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1989 Fiscal Year Final Research Report Summary

A study of cancer incidence and age at immigration among Japanese and whites in the United States

Research Project

Project/Area Number 01042001
Research Category

Grant-in-Aid for international Scientific Research

Allocation TypeSingle-year Grants
SectionSpecial Cancer Research
Research InstitutionGifu University

Principal Investigator

SHIMIZU Hiroyuki  Gifu University School of Medicine, 医学部, 教授 (90073139)

Co-Investigator(Kenkyū-buntansha) ROSS Ronald K.  University of Southern California School of Medicine, 医学部, 教授
YATANI Ryuichi  Mie University School of Medicine, 医学部, 教授 (80024636)
Project Period (FY) 1989
KeywordsProstate cancer / Breast cancer / Age at immigration
Research Abstract

Using age-adjusted incidence rates and proportional incidence ratios, the risks of prostate cancer and breast cancer in two race-ethnicity groups -- Spanish surnamed whites and Japanese -- were studied in Los Angeles County native residents and compared with those in immigrants and representative "homeland" populations. Prostate cancer rates of immigrants were similar to those of US born in the Spanish surnamed white and Japanese populations, regardless of age at immigration. When migration occurred later in life, rates for breast cancer were substantially lower than when migration occurred early; they were still much higher than in the homeland populations. These findings suggest that environmental factors in childhood are especially important in the etiology of breast cancer and that later life events can substantially impact the likelihood of developing clinically detectable prostate cancer.

  • Research Products

    (2 results)

All Other

All Publications (2 results)

  • [Publications] Shimizu,H.: "Cancers of the prostate and breast among Japanese and white immigrants in Los Angeles County" Cancer Research.

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] Shimizu, H.: "Cancers of the prostate and breast among Japanese and white immigrants in Los Angeles County" Cancer Research.

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1993-03-26  

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