- 著者
- Jun Shiraishi Takahisa Sawada Shinzo Kimura Hiroyuki Yamada Hiroaki Matsubara for the KYOTO HEART Study Group
- 出版者
- 日本循環器学会
- 雑誌
- Circulation Journal (ISSN:13469843)
- 巻号頁・発行日
- vol.75, no.4, pp.806-814, 2011 (Released:2011-03-25)
- 参考文献数
- 32
- 被引用文献数
- 4 4 8
This article was retracted. See the Notification.
- 著者
- Shinzo Kimura Takahisa Sawada Jun Shiraishi Hiroyuki Yamada Hiroaki Matsubara for the KYOTO HEART Study Group
- 出版者
- 日本循環器学会
- 雑誌
- Circulation Journal (ISSN:13469843)
- 巻号頁・発行日
- pp.CJ-12-0387, (Released:2012-09-12)
- 参考文献数
- 39
- 被引用文献数
- 1
This article was retracted. See the Notification.
- 著者
- Gen SUZUKI Ichiro YAMAGUCHI Hiromitsu OGATA Hideo SUGIYAMA Hidenori YONEHARA Fumiyoshi KASAGI Saeko FUJIWARA Yoshimi TATSUKAWA Ippei MORI Shinzo KIMURA
- 出版者
- Journal of Radiation Research Editorial Committee
- 雑誌
- Journal of Radiation Research (ISSN:04493060)
- 巻号頁・発行日
- vol.51, no.6, pp.683-689, 2010 (Released:2010-11-23)
- 参考文献数
- 23
- 被引用文献数
- 28
In two previous nation-wide surveys in the late 1980s and early 1990s, Japanese indoor radon concentrations increased in homes built after the mid 1970s. In order to ascertain whether this trend continued, a nation-wide survey was conducted from 2007 to 2010. In total 3,900 houses were allocated to 47 prefectures by the Neyman allocation method and 3,461 radon measurements were performed (88.7% success). The fraction of reinforced concrete / concrete block buildings was 32.4%, similar to the value from national statistics. Arithmetic mean (standard deviation, SD) and geometric mean (geometric SD) of radon concentration after adjusting for seasonal fluctuation were 14.3 (14.7) and 10.8 (2.1) Bq/m3. The corresponding population-weighted values were 13.7 (12.3) and 10.4 (2.0) Bq/m3, respectively. It was estimated that only 0.1% of dwellings exceed 100 Bq/m3, a new WHO reference level for indoor radon. Radon concentrations were highest in houses constructed in the mid 1980s and decreased thereafter. In conclusion, arithmetic mean indoor radon in the present survey was slightly lower than in previous surveys and significant reductions in indoor radon concentrations in both wooden and concrete houses can be attributed to alterations in Japanese housing styles in recent decades.