A screening test is used for tuberculosis in a group of people without symptoms. Which characteristic is most important when the aim is to identify nearly all people who may have the disease?
Correct answer: A. High sensitivity
- A. High sensitivity
- B. High specificity
- C. High positive predictive value
- D. Low negative predictive value
Explanation
High sensitivity detects a large proportion of people who truly have the disease and produces few false-negative results. Specificity is more important when the priority is to exclude people who do not have the disease.
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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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