Case-fatality rate
Case-fatality rate
The Case-fatality rate (pronounced: kās-fa-tal-i-tee rāt), also known as the case fatality risk or case fatality ratio, is a measure of the severity of a particular disease by defining the proportion of reported cases of a specified disease or condition which are fatal within a specified time.
Etymology
The term "case-fatality rate" is derived from the Latin words "casus" meaning "fall" and "fatalis" meaning "deadly or fatal". The term "rate" is derived from the Latin word "rata" meaning "fixed, settled".
Definition
The Case-fatality rate is calculated by dividing the number of deaths from a specified disease over a defined period of time by the number of individuals diagnosed with the disease during that time; the resulting ratio is then multiplied by 100 to yield a percentage. The case-fatality rate reflects the severity of the disease and the effectiveness of treatment protocols.
Related Terms
- Mortality rate: A measure of the number of deaths in a given population, location or other grouping of interest.
- Incidence (epidemiology): The occurrence, rate, or frequency of a disease or other health-related event or condition in a population.
- Prevalence: The proportion of a particular population found to be affected by a medical condition.
- Epidemiology: The study and analysis of the distribution, patterns and determinants of health and disease conditions in defined populations.
See Also
External links
- Medical encyclopedia article on Case-fatality rate
- Wikipedia's article - Case-fatality rate
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