Nine-month observation of effects of SO2 on the respiratory system in child Miyakejima citizens

Satoko Iwasawa, Takehiro Michikawa, Makiko Nakano, Yuji Nishiwaki, Tazuru Tsuboi, Shigeru Tanaka, Takamoto Uemura, A. Milojevic, Hiroshi Nakashima, Toru Takebayashi, Akihiro Morikawa, Kouichi Maruyama, Shoji Kudo, Iwao Uchiyama, Kazuyuki Omae

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

BACKGROUND: Mt. Oyama on Miyakejima Island erupted in June 2000 and all Miyake village citizens were forced to evacuate the island in the September, due to continuous eruptions and emission of unsafe amounts of volcanic gas, mainly sulfur dioxide (SO2). Beginning in February 2005, residents returned to live on the island despite the fact that volcanic gas was still being emitted. OBJECTIVE: To examine changes in the respiratory systems of included children from February 2006 to November 2006. METHODS: The study population was 141 children who participated in health checkups in November 2006, including 33 SO2 hypersusceptible children who had a current or past history of asthma, obstructive lung function, current symptoms of whistling and wheezing, and/or deterioration of respiratory symptoms. Respiratory effects were evaluated by a questionnaire for respiratory symptoms and by spirometry. SO2 was monitored at 7 sampling points within inhabited areas, and the mean SO2 concentration from February 2005 to November 2006 was 0.031 ppm. The area was categorized into four areas by average SO2 concentration, namely, areas L, H-1, H-2, and H-3, where the average SO2 levels were 0.019, 0.026, 0.032, and 0.045 ppm, respectively. RESULTS: Compared to children in area L, the frequencies of "phlegm" and "irritation of the nose" were significantly greater in the children in areas H-2 and H-3. %FVC and %FEV1 in hypersusceptible children were significantly reduced in November 2006 as compared to February 2006 (P = 0.047, 0.027), though no reduction observed in normosusceptible children. CONCLUSION: Respiratory functions in hypersusceptible Miyakejima children may be affected by SO2 exposure, and further follow-up observation is necessary.

Original languageEnglish
Pages (from-to)39-43
Number of pages5
Journal[Nippon kōshū eisei zasshi] Japanese journal of public health
Volume57
Issue number1
Publication statusPublished - 2010 Jan

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Respiratory System
Observation
Volcanic Eruptions
Islands
Singing
Sulfur Dioxide
Spirometry
Respiratory Sounds
Nose
Asthma
Lung
Health
Population

ASJC Scopus subject areas

  • Medicine(all)

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Nine-month observation of effects of SO2 on the respiratory system in child Miyakejima citizens. / Iwasawa, Satoko; Michikawa, Takehiro; Nakano, Makiko; Nishiwaki, Yuji; Tsuboi, Tazuru; Tanaka, Shigeru; Uemura, Takamoto; Milojevic, A.; Nakashima, Hiroshi; Takebayashi, Toru; Morikawa, Akihiro; Maruyama, Kouichi; Kudo, Shoji; Uchiyama, Iwao; Omae, Kazuyuki.

In: [Nippon kōshū eisei zasshi] Japanese journal of public health, Vol. 57, No. 1, 01.2010, p. 39-43.

Research output: Contribution to journalArticle

Iwasawa, S, Michikawa, T, Nakano, M, Nishiwaki, Y, Tsuboi, T, Tanaka, S, Uemura, T, Milojevic, A, Nakashima, H, Takebayashi, T, Morikawa, A, Maruyama, K, Kudo, S, Uchiyama, I & Omae, K 2010, 'Nine-month observation of effects of SO2 on the respiratory system in child Miyakejima citizens', [Nippon kōshū eisei zasshi] Japanese journal of public health, vol. 57, no. 1, pp. 39-43.
Iwasawa, Satoko ; Michikawa, Takehiro ; Nakano, Makiko ; Nishiwaki, Yuji ; Tsuboi, Tazuru ; Tanaka, Shigeru ; Uemura, Takamoto ; Milojevic, A. ; Nakashima, Hiroshi ; Takebayashi, Toru ; Morikawa, Akihiro ; Maruyama, Kouichi ; Kudo, Shoji ; Uchiyama, Iwao ; Omae, Kazuyuki. / Nine-month observation of effects of SO2 on the respiratory system in child Miyakejima citizens. In: [Nippon kōshū eisei zasshi] Japanese journal of public health. 2010 ; Vol. 57, No. 1. pp. 39-43.
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abstract = "BACKGROUND: Mt. Oyama on Miyakejima Island erupted in June 2000 and all Miyake village citizens were forced to evacuate the island in the September, due to continuous eruptions and emission of unsafe amounts of volcanic gas, mainly sulfur dioxide (SO2). Beginning in February 2005, residents returned to live on the island despite the fact that volcanic gas was still being emitted. OBJECTIVE: To examine changes in the respiratory systems of included children from February 2006 to November 2006. METHODS: The study population was 141 children who participated in health checkups in November 2006, including 33 SO2 hypersusceptible children who had a current or past history of asthma, obstructive lung function, current symptoms of whistling and wheezing, and/or deterioration of respiratory symptoms. Respiratory effects were evaluated by a questionnaire for respiratory symptoms and by spirometry. SO2 was monitored at 7 sampling points within inhabited areas, and the mean SO2 concentration from February 2005 to November 2006 was 0.031 ppm. The area was categorized into four areas by average SO2 concentration, namely, areas L, H-1, H-2, and H-3, where the average SO2 levels were 0.019, 0.026, 0.032, and 0.045 ppm, respectively. RESULTS: Compared to children in area L, the frequencies of {"}phlegm{"} and {"}irritation of the nose{"} were significantly greater in the children in areas H-2 and H-3. {\%}FVC and {\%}FEV1 in hypersusceptible children were significantly reduced in November 2006 as compared to February 2006 (P = 0.047, 0.027), though no reduction observed in normosusceptible children. CONCLUSION: Respiratory functions in hypersusceptible Miyakejima children may be affected by SO2 exposure, and further follow-up observation is necessary.",
author = "Satoko Iwasawa and Takehiro Michikawa and Makiko Nakano and Yuji Nishiwaki and Tazuru Tsuboi and Shigeru Tanaka and Takamoto Uemura and A. Milojevic and Hiroshi Nakashima and Toru Takebayashi and Akihiro Morikawa and Kouichi Maruyama and Shoji Kudo and Iwao Uchiyama and Kazuyuki Omae",
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T1 - Nine-month observation of effects of SO2 on the respiratory system in child Miyakejima citizens

