ENAM Practice (Peru National Medical Examination) · Paediatrics, Obstetrics and Public Health

Public health and epidemiology

15 practice questions, each with the answer and an explanation.

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Random questions from this topic, one at a time. You see the answer and the explanation straight after each one.

All 15 questions

  1. A screening test detects 90 of 100 people who have a disease. What is its sensitivity?
  2. A test correctly identifies 180 of 200 people without the disease. What is its specificity?
  3. Which measure describes the number of new cases of a disease during a period?
  4. Which study design is best to estimate the incidence of a disease in a cohort?
  5. In a case-control study, which measure of association is calculated?
  6. Vaccination of a population is an example of which level of prevention?
  7. Which is an example of secondary prevention?
  8. The maternal mortality ratio is expressed per how many live births?
  9. The infant mortality rate is expressed per how many live births?
  10. In Peru, which public insurance scheme mainly covers people living in poverty?
  11. In Peru, EsSalud mainly covers which group?
  12. A new treatment reduces the risk of an event from 20% to 15%. What is the absolute risk reduction?
  13. A new treatment reduces the risk of an event from 20% to 15%. What is the number needed to treat?
  14. Which mosquito transmits dengue in the Peruvian jungle and coast?
  15. A cohort of 1,000 smokers has 30 cases of disease and 1,000 non-smokers has 10 cases. What is the relative risk?

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