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Int J Cancer. 2004 May 1;109(5):777-81.

Increasing colorectal cancer incidence rates in Japan.

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Department of Health Research and Policy, Stanford University School of Medicine, Stanford, CA, USA.


We examined trends of colorectal cancer incidence rates among Japanese (Miyagi Prefecture) and United States (US) whites (State of Connecticut) between 1959 and 1992. Age-standardized rates in Japan have increased dramatically and are now similar to US white rates. For both colon and rectum, age-specific rates in Japanese men born after 1930 exceed those in US whites, and the Japanese excess increases with year of birth. Similar patterns are evident for women. The current trends suggest that colorectal cancer will become a major source of morbidity and mortality in Japan, as these young Japanese age and their risks increase.

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