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ATOMIC BOMB CASUALTY COMMISSION
HIROSHIMA AND NAGASAKI
 A case-control study in
Hiroshima and Nagasaki
examining non-radiation
risk factors for thyroid
cancer.
CONTENT :-
 INTRODUCTION TO ATOMIC BUMB
 BACKGROUND
 METHODS
 RESULTS
 CONCLUSION
BACKGROUND:
Because little is known about the aetiology
of thyroid cancer in Japan, we conducted a
case-control study of thyroid cancer and
lifestyle and other risk factors. The present
report focuses on medical history, family
history, smoking and alcohol drinking, and
their interactions with radiation exposure.
METHODS:
Thyroid cancer cases reported to the Hiroshima and
Nagasaki tumour registries during 1970-1986 were
histological reviewed by pathologists. For each of 362
cases with papillary or follicular adenocarcinoma
diagnosed at <75 years of age, one control without
cancer matched on city, sex, year of birth, and atomic-
bomb radiation exposure was selected from the Life
Span Study cohort or the offspring cohort. The cohort
subjects were residents of Hiroshima and Nagasaki with
or without atomic-bomb radiation exposure.
Information on risk factors was obtained through a pre-
structured interview carried out in 1986-1988.
RESULTS:
Analysis using conditional logistic regression showed
history of goiter or thyroid nodule and family history of
cancer to be significantly associated with an increased
odds ratio for thyroid cancer. Smoking and alcohol
drinking were significantly and independently
associated with a reduced odds ratio. Interaction
between smoking and alcohol drinking was not evident
based on either an additive model or a multiplicative
model. Radiation exposure did not significantly modify
the associations between these factors and thyroid
cancer risk.
CONCLUSION:
History of goiter/nodule and family
history of cancer were risk factors for
thyroid cancer. Smoking and alcohol
drinking were independently associated
with reduced risk. Self-reported
retrospective information presents some
limitations in interpretation of the data
Case control study in hiroshima and nagasaki
Case control study in hiroshima and nagasaki

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Case control study in hiroshima and nagasaki

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  • 2. ATOMIC BOMB CASUALTY COMMISSION HIROSHIMA AND NAGASAKI  A case-control study in Hiroshima and Nagasaki examining non-radiation risk factors for thyroid cancer.
  • 3. CONTENT :-  INTRODUCTION TO ATOMIC BUMB  BACKGROUND  METHODS  RESULTS  CONCLUSION
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  • 11. BACKGROUND: Because little is known about the aetiology of thyroid cancer in Japan, we conducted a case-control study of thyroid cancer and lifestyle and other risk factors. The present report focuses on medical history, family history, smoking and alcohol drinking, and their interactions with radiation exposure.
  • 12. METHODS: Thyroid cancer cases reported to the Hiroshima and Nagasaki tumour registries during 1970-1986 were histological reviewed by pathologists. For each of 362 cases with papillary or follicular adenocarcinoma diagnosed at <75 years of age, one control without cancer matched on city, sex, year of birth, and atomic- bomb radiation exposure was selected from the Life Span Study cohort or the offspring cohort. The cohort subjects were residents of Hiroshima and Nagasaki with or without atomic-bomb radiation exposure. Information on risk factors was obtained through a pre- structured interview carried out in 1986-1988.
  • 13. RESULTS: Analysis using conditional logistic regression showed history of goiter or thyroid nodule and family history of cancer to be significantly associated with an increased odds ratio for thyroid cancer. Smoking and alcohol drinking were significantly and independently associated with a reduced odds ratio. Interaction between smoking and alcohol drinking was not evident based on either an additive model or a multiplicative model. Radiation exposure did not significantly modify the associations between these factors and thyroid cancer risk.
  • 14. CONCLUSION: History of goiter/nodule and family history of cancer were risk factors for thyroid cancer. Smoking and alcohol drinking were independently associated with reduced risk. Self-reported retrospective information presents some limitations in interpretation of the data