High Initial-dose Dependency of Cerebrovascular Disease Mortality among Female Survivors of the Hiroshima Atomic Bomb Exposed in Teens : A Cohort Study, 1970-2010
Hiroshima Journal of Medical Sciences 65 巻 2 号
35-43 頁
2016-06 発行
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| ファイル情報(添付) | |
| タイトル ( eng ) |
High Initial-dose Dependency of Cerebrovascular Disease Mortality among Female Survivors of the Hiroshima Atomic Bomb Exposed in Teens : A Cohort Study, 1970-2010
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| 作成者 |
Matsuba Junji
Ohtaki Megu
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| 収録物名 |
Hiroshima Journal of Medical Sciences
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| 巻 | 65 |
| 号 | 2 |
| 開始ページ | 35 |
| 終了ページ | 43 |
| 収録物識別子 |
[PISSN] 0018-2052
[EISSN] 2433-7668
[NCID] AA00664312
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| 抄録 |
Several studies have been conducted on cerebrovascular disease mortality in Atomic bomb survivors. Previous studies have investigated the relationship between mortality and initial radiation dose after adjusting for the effects of sex and age at the time of the bombing (ATB), and detected a weak (but statistically significant) dose-response relationship was detected. The objective of the present study was to examine whether the sex- and age ATB-specific cerebrovascular disease mortality among Hiroshima atomic bomb survivors can be explained by the initial radiation dose. At Hiroshima University, a cohort study has been conducted with Hiroshima Atomic Bomb Survivors (ABS) since 1970. We selected 30,378 subjects from the ABS who were exposed at 3.5 km or less from the hypocenter and still alive on January 1, 1970. These subjects were followed up until December 31, 2010. The cohort data were stratified with respect to sex and age ATB into 10-year age groups. For each stratum, using Cox regression, we performed survival analyses of the risk of cerebrovascular mortality using the initial radiation dose and the exposure distance (the ground distance between the exposure location and the hypocenter) as explanatory variables. The results indicated that the risks to females exposed at 10 to 19 years old were highly dependent on the initial radiation dose (hazard ratio: 1.51, p < 0.001), while the risks to males were not. There might exist some radiation exposure effects limited to women who were in their teens at the time of exposure. However, the background mechanisms remain unclear, necessitating further study.
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| 著者キーワード |
Atomic bomb survivors
Cerebrovascular disease
Dose-response relationship
Exposure-distance
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| 内容記述 |
This study was supported in part by Grants-in-Aid for Scientific Research (A) 24249039, Young Scientists (B) 23790694, and 23700337 from the Japanese Ministry of Education, Culture, Sports, Science and Technology.
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| NDC分類 |
医学 [ 490 ]
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| 言語 |
英語
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| 資源タイプ | 紀要論文 |
| 出版者 |
Hiroshima University Medical Press
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| 発行日 | 2016-06 |
| 権利情報 |
Copyright (c) 2016 Hiroshima University Medical Press
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| 出版タイプ | Version of Record（出版社版。早期公開を含む） |
| アクセス権 | オープンアクセス |
| 収録物識別子 |
[ISSN] 0018-2052
[NCID] AA00664312
|
