Case fatality rate
Case Fatality Rate
The Case Fatality Rate (CFR) (pronounced: /keɪs fəˈtalɪti reɪt/) is a statistical measure used in epidemiology to determine the severity of a particular disease or health condition. It 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, then multiplying the result by 100 to get a percentage.
Etymology
The term "Case Fatality Rate" is derived from the English words "case" (from Latin casus, meaning "fall, chance"), "fatality" (from Latin fatalis, meaning "deadly, mortal") and "rate" (from Latin rata, meaning "fixed, settled"). It is used to describe the proportion of cases of a particular medical condition that result in death.
Calculation
The formula for calculating the Case Fatality Rate is:
CFR = (Number of deaths / Number of cases) * 100%
This formula provides a measure of the risk of death among those diagnosed with a certain disease or health condition.
Related Terms
- Mortality rate: A measure of the number of deaths in a given population.
- Incidence (epidemiology): The occurrence, rate, or frequency of a disease or health condition in a population.
- Prevalence: The proportion of a population who have a specific characteristic in a given time period.
- Epidemic: A widespread occurrence of an infectious disease in a community at a particular time.
- Pandemic: An epidemic of disease that has spread across a large region, for instance multiple continents, or worldwide.
See Also
External links
- Medical encyclopedia article on Case fatality rate
- Wikipedia's article - Case fatality rate
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