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. 2019 Aug 26;127(8):087009. doi: 10.1289/EHP4883

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EHP is an open-access journal published with support from the National Institute of Environmental Health Sciences, National Institutes of Health. All content is public domain unless otherwise noted.

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Figure 4A is a line graph plotting hazard ratio (y-axis) across concentrations of PM sub 2.5 (micrograms per cubic meter; x-axis). Figure 4B is a line graph plotting hazard ratio (y-axis) across concentrations of oxidant capacity (parts per billion; x-axis). — Shapes of the concentration–response relationships between stroke, ${PM}_{2.5}$ and $O_{x}$ . Gray area represents the 95% confidence interval (CI). Fully adjusted model, stratified by an indicator for living in the Greater Toronto Area or not, and adjusted for age, sex, area-level socioeconomic status (education, recent immigrants, unemployment rate, and income quintile), urban/rural area, and northern/southern Ontario.