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Effects of SO2 on respiratory system of adult Miyakejima resident 2 years after returning to the island.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Iwasawa, Satoko Kikuchi, Yuriko Nishiwaki, Yumiko Nakano, Makiko Michikawa, Takehiro Tsuboi, Tazuru Tanaka, Shigeru Uemura, Takamoto Ishigami, Ai Nakashima, Hiroshi Takebayashi, Toru Adachi, Mitsuru Maruyama, Kouichi Kudo, Shoji Uchiyama, Iwao Omae, Kazuyuki |
| Copyright Year | 2009 |
| Abstract | BACKGROUND Mt. Oyama in Miyakejima Island erupted in June, 2000. All Miyake villagers were forced to evacuate from the island in September, 2000, due to continuous eruptions and emissions of unsafe amounts of volcanic gas, mainly SO2. From February, 2005, Miyake villagers returned to the island despite volcanic gas still being emitted. OBJECTIVES This study examines the 2-yr changes in Miyake residents' respiratory systems from autumn 2004 to November 2006. METHODS The study population was 823 Miyake adult residents who participated in the health check-up in 2006. Respiratory effects were evaluated by a questionnaire for respiratory symptoms and spirometry. SO2 has been continuously monitored at 7 sampling points of the inhabited area. The mean SO2 concentration from February 2005 to November 2006 was 0.031 ppm. The area was categorized into 4 areas by SO2 concentration, namely, areas L, H-1, H-2 and H-3, where average SO2 concentrations were 0.019, 0.026, 0.032, and 0.045 ppm, respectively. RESULTS The study subjects showed no deterioration in lung function. Prevalence of cough and phlegm among all participants were significantly higher in 2006 than in 2004, and age-, sex- and smoking-adjusted odds ratios of cough and phlegm were 1.75 (95%CI 1.33-2.30) and 1.44 (1.12-1.87). Prevalence of chronic bronchitis-like symptoms among normosusceptive subjects in 2006 was 4.1% which was significantly higher than that of 2.1% in 2004 (p=0.035). Compared to area L, the frequencies of phlegm and irritation of the nose were significantly increased in areas H-2 and H-3. CONCLUSION SO2 exposure-related respiratory symptoms were observed in adult Miyakejima residents after returning to the island. |
| Starting Page | 38 |
| Ending Page | 47 |
| Page Count | 10 |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://joh.sanei.or.jp/pdf/E51/E51_1_04.pdf |
| PubMed reference number | 18987426v1 |
| Volume Number | 51 |
| Issue Number | 1 |
| Journal | Journal of occupational health |
| Language | English |
| Access Restriction | Open |
| Subject Keyword | Bronchitis Bronchitis, Chronic Coughing Emission - Male genitalia finding Respiratory System Respiratory physiology Signs and Symptoms, Respiratory Spirometry Sulfur Dioxide checkup examination part per million (ppm) phlegm |
| Content Type | Text |
| Resource Type | Article |
