Estimated association between dwelling soil contamination and internal radiation contamination levels after the 2011 Fukushima Daiichi nuclear accident in Japan

Masaharu Tsubokura, Shuhei Nomura, Kikugoro Sakaihara, Shigeaki Kato, Claire Leppold, Tomoyuki Furutani, Tomohiro Morita, Tomoyoshi Oikawa, Yukio Kanazawa

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Objectives: Measurement of soil contamination levels has been considered a feasible method for dose estimation of internal radiation exposure following the Chernobyl disaster by means of aggregate transfer factors; however, it is still unclear whether the estimation of internal contamination based on soil contamination levels is universally valid or incident specific. Methods: To address this issue, we evaluated relationships between in vivo and soil cesium-137 (Cs- 137) contamination using data on internal contamination levels among Minamisoma (10-40 km north from the Fukushima Daiichi nuclear power plant), Fukushima residents 2-3 years following the disaster, and constructed three models for statistical analysis based on continuous and categorical (equal intervals and quantiles) soil contamination levels. Results: A total of 7987 people with a mean age of 55.4 years underwent screening of in vivo Cs-137 wholebody counting. A statistically significant association was noted between internal and continuous Cs-137 soil contamination levels (model 1, p value 2 increase in soil contamination). Analysis of categorical soil contamination levels showed statistical (but not clinical) significance only in relatively higher soil contamination levels (model 2: Cs-137 levels above 100 kBq/m2 compared to those 2, RR=1.75, p value 2 compared to those 2, RR=1.45, p value

Original languageEnglish
Article number010970
JournalBMJ Open
Volume6
Issue number6
DOIs
Publication statusPublished - 2016 Jun 1

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Fukushima Nuclear Accident
Japan
Soil
Radiation
Disasters
Nuclear Power Plants
Transfer Factor
Cesium
Statistical Models

ASJC Scopus subject areas

  • Medicine(all)

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Estimated association between dwelling soil contamination and internal radiation contamination levels after the 2011 Fukushima Daiichi nuclear accident in Japan. / Tsubokura, Masaharu; Nomura, Shuhei; Sakaihara, Kikugoro; Kato, Shigeaki; Leppold, Claire; Furutani, Tomoyuki; Morita, Tomohiro; Oikawa, Tomoyoshi; Kanazawa, Yukio.

In: BMJ Open, Vol. 6, No. 6, 010970, 01.06.2016.

Research output: Contribution to journalArticle

Tsubokura, Masaharu ; Nomura, Shuhei ; Sakaihara, Kikugoro ; Kato, Shigeaki ; Leppold, Claire ; Furutani, Tomoyuki ; Morita, Tomohiro ; Oikawa, Tomoyoshi ; Kanazawa, Yukio. / Estimated association between dwelling soil contamination and internal radiation contamination levels after the 2011 Fukushima Daiichi nuclear accident in Japan. In: BMJ Open. 2016 ; Vol. 6, No. 6.
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