The Annals of Applied Statistics

Modeling the effect of temperature on ozone-related mortality

Ander Wilson, Ana G. Rappold, Lucas M. Neas, and Brian J. Reich

Full-text: Open access

Abstract

Climate change is expected to alter the distribution of ambient ozone levels and temperatures which, in turn, may impact public health. Much research has focused on the effect of short-term ozone exposures on mortality and morbidity while controlling for temperature as a confounder, but less is known about the joint effects of ozone and temperature. The extent of the health effects of changing ozone levels and temperatures will depend on whether these effects are additive or synergistic. In this paper we propose a spatial, semi-parametric model to estimate the joint ozone-temperature risk surfaces in 95 US urban areas. Our methodology restricts the ozone-temperature risk surfaces to be monotone in ozone and allows for both nonadditive and nonlinear effects of ozone and temperature. We use data from the National Mortality and Morbidity Air Pollution Study (NMMAPS) and show that the proposed model fits the data better than additive linear and nonlinear models. We then examine the synergistic effect of ozone and temperature both nationally and locally and find evidence of a nonlinear ozone effect and an ozone-temperature interaction at higher temperatures and ozone concentrations.

Article information

Source
Ann. Appl. Stat., Volume 8, Number 3 (2014), 1728-1749.

Dates
First available in Project Euclid: 23 October 2014

Permanent link to this document
https://projecteuclid.org/euclid.aoas/1414091232

Digital Object Identifier
doi:10.1214/14-AOAS754

Mathematical Reviews number (MathSciNet)
MR3271351

Zentralblatt MATH identifier
1304.62140

Keywords
Air pollution monotone regression mortality ozone-temperature interaction semi-parametric regression spatial modeling

Citation

Wilson, Ander; Rappold, Ana G.; Neas, Lucas M.; Reich, Brian J. Modeling the effect of temperature on ozone-related mortality. Ann. Appl. Stat. 8 (2014), no. 3, 1728--1749. doi:10.1214/14-AOAS754. https://projecteuclid.org/euclid.aoas/1414091232


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Supplemental materials

  • Supplementary material: Appendices. Appendices referenced in the text are provided in the supplementary appendix file [Wilson et al. (2014)]. Appendix A: additional figures. Appendix B: cross-validation results. Appendix C: full conditional distributions. Appendix D: MCMC algorithm. Appendix E: trace plots.