Respiratory Hospital Admissions and Summertime Haze Air Pollution in Toronto, Ontario: Consideration of the Role of Acid Aerosols

Details

• Personal Author:
  Bates DV ; Hayes CG ; Ito K ; Lippmann, Morton ; Thurston GD
• Description:
  A study of air pollution and daily hospital admissions for respiratory causes was conducted in Toronto, Ontario. Fine aerosol (da < 2.5 micro m) samples were collected daily at a central city site during July and August 1986, 1987, and 1988 and were subsequently extracted and analyzed for daily particulate phase aerosol strong acidity (H+) and sulfates (SO4=). Daily counts of respiratory admissions to 22 acute care hospitals and daily meteorological and environmental data (e.g. ozone O3, total suspended particulate matter TSP, and thoracic particle mass PM10 were also obtained. Regression analyses indicated that only the O3, H+, and SO4= associations with respiratory and asthma admissions remained consistently significant after controlling for temperature. Even after excluding days with maximum 1-hr O3 > 120 ppb, O3 was still strongly significant. In the various model specifications considered, the relative particle metric strengths of association with admissions were generally H+ > SO4= > FP > PM10 > TSP, indicating that particle size and composition are of central importance in defining the adverse human health effects of particulate matter. On average, summertime haze air pollution was associated with 24% of all respiratory admissions (21% with O3, 3% with H+). On peak pollution days, however, aerosol acidity yielded the highest relative risk estimates (e.g., RR = 1.5 at 391 nmole/m3 H+), and summertime haze was associated with roughly half of all respiratory admissions. Description provided by NIOSH
• Subjects:
  • Acids
  • Aerosols
  • Air Pollution
  • Environmental Monitoring
  • Occupational Health
  • Ozone
  • Particulate Matter
  • Respiratory System
  • Safety
• Keywords:
  • Air pollution
  • Aerosols
  • Acids
  • Particulates
  • Air monitoring
  • Environmental monitoring
  • Health effects
  • Ozone
  • Respiratory health
• ISSN:
  0013-9351
• Document Type:
  Text
• Funding:
  Grant
• Genre:
  Journal Article
• Place as Subject:
  New York ; North Carolina ; OSHA Region 2 ; OSHA Region 4
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  271-290
• Volume:
  65
• Issue:
  2
• NIOSHTIC Number:
  nn:20060062
• Citation:
  Environ Res 1994 May; 65(2):271-290
• CAS Registry Number:
  • Ozone (CAS RN 10028-15-6)
• Federal Fiscal Year:
  1994
• Performing Organization:
  Mount Sinai School of Medicine, New York
• Peer Reviewed:
  True
• Start Date:
  19920701
• Source Full Name:
  Environmental Research
• End Date:
  19970630
• Download URL:
  https://stacks.cdc.gov/view/cdc/224095/cdc_224095_DS1.pdf
• File Type:
  [PDF - 1.20 MB]
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:3190b21b64221f80eaf8b2572abfe88b79313b7cbb5b7bc1b1be6c0d38209e9acd19a37600c3ce9550339001981c403e49a6b157012ce3b812a70e53d9d22311