Comparison of 1-day lag NO₂ concentration effects in subgroups defined by age and type of AMI.

<p>AGECAT1 = age <65; AGECAT2 = age ≥65; STEMI = ST Segment Elevation Myocardial Infarction; NSTEMI = Non-ST Segment Elevation Myocardial Infarction. OR estimates calculated by bootstrap model averaging of 1000 replications for an inter-quintile range increase of NO2_AVE (28.2 μg/m³), NO2_AVE12 (30.1 μg/m³), NO2_AVE6 (34.2 μg/m³), NO2_MIN (16.9 μg/m³), NO2_MAX (39.5 μg/m³). Freq represents frequency that a variable had p-value ≤0.05 from 1,000 model replications.