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2005 Fiscal Year Final Research Report Summary

The assessment of the effects of motor-vehicle exhaust gas on the respiratory symptoms of children, through a large-scale long-term longitudinal survey

Research Project

Project/Area Number 16590524
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Public health/Health science
Research InstitutionKinki University

Principal Investigator

YURA Akiko  Kinki University, School of Medicine, Research Assistant, 医学部, 助手 (80142595)

Co-Investigator(Kenkyū-buntansha) SHIMIZU Tadahiko  Kinki University, Emeritus Professor, 医学部, 名誉教授 (00088519)
Project Period (FY) 2004 – 2005
KeywordsCough / Prevalence rate / School children / Nitrogen dioxide / Motor-vehicle exhaust gas / Air pollution / Climate
Research Abstract

A total of 15 questionnaire surveys on subjective symptoms have been conducted on all public elementary-school children in Osaka Prefecture at 2- or 3-year intervals between 1973 and 2003. The prevalence rate of "coughing" among children has remained at the same level, approximately 10%, since 1983. A significant inverse correlation was observed between the prevalence rate of "coughing"(surveyed in October) and the mean temperature in July and August of the relevant year. It is supposed that the summer climate had an effect on the prevalence rate of "coughing." In the logistic regression analysis of the individual questionnaire data obtained from some sampled schools, the odds ratios of "residents along heavy-traffic roads" to "coughing" were 1.37〜1.70 (p<0.001) for every survey. Also, a significant correlation was observed between the prevalence rate of "coughing" and the percentage of "residents along heavy-traffic roads". Since there is a strong correlation between the percentage of "residents along heavy-traffic roads" and the atmospheric nitrogen dioxide (NO_2) concentration, it was considered that the percentage was available as the index of motor-vehicle exhaust gas pollution. The percentage of "residents along heavy-traffic roads" and the NO_2 levels in Osaka Prefecture had decreased slightly since 1995. Then, it was suggested that the prevalence rate of "coughing" among children had decreased due to the decline in the NO_2 levels. In addition, the lower limits of the NO_2 levels which have an effect on the "coughing" symptoms of children were estimated to be 0.022〜0.024 ppm in terms of the annual mean value.

  • Research Products

    (4 results)

All 2006 2005

All Journal Article (4 results)

  • [Journal Article] 大規模長期縦断研究による児童の「咳」有訴者率と自動車排ガス汚染の関連2006

    • Author(s)
      由良晶子, 伊木雅之, 清水忠彦
    • Journal Title

      Journal of Epidemiology 16・1 Supp1.

      Pages: 182

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Relation of motor-vehicle exhaust gas to the prevalence rate of cough among school children, through a large-scale long-term longitudinal survey2006

    • Author(s)
      Yura A, Iki M, Shimizu T
    • Journal Title

      J.of Epidemiology 16・1 Suppl.

      Pages: 182

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] 児童の「咳」有訴者率に対する自動車排ガス汚染の影響2005

    • Author(s)
      由良晶子, 伊木雅之, 清水忠彦, 井藤尚之, 酒井英雄, 酒井國男
    • Journal Title

      日本公衆衛生雑誌 52・8 Supp1.

      Pages: 1034

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Effects of motor-vehicle exhaust gas on the prevalence rate of cough among school children2005

    • Author(s)
      Yura A, Iki M, Shimizu T
    • Journal Title

      Japanese J.of Public Health 52・8 Suppl.

      Pages: 1034

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

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