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Effects of Asian Dust Events on Daily Mortality in Nagasaki, Japan

2010; Lippincott Williams & Wilkins; Volume: 22; Linguagem: Inglês

10.1097/01.ede.0000392068.93462.17

1531-5487

Masahiro Hashizume, Yuji Nishiwaki, Takehiro Michikawa, Kayo Ueda, Daisuke Onozuka, Kenichi Yokota, Mariko Mine, Atsuko Mori, Atsushi Shimizu, Nobuo Sugimoto, Taro Yamamoto,

Radiation Dose and Imaging

O-31A1-1 Background/Aims: Asian dust, called “kosa” in Japan, is the long-range transport of atmospheric pollutants originating from the desert areas of China and Mongolia. We aimed to quantify the potential effects of Asian dust on daily mortality in Nagasaki, Japan. Methods: We used the definition of Japan Meteorological Agency for an Asian dust event. Information on the day of death, sex, age at death, cause of death, chronic disease status, smoking habit for all deaths between 1990 and 2006 in the Atomic Bomb Survivors living in Nagasaki city were retrieved. Time-series analysis of all cause deaths and deaths resulting from circulatory and respiratory diseases were performed using a generalized linear Poisson regression model adjusting for suspended particulate matters (SPM), Ox, SO2, and NO2. Effects for single-day lags of 0, 1, and 2 days were examined. Results: There were 20,822 deaths in the study period and more than 95% of the deaths were 60 years or older. Thirty-three percent of the deaths were due to circulatory diseases and 17% were due to respiratory diseases. Never smoker consists 24% and the person treated for diabetes and hypertension were 5% and 14%, respectively. Concentrations of SPM and Ox in March–May were significantly higher in the day of Asian dust than in non-Asian dust day. All cause, circulatory and respiratory daily mortality were 0.5% (95% CI: −10.0, 12.2), 8.8% (95% CI: −10.0, 31.5) and −12.6% (95% CI: −33.7, 15.3) higher on days of Asian dust compared to other days. Conclusion: We found little evidence of the effects of Asian dust on daily mortality in Nagasaki.