Which statement differentiates mortality rate from morbidity rate?

• A. Mortality rate measures deaths in a population over a period; morbidity rate measures the occurrence of disease or illness in a population
• B. Mortality rate measures the occurrence of disease in a population; morbidity rate measures deaths
• C. Mortality rate measures the average age at death; morbidity rate measures life expectancy
• D. Mortality rate measures hospitalizations; morbidity rate measures disability

Answer: (A)

The idea being tested is how death-related measures differ from illness-related measures in a population. Mortality rate refers to the number of deaths in a population over a specified time period, indicating how many people are dying. Morbidity rate, on the other hand, reflects the occurrence of disease or illness in the population, showing how common the disease or health condition is. This can be framed as incidence (new cases) or prevalence (existing cases) of illness, giving a sense of disease burden on the community and health services.

So the statement that mortality rate measures deaths in a population over a period, while morbidity rate measures the occurrence of disease or illness in a population, is the best fit. The other options mix up these concepts or point to related measures (like age-at-death or hospitalizations/disability) that are not the standard definitions of mortality and morbidity rates.