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Title: Representativeness of individual external doses estimated for one quarter of residents in the Fukushima Prefecture after the nuclear disaster: the Fukushima Health Management Survey
Authors: Ishikawa, Tetsuo
Takahashi, Hideto
Yasumura, Seiji
Ohtsuru, Akira
Sakai, Akira
Ohira, Tetsuya
Sakata, Ritsu
Ozasa, Kotaro
Akahane, Keiichi
Yonai, Shunsuke
Kurihara, Osamu
Kamiya, Kenji
Abe, Masafumi
Affiliation: 放射線医学県民健康管理センター
放射線物理化学講座
公衆衛生学講座
放射線健康管理学講座
放射線生命科学講座
疫学講座
Source title: Journal of radiological protection
Volume: 37
Issue: 3
Start page: 584
End page: 605
Issue Date: 25-Sep-2017
Abstract: After the Fukushima Dai-ichi Nuclear Power Plant accident, the Fukushima Health Management Survey (FHMS) was launched. The Basic Survey, a component of FHMS, is a questionnaire used to survey residents across the Fukushima Prefecture about their behaviour in the first 4 months after the accident. The questionnaire findings are used to determine individual external doses by linking behaviour data to a computer programme with daily gamma ray dose rate maps, drawn after the accident. Through 30 June 2015, the response rate was only 27.2% (558 550 population), indicating that the findings might not be generalisable because of poor representativeness of the population. The objective of this study was to clarify if the data from the FHMS Basic Survey were representative of the entire population, by conducting a new survey to compare the external doses between non-respondents and respondents in the previous survey. A total of 5350 subjects were randomly selected from 7 local regions of Fukushima Prefecture. An interview survey was conducted with the non-respondents to the FHMS Basic Survey. A total of 990 responses were obtained from the previous non-responders by interview survey. For the regions Kempoku, Kenchu, Kennan, Aizu, Minami-Aizu, Soso, and Iwaki, differences in mean effective dose (95% confidence interval) in mSv between the non-responders and previous responders were 0.12 (0.01-0.23), -0.09 (-0.21-0.03), -0.06 (-0.18-0.07), 0.05 (-0.04-0.14), 0.01 (-0.01-0.02), 0.09 (0.01-0.17), 0.09 (0.00-0.17), respectively. The differences fall neither within the interval (-∞, -0.25) nor within the interval (0.25, ∞). These findings imply that mean effective doses between the previous and new respondents were not different, with a significantly indifferent region of 0.25 mSv according to equivalence tests. The present study indicates that the dose distribution obtained from about one-quarter of Fukushima residents represents the dose distribution for the entire Fukushima Prefecture.
Publisher: IOP Publishing
language: eng
URI: http://ir.fmu.ac.jp/dspace/handle/123456789/1577
Full text URL: http://ir.fmu.ac.jp/dspace/bitstream/123456789/1577/1/JRadiolProt_37_p584.pdf
ISSN: 0952-4746
1361-6498
DOI: 10.1088/1361-6498/aa6649
PubMed ID: 28617669
Other version: https://doi.org/10.1088/1361-6498/aa6649
Rights: © 2017 IOP Publishing Ltd. This is the Accepted Manuscript version of an article accepted for publication in "Journal of radiological protection". IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at https://doi.org/10.1088/1361-6498/aa6649.
Rights: https://creativecommons.org/licenses/by-nc-nd/4.0/
Appears in Collections:a10 学術雑誌論文等 = Journal Article
e110 学術雑誌論文等 = Journal Article

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