Table 3.
Number of ACS Events and Adjusted ORs (and 95% CIs) Associated With a 10‐μg/m3 Increase in Concurrent‐Day PM2.5 Concentration for Nonthreshold and Threshold Models
| Event | No. of Eventsa | OR (95% CI) per 10 μg/m3, >0 μg/m3 | OR (95% CI) per 10 μg/m3, >25 μg/m3 |
|---|---|---|---|
| All events | 16 148 | 1.02 (1.00–1.05)c | 1.05 (1.01–1.09)e |
| All, with CADb | 12 290 | 1.03 (1.00–1.06)d | 1.06 (1.02–1.11)e |
| All, without CAD | 3858 | 1.00 (0.96–1.05) | 1.00 (0.93–1.08) |
| STEMI, All | 1262 | 1.08 (1.01–1.16)d | 1.13 (1.01–1.26)d |
| STEMI, with CAD | 1196 | 1.09 (1.01–1.17)d | 1.15 (1.03–1.29)d |
| STEMI, without CAD | 66 | 0.95 (0.66–1.35) | 0.68 (0.32–1.41) |
| NSTEMI, All | 9418 | 1.00 (0.97–1.03) | 1.01 (0.96–1.06) |
| NSTEMI, with CAD | 7032 | 1.00 (0.96–1.03) | 1.02 (0.97–1.08) |
| NSTEMI, without CAD | 2386 | 1.01 (0.95–1.07) | 0.98 (0.89–1.08) |
| UA, All | 5468 | 1.04 (1.00–1.09)d | 1.09 (1.02–1.16)e |
| UA, with CAD | 4062 | 1.06 (1.01–1.11)d | 1.09 (1.02–1.17)d |
| UA, without CAD | 1406 | 1.00 (0.92–1.09) | 1.08 (0.94–1.23) |
| NSTE‐ACS, All | 14 886 | 1.02 (0.99–1.04) | 1.04 (1.00–1.08)c |
| NSTE‐ACS, with CAD | 11 094 | 1.02 (0.99–1.05) | 1.05 (1.00–1.10)d |
| NSTE‐ACS, without CAD | 3792 | 1.01 (0.96–1.06) | 1.01 (0.93–1.09) |
ACS indicates acute coronary syndrome; CAD, coronary artery disease; NSTE‐ACS, non–ST‐segment elevation ACS; NSTEMI, non–ST‐segment elevation myocardial infarction; OR, odds ratio; PM2.5, fine particulate matter ≤2.5 μm in aerodynamic diameter; STEMI, ST‐segment elevation myocardial infarction; UA, unstable angina.
The number of events used in each of the conditional logistic regressions may be slightly smaller than the total available, as presented in Table 2, because of missing air pollution or weather data.
CAD indicates seriously diseased coronary vessels, defined as ≥1 coronary artery with ≥70% maximal stenosis as determined at angiography.
P<0.10.
P<0.05.
P<0.01.