This is a link to the supplemental material from the manuscript that includes all of the data and R code needed to replicate the analysis. This dataset is associated with the following publication: Coffman, E., R. Burnett, and J. Sacks. Quantitative Characterization of Uncertainty in the Concentration Response Relationship between Long-Term PM2.5 Exposure and Mortality at Low Concentrations. ENVIRONMENTAL SCIENCE & TECHNOLOGY. American Chemical Society, Washington, DC, USA, 54(16): 10191-10200, (2020).