Why are there separate databases with Kaposi Sarcoma and Mesothelioma classified as individual cancer sites? What are the effects of having separate databases with these sites broken out?
Deaths caused by Kaposi Sarcoma and Mesothelioma were not classified as such until 2000, so the only data available for these sites is since that year. To provide risk estimates from earlier years, databases were provided with DevCan without these sites classified as separate sites. The effect of having Kaposi Sarcoma and Mesothelioma defined as their own sites is that cancers which would otherwise be classified as other sites (lung, for instance) are now not added to those totals.
Deaths caused by Kaposi Sarcoma and Mesothelioma were not classified as such until 2000, so the only data available for these sites is since that year. To provide risk estimates from earlier years, databases were provided with DevCan without these sites classified as separate sites. The effect of having Kaposi Sarcoma and Mesothelioma defined as their own sites is that cancers which would otherwise be classified as other sites (lung, for instance) are now not added to those totals. Therefore, the risk of developing or dying of lung cancer for a particular cohort, as determined from a database with Kaposi Sarcoma and Mesothelioma separated out, will be less than the risk calculated for the same cohort in a database without these sites separately listed. For more information, see SEER Site Recode ICD-O-3 (1/27/2003) Definition and SEER Cause of Death Recode 1969+ (9/17/2004).
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