Electrocardiographic ST-segment depression and exposure to traffic-related aerosols in elderly subjects with coronary artery disease.

In addition, the relative rate of ST-segment depression was significantly positive for 2-day averages of quasi-ultrafine (PM 0.25 ) mass [rate ratio (RR) = 1.57; 95% CI, 1.19–2.06] and borderline significant for 1-day averages (RR = 1.17; 95% CI, 0.99–1.40), but not for larger particle size fractions (2-day average PM 0.25–2.5 : RR = 1.17; 95% CI, 0.70–1.95; 2-day average PM 2.5–10 : RR = 1.25; 95% CI, 0.94–1.67) (see Supplemental Material, Table 1 and Figure 1 (doi:10.1289/ehp.1002372)].

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