Association between chemical components of PM_2.5 and children's primary care night-time visits due to asthma attacks: A case-crossover study

• Yamazaki Shin

  Environmental Epidemiology Section, National Institute for Environmental Studies

• Shima Masayuki

  Department of Public Health, Hyogo College of Medicine

• Yoda Yoshiko

  Department of Public Health, Hyogo College of Medicine

• Kurosaka Fumitake

  Himeji Medical Association

• Isokawa Toshio

  Himeji Medical Association

• Shimizu Shigeta

  Himeji Medical Association

• Ogawa Teruhiro

  Himeji Medical Association

• Kamiyoshi Naohiro

  Himeji Medical Association

• Terada Kunihiko

  Himeji Medical Association

• Nishikawa Jittoku

  Himeji Medical Association

• Hanaoka Kenji

  Himeji Medical Association

• Yamada Taku

  Himeji Medical Association

• Matsuura Shinro

  Himeji Medical Association

• Hongo Akihiro

  Himeji Medical Association

• Yamamoto Ichiro

  Himeji Medical Association

Bibliographic Information

Other Title

• Association between chemical components of PM2.5 and children's primary care night-time visits due to asthma attacks: A case-crossover study

Abstract

Background: Few papers have examined the association between the chemical components of PM_2.5 and health effects. The existence of an association is now under discussion. Methods: This case-crossover study aimed to examine the association between the chemical components of PM_2.5 and night-time primary care visits (PCVs) due to asthma attacks. The subjects were 1251 children aged 0-14 years who received medical care for asthma at a municipal emergency clinic. We measured daily average concentrations of hydrogen ion, sulfate ion, nitrate ion and water-soluble organic compounds (WSOCs), which are components of PM_2.5. We estimated the odds ratios (ORs) of PCVs per unit increment (inter quartile ranges) in each chemical component of PM_2.5 for the subgroups of warmer months and colder months separately. Results: No association was seen between PCVs and PM_2.5 mass concentrations the day before the PCVs in either warmer or colder months. In the warmer months, an association was seen with the concentrations of WSOCs and hydrogen ion the day before the PCVs (OR = 1.33; 95% CI: 1.00-1.76, OR = 1.18; 95% CI: 1.02-1.36, respectively). Furthermore, a negative association was seen between sulfate ion and PCVs (OR = 0.85; 95%CI: 0.74-0.98). No associations were observed in the colder months. Conclusions: We observed a positive association between PCVs and certain concentrations of WSOCs and hydrogen ions in warmer months. In contrast, sulfate ion showed a negative association.

Journal

• Allergology International

  Allergology International 68 (3), 329-334, 2019

  Japanese Society of Allergology

Keywords

• Air pollution
• Asthma
• Chemical component
• Particulate matter
• PM_2.5

Details

• CRID: 1390564238106240384
• NII Article ID: 130007678456
• DOI: 10.1016/j.alit.2019.01.001
• ISSN: 14401592
• ISSN: 13238930
• Web Site: https://api.elsevier.com/content/article/PII:S1323893019300103?httpAccept=text/xml
• Web Site: https://api.elsevier.com/content/article/PII:S1323893019300103?httpAccept=text/plain
• Web Site: https://search.jamas.or.jp/link/ui/2020222172
• Text Lang: en
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed