Which epidemiological measure expresses the number of deaths in a population during a specified period?
Correct answer: A. Mortality rate
- A. Mortality rate
- B. Case-fatality rate
- C. Attack rate
- D. Survival rate
Explanation
Mortality rate relates deaths to the total population during a stated time. Case-fatality rate uses diagnosed cases as its denominator, so it measures the proportion of affected people who die.
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About Epidemiology and Biostatistics
Epidemiology examines the distribution and causes of disease by person, place and time, using measures such as incidence, prevalence, mortality and case-fatality rates. Biostatistics covers data presentation, sampling, averages, variability, probability and interpretation of study results, while distinguishing association from causation.
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