30 years follow-up and increased risks of breast cancer and leukaemia after long-term low-dose-rate radiation exposure

Wan Hua Hsieh, I. Feng Lin, Jung Chun Ho, Peter Wushou Chang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

Background: The current study followed-up site-specific cancer risks in an unique cohort with 30 years’ follow-up after long-term low-dose-rate radiation exposure in Taiwan. Methods: 6242 Taiwanese people received extra exposure in residential and school buildings constructed with Co-60- contaminated steel from 1982 until informed and relocated in early 1990s. The additional doses received have been estimated. During 1983–2012, 300 cancer cases were identified through the national cancer registry in Taiwan, 247 cases with minimum latent periods from initial exposure. The hazard ratios (HR) of site-specific cancers were estimated with additional cumulative exposure estimated individually. Results: Dose-dependent risks were statistically significantly increased for leukaemia excluding chronic lymphocytic leukaemia (HR100mSv 1.18; 90% CI 1.04–1.28), breast cancers (HR100mSv 1.11; 90% CI 1.05–1.20), and all cancers (HR100mSv 1.05; 90% CI 1.0–1.08, P=0.04). Women with an initial age of exposure lower than 20 were shown with dose response increase in breast cancers risks (HR100mSv 1.38; 90% CI 1.14–1.60; P=0.0008).

Original languageEnglish
Pages (from-to)1883-1887
Number of pages5
JournalBritish Journal of Cancer
Volume117
Issue number12
DOIs
StatePublished - 2017

Keywords

  • Cancer
  • Co-60-contaminated steel
  • Long-term cumulative exposure
  • Low-dose-rate

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