This information is collected routinely by cancer registries. It can be expressed pancreatic cancer uk survival rates an absolute number of cases per year or as a rate perpersons per year see age-specific rate and rate above.
The rate provides an approximation of the average risk of developing a cancer in a population for the time period of reference.
It can be expressed as an absolute number of deaths per year or as a rate perpersons per year.
The visualised statistics are: number of cases or deaths, crudeThe crude rate is the ratio of the number of new pancreatic cancer uk survival rates or deaths in a specified population and time period to the size of the population at risk during the same time period.
Incidence and mortality rate are usually presented as an annual rate perpersons at risk.
Comparison of rates referring to different time periods or different geographical areas is only possible after considering the differences in the age structure of the underlying populations. The age-standardisation allows the comparison of the rates that are arithmetically adjusted to have the same age structure of the standard population.
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Like the age-standardised rate, cumulative risk permits comparing between populations of different age structures. The visualised statistics are: number of cases or deaths, age-specific rateAn age-specific rate is the incidence or mortality rate pancreatic cancer uk survival rates a specified age group, in which the numerator and denominator refer to the same age group; it is expressed as the number of new cancer cases or deaths perpopulation at risk.
Several statistics can be displayed: numbers of cases or deaths, crude rateThe crude rate is the ratio of the number of new cases or deaths in a specified population and time period to the size of the population at risk during the same time period. The registries are ordered by decreasing value of the visualised statistic; if both incidenceIncidence is the number of new cases arising in a given period in a specified population.