News and warnings
News

  The animated cancer maps for incidence have been updated to cover the years 1971-2015 from 28.06.2018.
  More cancer cases and new cancer groups are included in this NORDCAN version. New cases are found in ”Myeloproliferative diseases” and for Denmark also in ”Myelodysplastic syndromes”. Some diagnoses from “Other specified cancers” are relocated in ”Other malignant haematopoietic diseases”, a group constructed to be able to sum up the new groups together with lymphomas and leukaemias in ”Malignant haematopoietic Diseases”. The average yearly extra cases for the later years are for Denmark 726, Finland 42, Iceland 14, Norway 129 and Sweden 371.
  Cancer survival is now shown in ten 5-year periods from 1966-1970 to 2011-2015. We change periods with each new version to be able to present survival for the latest available 5-year time period of diagnosis. Tables showing the inclusions and exclusion from the survival calculations are added in the survival section of ”Online analysis”.
  Quality tables for incidence and for survival are now included.
  FAQ (frequently asked questions) is now included.

Warnings

  The population numbers for Faroe Islands and Greenland have erroneously been twice the actual size and incidence and mortality rates therefore half the actual size in version 8.0 (from 20.12.2017). This is corrected from 28.06.2018.
  Swedish deaths from ”Gallbladder” were misplaced in ”Liver” for the period 1971-1996 in version 7.3.
  Registrations of cancer cases in the two new groups ”Myelodysplastic syndromes” and ”Myeloproliferative diseases” start at different time points in the different countries and might there not be directly comparable the first years.
The Swedish cancer registry does not search for and perform follow-back in other registers for cancer cases identified from death certificates, as the other Nordic cancer registries do. This may lower Swedish incidence rates, especially for older ages and for cancers types with a high lethality, and thus result in too optimistic survival, since incident cases with short survival may not be included. Lung and pancreatic cancer are examples of cancer types where Swedish incidence rates are not directly comparable to rates from other Nordic countries and the use of mortality rates for comparisons are thus recommended. Excluding cases first identified via a cancer cause of death registration from the Danish cancer data 1999-2003 increased the 1-year relative survival by 1.5% points or less.

More detailed warnings can be found under Notes in “The NORDCAN database”.


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