Effect modification by environmental quality index on the short-term association between PM 2.5 and mortality Open Access

Wang, Tong (2015)

Permanent URL: https://etd.library.emory.edu/concern/etds/h989r3998?locale=en


Here we used the data obtained from US Environmental Protection Agency to examine association between PM2.5 and total non-accidental death risk and to evaluate the heterogeneity in PM2.5 mortality rate across different counties. We also evaluated whether county-level environmental quality index modifies the association between PM2.5 and total non-accidental death risk. This study included data of 433 US counties. Bayesian meta-regression was used to combine relative risks from 433 US counties from a national multisite time-series analysis. Among the five environment quality indexes to represent different domains (air, built environment, land, water, sociodemographic) considered, air quality and built environment were found to be significant effect modifiers on PM 2.5 health risks. The effect modification were robust after adjustment by other environmental quality indexes.

Table of Contents

Chapter I. 1

Introduction. 1

Chapter II. 11

Literature Review. 11

Chapter III. 12

Methods. 12

Chapter IV. 15

Results. 15

Chapter V. 17

Discussion. 17

Reference. 18

Appendix. 20

About this Master's Thesis

Rights statement
  • Permission granted by the author to include this thesis or dissertation in this repository. All rights reserved by the author. Please contact the author for information regarding the reproduction and use of this thesis or dissertation.
Subfield / Discipline
  • English
Research Field
Committee Chair / Thesis Advisor
Committee Members
Partnering Agencies
Last modified

Primary PDF

Supplemental Files