Descriptive Epidemiologic Studies on Geographical Clusterings of Pancreatic Cancer Mortality and Incidence-An Analysis in Japan and Niigata-

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  • SEINO Takayuki
    Department of Community Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences
  • NAKADAIRA Hiroto
    Faculty of Nursing, Social Welfare, & Psychology Department of Nursing, Niigata Seiryo University
  • ENDOH Kazuo
    Department of Health & Nutrition, School of Medical Technology, Niigata University of Health & Welfare
  • YAMAMOTO Masaharu
    Department of Community Preventive Medicine, Niigata University Graduate School of Medical and Dental Sciences

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Other Title
  • 膵臓がん死亡及び罹患の地域集積性に関する記述疫学的研究―日本及び新潟県における分析―
  • スイゾウ ガン シボウ オヨビリカン ノ チイキ シュウセキセイ ニ カンスル キジュツエキガクテキ ケンキュウ ニホン オヨビ ニイガタケン ニ オケル ブンセキ
  • An Analysis in Japan and Niigata
  • 日本及び新潟県における分析

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Abstract

Objectives: The objectives of this study were to determine the mortality for pancreatic cancer in the 47 prefectures of Japan and to reveal the geographical distribution of the mortality and incidence for pancreatic cancer in Niigata.<br>Methods: Standardized mortality ratio (SMR) for pancreatic cancer in the 47 prefectures from 1998 to 2002 was calculated on the basis of the census and vital statistics of Japan. The same SMR in the 36 cities and counties in Niigata from 1995 to 2002 was calculated. These SMRs were compared with that of the national population. Then, standardized incidence ratio (SIR) for pancreatic cancer in the 36 cities and counties in Niigata from 1995 to 2002 was calculated on the basis of the Niigata Cancer Registry, compared with that of the general population of Niigata.<br>Results: The SMRs for pancreatic cancer for both sexes in Hokkaido, Aomori, Akita, Miyagi and Shimane were significantly higher than that of the national population (p<0.05). The SMR for males in Niigata was significantly high, whereas that for females was near the SMR of the national population. Among the 36 cities and counties in Niigata, significantly high SMRs for both sexes were observed only in Higashikanbara county; the SMRs [95% confidence interval (CI)] were 158.4 (104.4-230.5) and 172.2 (114.4-248.9) for males and females, respectively.<br>Conclusions: Significantly high SMRs for pancreatic cancer were observed in Hokkaido and most of the Tohoku region. A geographical clustering of pancreatic cancer in Higashikanbara county was found. Further studies are needed to clarify the determinants of the clustering.

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