A test correctly identifies 180 of 200 people without the disease. What is its specificity?
Answer and explanation
Correct answer: A. 90%
- Step 1: Specificity is 180 divided by 200, which is 90%. Answer: 90%. Why not the others: 10%, 80% and 20% don't fit.
Practise more Public health and epidemiology.
Free questions with an explanation for every one, and full timed ENAM Practice (Peru National Medical Examination) mock tests.
More Public health and epidemiology questions
- A screening test detects 90 of 100 people who have a disease. What is its sensitivity?
- Which measure describes the number of new cases of a disease during a period?
- Which study design is best to estimate the incidence of a disease in a cohort?
- In a case-control study, which measure of association is calculated?
- Vaccination of a population is an example of which level of prevention?
- Which is an example of secondary prevention?