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Because the US
(California ) already codes stage of disease at diagnosis with SEER’s
(Surveillance, Epidemiology and End Results program) extent of disease (EOD)
coding scheme, to maximize between-country comparability on disease/stage
definitions it will be used to stage the samples of Canadian cancer cases.
We will also be able to explore analyses with other staging systems: TNM
(tumor-nodes-metastases) for both breast and colon cancer, and Dukes stages
and other subsite analyses (e.g., proximal vs. distal) for colon cancer.
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