AU - Iwasawa, Satoko

AU - Michikawa, Takehiro

AU - Nakano, Makiko

AU - Nishiwaki, Yuji

AU - Tsuboi, Tazuru

AU - Tanaka, Shigeru

AU - Uemura, Takamoto

AU - Milojevic, A.

AU - Nakashima, Hiroshi

AU - Takebayashi, Toru

AU - Morikawa, Akihiro

AU - Maruyama, Kouichi

AU - Kudo, Shoji

AU - Uchiyama, Iwao

AU - Omae, Kazuyuki

PY - 2010/1

Y1 - 2010/1

N2 - BACKGROUND: Mt. Oyama on Miyakejima Island erupted in June 2000 and all Miyake village citizens were forced to evacuate the island in the September, due to continuous eruptions and emission of unsafe amounts of volcanic gas, mainly sulfur dioxide (SO2). Beginning in February 2005, residents returned to live on the island despite the fact that volcanic gas was still being emitted. OBJECTIVE: To examine changes in the respiratory systems of included children from February 2006 to November 2006. METHODS: The study population was 141 children who participated in health checkups in November 2006, including 33 SO2 hypersusceptible children who had a current or past history of asthma, obstructive lung function, current symptoms of whistling and wheezing, and/or deterioration of respiratory symptoms. Respiratory effects were evaluated by a questionnaire for respiratory symptoms and by spirometry. SO2 was monitored at 7 sampling points within inhabited areas, and the mean SO2 concentration from February 2005 to November 2006 was 0.031 ppm. The area was categorized into four areas by average SO2 concentration, namely, areas L, H-1, H-2, and H-3, where the average SO2 levels were 0.019, 0.026, 0.032, and 0.045 ppm, respectively. RESULTS: Compared to children in area L, the frequencies of "phlegm" and "irritation of the nose" were significantly greater in the children in areas H-2 and H-3. %FVC and %FEV1 in hypersusceptible children were significantly reduced in November 2006 as compared to February 2006 (P = 0.047, 0.027), though no reduction observed in normosusceptible children. CONCLUSION: Respiratory functions in hypersusceptible Miyakejima children may be affected by SO2 exposure, and further follow-up observation is necessary.

AB - BACKGROUND: Mt. Oyama on Miyakejima Island erupted in June 2000 and all Miyake village citizens were forced to evacuate the island in the September, due to continuous eruptions and emission of unsafe amounts of volcanic gas, mainly sulfur dioxide (SO2). Beginning in February 2005, residents returned to live on the island despite the fact that volcanic gas was still being emitted. OBJECTIVE: To examine changes in the respiratory systems of included children from February 2006 to November 2006. METHODS: The study population was 141 children who participated in health checkups in November 2006, including 33 SO2 hypersusceptible children who had a current or past history of asthma, obstructive lung function, current symptoms of whistling and wheezing, and/or deterioration of respiratory symptoms. Respiratory effects were evaluated by a questionnaire for respiratory symptoms and by spirometry. SO2 was monitored at 7 sampling points within inhabited areas, and the mean SO2 concentration from February 2005 to November 2006 was 0.031 ppm. The area was categorized into four areas by average SO2 concentration, namely, areas L, H-1, H-2, and H-3, where the average SO2 levels were 0.019, 0.026, 0.032, and 0.045 ppm, respectively. RESULTS: Compared to children in area L, the frequencies of "phlegm" and "irritation of the nose" were significantly greater in the children in areas H-2 and H-3. %FVC and %FEV1 in hypersusceptible children were significantly reduced in November 2006 as compared to February 2006 (P = 0.047, 0.027), though no reduction observed in normosusceptible children. CONCLUSION: Respiratory functions in hypersusceptible Miyakejima children may be affected by SO2 exposure, and further follow-up observation is necessary.

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