| Volcanic sulfur dioxide and acute respiratory symptoms on Miyakejima island. | |
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MedLine Citation:
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PMID: 18801927 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: Following a volcanic eruption in 2000, high concentrations of ambient sulfur dioxide (SO2) are still observed on Miyakejima, Japan despite the reversal 2 years ago of the ban on residents living on the island. This study examines the association between current levels of volcanic SO2 and the incidence of acute subjective symptoms in volunteers on Miyakejima. METHODS: The authors conducted a follow-up study on 611 healthy volunteers, on a person-hour basis (28 413 person-hours), who visited the island to provide support to residents from February to July 2005. Adverse health symptoms were measured by self-administered diary and exposure was approximated using monitoring data across 14 sites. Associations between incidence rates and increasing SO2 levels (reference (the lowest), very low, low, middle and high) were examined using Poisson regression. RESULTS: Hourly incidence of cough, scratchy throat, sore throat and breathlessness showed clear exposure-response relationships with SO2 concentrations. There were statistically significant risks of those symptoms at relatively low SO2 levels. Thus, rate ratios in the 0.6-2.0 ppm exposure band (vs <0.01 ppm) were: for cough, 3.4 (95% CI 1.8 to 6.6) in men and 9.8 (3.9 to 24.9) in women; for sore throat, 3.2 (1.7 to 6.2) in men and 5.8 (2.0 to 16.5) in women; and for breathlessness, 10.5 (4.2 to 26.6) in men and 18.5 (4.6 to 74.3) in women. Little evidence of SO2 effects on sputum and nasal discharge/congestion was observed in this study. Eye and skin irritations showed inconsistent results between hourly maximal and hourly mean SO2 concentrations. CONCLUSION: The authors observed strong evidence of an exposure-response relationship between volcanic SO2 and subjective acute respiratory symptoms among a healthy population on Miyakejima. The results are consistent with reports that females and non-smokers are more sensitive to irritant gas than males and smokers, respectively. |
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Authors:
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A Ishigami; Y Kikuchi; S Iwasawa; Y Nishiwaki; T Takebayashi; S Tanaka; K Omae |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Occupational and environmental medicine Volume: 65 ISSN: 1470-7926 ISO Abbreviation: Occup Environ Med Publication Date: 2008 Oct |
Date Detail:
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Created Date: 2008-09-19 Completed Date: 2009-02-19 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9422759 Medline TA: Occup Environ Med Country: England |
Other Details:
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Languages: eng Pagination: 701-7 Citation Subset: IM |
Affiliation:
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Public & Environmental Health Research Unit, London School of Hygiene & Tropical Medicine, Kappel Street, London WC1E7HT, UK. ai.milojevic@lshtm.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acute Disease Adolescent Adult Aged Air Pollutants / analysis, toxicity* Environmental Exposure / adverse effects, analysis Female Guidelines as Topic Humans Incidence Japan / epidemiology Male Middle Aged Respiratory Tract Diseases / chemically induced*, epidemiology Sulfur Dioxide / analysis, toxicity* Volcanic Eruptions / adverse effects* Young Adult |
| Chemical | |
Reg. No./Substance:
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0/Air Pollutants; 7446-09-5/Sulfur Dioxide |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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