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. Author manuscript; available in PMC: 2019 Feb 20.
Published in final edited form as: J Expo Sci Environ Epidemiol. 2018 Jun 19;29(2):267–277. doi: 10.1038/s41370-018-0048-7

Figure 2.

Figure 2

Rate ratios and 95% confidence intervals from cubic spline C-R models. Rate ratios use O3 of 20 ppb as reference.a The best fitting model across all six O3 modeling approaches, as determined by AIC, is also listed on each figure for comparison purposes.

a20 ppb and 60 ppb correspond to 10th and 90th O3 percent