|
Prevalence
Prevalence indicators of the data bank were derived by an estimate procedure.
There is available data on prevalent cases, that is the number of people from a population, alive up to a given date, and who had previously been diagnosed cancer (no multiple cancers considered). New cases and still alive incident cases of previous years were included.
Prevalent proportion estimate are also available, showing the proportion of prevalent cases on a total resident population in a given area. This is function of incident and survival trends. The indicator is useful for health planning, resources allocation, and for the assessment of changes in cancer patients’ survival trends. It is usually expressed as a proportion per 100.000 people and it is calculated as follows:
x 100,000
where
P (s,sx,a,p,a) = estimated number of survivors who had been diagnosed cancer (only first and not multiple cancers are considered), specific per cancer site (s), sex (sx), national or regional geographical area (a), calendar year (p), 5-year-age class(a) from [0,4] a [80,84].
Pm (sx,a,p,a)= average population (Istat) specific per sex (sx), national or regional geographical area (a), calendar year (p), 5-year-age class (a) from [0,4] to [80,84].
Estimates on age-standardized prevalence proportion are also available, used to avoid possible confusion due to age structural differences while comparing prevalence proportions of more than one population.
It is calculated as a weighted average of specific age-class-prevalence proportions, where weights depend on the proportion of people of a standard population per each age-class
where
p (s,sx,a,p,a)= estimated prevalent proportion, per cancer site (s), sex (sx), national or regional geographical area (a), calendar year (p), age class(a).
p(a)*= sex(sx) and age class(a)-specific average standard population .
Standard populations available for calculations of corresponding standardized rates are: italian population in a given calendar year between 1970 and 1999, standard European population and standard World population.
|
|
|
  |
 |
To eat better for living better... Study of alimentary participation
for the prevention of the mammary cancer in young women
Read
>>
Short women course of kitchen for
patients in chemotherapy and study of adjuvant diet (StuDiA)
in order to prevent the weight increase and to improve the
quality of life during the adjuvant chemotherapy in the women
operated of breast cancer
Read
>>
The Ulisse Plan. Informative conferences for ill persons of
cancer, their friends and relatives
Read >>
White Book of the Italian Oncology AIOM. The data of the Italian Oncology, region for region Read >> |
|
|
 |
 |
|
