National Board of Chiropractic Examiners (NBCE) Practice Test

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The number of new health-related cases of a disease divided by the total number in the population at risk is known as what rate?

Prevalence
Mortality
Incidence
Survival

The correct answer is: Prevalence

The correct answer is incidence. Incidence refers to the number of new cases of a disease that occur in a specified population during a defined period of time, typically expressed as a rate. It provides vital information on how frequently new cases of the disease arise in a population that is at risk, allowing health professionals and researchers to gauge the risk of developing the disease. Prevalence, on the other hand, measures the total number of existing cases of a disease at a particular point in time within a population, rather than just new cases. Mortality refers to the number of deaths in a population from a specific disease, often expressed as a rate. Survival rates measure the proportion of individuals who continue to live for a certain period following diagnosis or treatment of a disease. Each of these terms is crucial in epidemiology but serves a distinct purpose in understanding disease dynamics within populations.