NDLI: What is the impact of systematically missing exposure data on air pollution health effect estimates?

Content Provider	Springer Nature Link
Author	Samoli, Evangelia Peng, Roger D. Ramsay, Tim Touloumi, Giota Dominici, Francesca Atkinson, Richard W. Zabetti, Antonella Tertre, Alain Anderson, H. Ross Schwartz, Joel Cohen, Aaron Krewski, Daniel Samet, Jonathan M. Katsouyanni, Klea
Copyright Year	2014
Abstract	Time-series studies reporting associations between daily air pollution and health use pollution data from monitoring stations that vary in the frequency of recording. Within the Air Pollution and Health: A European and North American Approach (APHENA) project, we evaluated the impact of systematically missing daily measurements on the estimated effects of PM$_{10}$ and ozone on daily mortality. For four cities with complete time-series data, we created patterns of systematically missing exposure measurements by deleting observations. Poisson regression-derived city-specific estimates were combined to produce overall effect estimates. Analyses based on incomplete time series gave considerably lower pooled PM$_{10}$ and ozone health effects compared to those from complete data. City-specific estimates were generally lower although more variable. Systematically missing exposure data for air pollutants appears to lead to underestimation of associated health effects. Our findings indicate that the use of evidence from studies with incomplete exposure data may underestimate the impact of air pollution and highlight the advantage of having complete daily data in time-series studies.
Starting Page	415
Ending Page	420
Page Count	6
File Format	PDF
ISSN	18739318
Journal	Air Quality, Atmosphere & Health
Volume Number	7
Issue Number	4
e-ISSN	18739326
Language	English
Publisher	Springer Netherlands
Publisher Date	2014-03-09
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Air pollution Monitoring Short-term effects Systematically missing Time-series analysis Environmental Health Atmospheric Protection/Air Quality Control/Air Pollution Health Promotion and Disease Prevention
Content Type	Text
Resource Type	Article
Subject	Pollution Health, Toxicology and Mutagenesis Atmospheric Science Management, Monitoring, Policy and Law

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1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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