Affordable Access

deepdyve-link
Publisher Website

Gastrointestinal Cancer Survival and Radiation Exposure among Atomic Bomb Survivors: The Life Span Study.

Authors
  • Bockwoldt, Brandie R1
  • Sugiyama, Hiromi2
  • Tsai, Kevin1
  • Bhatti, Parveen3
  • Brenner, Alina V4
  • Hu, Audrey1
  • Kerr, Kathleen F5
  • Morenz, Eric5
  • French, Benjamin6
  • Phipps, Amanda I7
  • 1 Department of Epidemiology, University of Washington.
  • 2 Epidemiology, Radiation Effects Research Foundation.
  • 3 BC Cancer.
  • 4 Division of Cancer Epidemiology and Genetics, National Cancer Institute.
  • 5 Department of Biostatistics, University of Washington.
  • 6 Vanderbilt University.
  • 7 Department of Epidemiology, University of Washington [email protected]
Type
Published Article
Journal
Cancer Epidemiology Biomarkers & Prevention
Publisher
American Association for Cancer Research
Publication Date
Nov 16, 2020
Identifiers
DOI: 10.1158/1055-9965.EPI-20-1239
PMID: 33199439
Source
Medline
Language
English
License
Unknown

Abstract

Radiation exposure is an established risk factor for the development of several forms of cancer, including gastrointestinal cancers. However, few studies have investigated the relationship between pre-diagnostic radiation exposure and survival after cancer diagnosis. Participants in the Life Span Study (LSS) of atomic bomb survivors who were diagnosed with a first primary invasive stomach, colon, or rectal cancer between 1958-2009 were followed for mortality during 1958-2014. Cox regression models were used to calculate hazard ratios (HRs) and 95% confidence intervals (CIs) for associations of radiation dose from atomic bomb exposure with survival (cancer-specific and overall) after cancer diagnosis. Analyses were adjusted for city of primary exposure, sex, age at diagnosis, and year of diagnosis. We identified 7,728 eligible cancer patients for analysis. We observed no statistically significant associations between radiation dose and cancer-specific survival among LSS participants with a gastrointestinal cancer. Higher radiation doses (≥1 Gy) were suggestively, but not significantly, associated with modestly poorer cancer-specific survival for colon cancer only (HR=1.38, 95% CI: 0.90-2.12), and were associated with poorer overall survival regardless of cancer site. Although radiation exposure is associated with increased risk of gastrointestinal cancer incidence and mortality, study results are inconclusive about an association between pre-diagnostic radiation exposure and survival after gastrointestinal cancer diagnosis. Radiation exposure from the atomic bomb before gastrointestinal cancer diagnosis was not associated with cancer survival, but should be evaluated in relation to survival for other cancer types. Copyright ©2020, American Association for Cancer Research.

Report this publication

Statistics

Seen <100 times