The mortality rate – often confused with the<unk>  – is a measure of the relative number of deaths (either in general, or due to a specific cause) within the entire population per unit of time. A<unk> , in contrast, is the number of deaths among the number of diagnosed<unk> s only, regardless of time or total population. From a mathematical point of view, by taking values between 0 and 1 or 0% and 100%,<unk> s are actually a measure of risk <unk><unk>  risk) – that is, they are a proportion of incidence, although they don't reflect a disease's incidence. They are neither rates, incidence rates, nor ratios (none of which are limited to the range 0–1). They do not take into account time from disease onset to death. Sometimes the term<unk> o is used interchangeably with<unk> , but they are not the same. A<unk> o is a comparison between two different<unk> s, expressed as a ratio. It is used to compare the severity of different diseases or to assess the impact of interventions. Because the<unk>  is not an incidence rate by not measuring frequency, some authors note that a more appropriate term is<unk><unk>  proportion.
Case fatality rate
Mortality rate
Risk of mortality
Infection rate
Apparent infection rate
Epidemic curve
Survival rate
Risk factor