Biostatistics & Research · single question
The number of EXISTING cases of a disease in a population at a single point in time is the:
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Correct answer: A. Prevalence
- A. Correct. Prevalence is the proportion of a population that HAS the disease at a given point in time (existing cases).
- B. Incidence measures NEW cases arising over a period of time.
- C. Positive predictive value is the probability of disease given a positive test.
- D. Negative predictive value is the probability of no disease given a negative test.
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