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Las DIFERENCIAS GEOGRÁFICAS EN TARIFAS de la OCURRENCIA del CÁNCER Y TARIFAS de FATALIDAD

según lo mencionado en otro informe del WHO, las sustancias carcinógenas se asocian fuertemente a la ocurrencia del cáncer. Esto es obvio de las variaciones substanciales en la incidencia del cáncer y los índices de mortalidad en varias localizaciones.

Tabla 15. Variaciones e incidencia geográficas de diversas formas de cáncer

For example, the results of a survey in 1992 conducted in Japan on the comparative death rate are as follows:

Provinces with higher death rates for carcinoma of the stomach:

Male Yamagata, Toyama, Akita
Female Toyama, Niigata

Provinces with lower death rates for carcinoma of the stomach:

Male Okinawa, Kagoshima
Female Okinawa Kagoshima

Provinces with higher death rates for cancer of the lung:

Male Osaka, Nara, Fukuoka, Nagasaki
Female Osaka, Kyoto, Hyogo, Fukuoka

Provinces with higher death rates of liver cancer:

Male Saga, Nagasaki, Fukuoka, Osaka
Female Saga, Miyazaki

Notwithstanding the variations in the occurrence rates of cancer among different races throughout the world, the significant variations in incidence rates in such a small country as Japan demonstrates the relationship between the occurrence of different forms of cancer and environmental differences. These include differences in ecological systems, living conditions, food, and other lifestyle variations. The carcinogenic substances have a particularly important relationship to the type of cancer found in a given area.

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