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Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties.

Publication ,  Journal Article
Bravo, MA; Ebisu, K; Dominici, F; Wang, Y; Peng, RD; Bell, ML
Published in: Environmental health perspectives
April 2017

Evidence of health risks associated with ambient airborne fine particles in nonurban populations is extremely limited.We estimated the risk of hospitalization associated with short-term exposures to particulate matter with an aerodynamic diameter < 2.5 μm (PM2.5) in urban and nonurban counties with population ≥ 50,000.We utilized a database of daily cardiovascular- and respiratory-related hospitalization rates constructed from Medicare National Claims History files (2002-2006), including 28 million Medicare beneficiaries in 708 counties. Daily PM2.5 exposures were estimated using the Community Multiscale Air Quality (CMAQ) downscaler. We used time-series analysis of hospitalization rates and PM2.5 to evaluate associations between PM2.5 levels and hospitalization risk in single-pollutant models.We observed an association between cardiovascular hospitalizations and same-day PM2.5 with higher risk in urban counties: 0.35% [95% posterior interval (PI): -0.71%, 1.41%] and 0.98% (95% PI: 0.73%, 1.23%) increases in hospitalization risk per 10-μg/m3 increment in PM2.5 were observed in the least-urban and most-urban counties, respectively. The largest association for respiratory hospitalizations, a 2.57% (95% PI: 0.87%, 4.30%) increase per 10-μg/m3 increase in PM2.5, was observed in the least-urban counties; in the most-urban counties, a 1.13% (0.73%, 1.54%) increase was observed. Effect estimates for cardiovascular hospitalizations were highest for smaller lag times, whereas effect estimates for respiratory hospitalizations increased as more days of exposure were included.In nonurban counties with population ≥ 50,000, exposure to PM2.5 is associated with increased risk for respiratory hospitalizations; in urban counties, exposure is associated with increased risk of cardiovascular hospitalizations. Effect estimates based on a single day of exposure may underestimate true effects for respiratory hospitalizations.

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Published In

Environmental health perspectives

DOI

EISSN

1552-9924

ISSN

0091-6765

Publication Date

April 2017

Volume

125

Issue

4

Start / End Page

594 / 601

Related Subject Headings

  • United States
  • Toxicology
  • Risk Assessment
  • Respiratory Tract Diseases
  • Particulate Matter
  • Hospitalization
  • Environmental Exposure
  • Cardiovascular Diseases
  • Air Pollution
  • Air Pollutants
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Bravo, M. A., Ebisu, K., Dominici, F., Wang, Y., Peng, R. D., & Bell, M. L. (2017). Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties. Environmental Health Perspectives, 125(4), 594–601. https://doi.org/10.1289/ehp257
Bravo, Mercedes A., Keita Ebisu, Francesca Dominici, Yun Wang, Roger D. Peng, and Michelle L. Bell. “Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties.Environmental Health Perspectives 125, no. 4 (April 2017): 594–601. https://doi.org/10.1289/ehp257.
Bravo MA, Ebisu K, Dominici F, Wang Y, Peng RD, Bell ML. Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties. Environmental health perspectives. 2017 Apr;125(4):594–601.
Bravo, Mercedes A., et al. “Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties.Environmental Health Perspectives, vol. 125, no. 4, Apr. 2017, pp. 594–601. Epmc, doi:10.1289/ehp257.
Bravo MA, Ebisu K, Dominici F, Wang Y, Peng RD, Bell ML. Airborne Fine Particles and Risk of Hospital Admissions for Understudied Populations: Effects by Urbanicity and Short-Term Cumulative Exposures in 708 U.S. Counties. Environmental health perspectives. 2017 Apr;125(4):594–601.

Published In

Environmental health perspectives

DOI

EISSN

1552-9924

ISSN

0091-6765

Publication Date

April 2017

Volume

125

Issue

4

Start / End Page

594 / 601

Related Subject Headings

  • United States
  • Toxicology
  • Risk Assessment
  • Respiratory Tract Diseases
  • Particulate Matter
  • Hospitalization
  • Environmental Exposure
  • Cardiovascular Diseases
  • Air Pollution
  • Air Pollutants