a population of 5,000 people, 100 ate spinach contaminated with E. coli (O157:H7) and became ill. Of the ill, 15 died. What was the case fatality rate? (A) 20 per 1,000 (B) 3 per 1,000 (C) 150 per 1,000 (D) 15 deaths

In a population of 5,000 people, 100 ate spinach contaminated with E. coli (O157:H7) and became ill. Of the ill, 15 died. What was the case fatality rate? (C) 150 per 1,000 The numerator for case fatality is “number of individuals dying during a specified period of time from the disease of interest” and the denominator is “number of persons with the disease of interest.” In this question, the numerator is 15 and the denominator is 100. 15/100 = 0.15 X 1000 = 150/1000 persons. References: Friis and Sellers; pp. 414-415 | Last et al.; p. 24 | Hebel and McCarter; p. 20 | Kleinbaum et al.; p. 63 More test answers on https://studyhippo.com/cph-study-guide-epi-questions/

12. The risk of acquiring a given disease during a time period is best determined by A. The case fatality rate (CFR) from that disease in the 0-4 age group B. A spot map that records all cases of the disease in the past year C. The prevalence for that disease during the past year D. The incidence rate for that disease in a given period of time E. The number of deaths due to that disease during a given year

The incidence rate for that disease in a given period of time More test answers on https://studyhippo.com/env-health-chap-2/

the risk of acquiring a given disease during a time period is best determined by: A:The case fatality rate (CFR) from that disease in the 0-4 age group B: A spot map that records all cases of the disease in the past year C: The prevalence for that disease during the past year D: The incidence rate for that disease in a given period of time E: The number of deaths due to that disease during a given year

D: the incidence rate for that disease in a given period of time More test answers on https://studyhippo.com/env-health-exam-1/

The number of persons dying of a disease divided by the number of persons who have the disease. More test answers on https://studyhippo.com/epidemiology-definitions/

Case Fatality Rate (CFR)

A mathematical quantity that describes the severity of a disease; usually applied to acute diseases. It is the proportion of persons diagnosed with a disease who actually die from the disease during the period of observation. More test answers on https://studyhippo.com/hosa-epidemiology/