BACKGROUND: The present study was conducted to investigate the incidence of @entity1358 by sex, age group and different regions in Japan. METHODS: The survey was conducted from the beginning of January 1997 to the end of December 1997. A total of 1306 Institutions in all 47 prefectures throughout Japan were requested to register cases. RESULTS: There were 6358 @entity1 with @entity1358 , consisting of 4372 @entity1 and 1986 @entity1 . The age-specific incidence rates showed a peak in the age group of 65-70 years in both @entity1 and @entity1 . The crude incidence rates per 100 000 population for @entity1 and @entity1 were 7.1 and 3.1, respectively, and age-standardized incidence rates per 100 000 population for @entity1 and @entity1 were 4.9 and 1.8, respectively. The incidence rates in the Hokkaido region were significantly higher than in other regions (P < 0.05), among which there was no significant difference in incidence rates. CONCLUSIONS: The present study showed that the incidence rates of @entity1358 in Japan were approximately the same as among Japanese in Los Angeles. The rates were, however, lower than North American and European countries, but higher than China, Central or South American countries and African countries. The reasons for the high incidence of @entity703 in the Hokkaido region are not entirely clear. Further epidemiologic research is required.

The prevalence of XXXX : a nation-wide survey in Japan in 1997.

@entity1 :: ('9606', 'Species') :: ['women', 'persons', 'men'] @entity1358 :: ('MESH:D002292', 'Disease') :: ['renal cell carcinoma'] @entity703 :: ('MESH:D007680', 'Disease') :: ['renal cancer']
@entity1358 :: (MESH:D002292,Disease) :: ['renal cell carcinoma']
