A survey records all people currently living with hypertension in a district on 1 January. Which epidemiological measure is being estimated?
Correct answer: A. Point prevalence
- A. Point prevalence
- B. Cumulative incidence
- C. Attack rate
- D. Case-fatality rate
Explanation
Point prevalence is the proportion of a population with a condition at one specific point in time. Cumulative incidence counts new cases over a period, whereas an attack rate is usually used for an outbreak.
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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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