Indoor Particles and Symptoms Among Office Workers: Results from a Double-Blind Cross-Over Study

Details

• Personal Author:
  Boeniger, Mark F. ; Deddens JA ; Dong M ; Faulkner D ; Fisk WJ ; Hines CJ ; Mendell MJ ; Petersen, Martin R. ; Ruder, Avima M. ; Sullivan D
• Description:
  We studied the effects of removing small airborne particles in an office building without unusual contaminant sources or occupant complaints. We conducted a double-blind crossover study of enhanced particle filtration in an office building in the Midwest United States in 1993. We replaced standard particle filters, in separate ventilation systems on two floors, with highly efficient filters on alternate floors weekly over 4 weeks. Repeated-measures models were used to analyze data from weekly worker questionnaires and multiple environmental measurements. Bioaerosol concentrations were low. Enhanced filtration reduced concentrations of the smallest airborne particles by 94%. This reduction was not associated with reduced symptoms among the 396 respondents, but three performance-related mental states improved; for example, the confusion scale decreased (-3.7%; 95% confidence limits (CL) = -6.5, -0.9). Most environmental dissatisfaction variables also improved; eg, "stuffy" air, -5.3% (95% CL = -10.3, -0.4). Cooler temperatures within the recommended comfort range were associated with remarkably large improvement in most outcomes; for example, chest tightness decreased -23.4% (95% CL = -38.1, -8.7) for every 1 degrees C decrease. Benefits of enhanced filtration require assessment in buildings with higher particulate contaminant levels in studies controlling for temperature effects. Benefits from lower indoor temperatures need confirmation. [Description provided by NIOSH]
• Subjects:
  Air Pollutants, Occupational Air Pollution, Indoor Environmental Health Epidemiology Filtration Hazardous Substances Occupational Exposure Occupational Health Particulate Matter Respiratory System Respiratory Tract Diseases Safety Temperature Ventilation

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• Keywords:
  Airborne-particles Air Filtration Author Keywords: Indoor Air Pollutants Environmental-factors Health-hazards Indoor-air-pollution Indoor-environmental-quality Intervention Studies Occupational-exposure Occupational-respiratory-disease Office-workers Particles Symptoms Temperature Temperature-effects

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• ISSN:
  1044-3983
• Document Type:
  Text
• Genre:
  Journal Article
• Place as Subject:
  California ; Ohio ; OSHA Region 5 ; OSHA Region 9
• CIO:
  National Institute for Occupational Safety and Health (NIOSH)
• Division:
  DSHEFS - Division of Surveillance, Hazard Evaluations, and Field Studies
• Topic:
  Workplace Safety & Health
• Location:
  North America
• Pages in Document:
  296-304
• Volume:
  13
• Issue:
  3
• NIOSHTIC Number:
  nn:20023376
• Citation:
  Epidemiology 2002 May; 13(3):296-304
• Contact Point Address:
  Mark J. Mendell, Lawrence Berkeley National Laboratory, 1 Cyclotron Road, MS 90-3058, Berkeley, CA 94720
• Email:
  mjmendell@lbl.gov
• Federal Fiscal Year:
  2002
• NORA Priority Area:
  Work Environment and Workforce: Indoor Environment
• Peer Reviewed:
  True
• Source Full Name:
  Epidemiology
• Collection(s):
  National Institute for Occupational Safety and Health
• Main Document Checksum:
  urn:sha-512:9037356f9d945ff1451ad9f3578da5c950012819ce50329d5c20b61bb6c47fe3e05edcc25f10b5f1cf169347feb78c626bf9eb70a05272e39af2fc2cdd46f3ed
• Download URL:
  https://stacks.cdc.gov/view/cdc/195845/cdc_195845_DS1.pdf
• File Type:
  [PDF - 918.66 KB ]