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Table 1 Patient characteristics

From: Ambient fine particulate air pollution triggers ST-elevation myocardial infarction, but not non-ST elevation myocardial infarction: a case-crossover study

Characteristic STEMI NSTEMI
  N = 338 % N = 339 %
Age     
 <50 years 58 17% 58 17%
 50-59 years 106 31% 94 28%
 60-69 years 92 27% 80 24%
 70-79 years 46 14% 54 16%
 ≥ 80 years 34 10% 53 15%
 Missing age 2 1% 0 0%
Male 224 66% 229 68%
Race     
 White 207* 87% 240** 86%
 Black 27 11% 33 12%
 Other 4 2% 7 3%
Clinical presentation (may have more than 1)     
Study subjects with data on ACS presentation 241 71%* 280 83%**
 Prior myocardial infarction 54 22% 75 27%
 Prior PCI 45 19% 56 20%
 Prior CABG 10 4% 33 12%
 CVD (“Stroke” in 07–08, “CVD” in 09–10) 12 5% 31 11%
 Prior PAD 16 7% 25 9%
 Smoking 156 65% 87 31%
 Hypertension 160 66% 176 63%
 Dyslipidemia 143 59% 199 71%
 Diabetes 44 18% 65 23%
 Prior HF 6 2% 26 9%
BMI     
 Overweight (25 kg/m2 < = BMI <30 kg/m2) 99 41% 86 31%
 Obesity ( BMI ≥30 kg/m2) 52 22% 80 29%
 Severe obesity (BMI ≥35 kg/m2) 28 12% 42 15%
 Mean ± STD 28 ± 5   30 ± 12  
Left ventricular ejection fraction     
 ≤35% 48 20% 54 19%
 ≤45% 98 41% 110 39%
 Mean ± STD 43 ± 14   45 ± 14  
  1. *STEMI: Total n = 238 with race/ethnicity information. There were n = 100 (30% of n = 338) with missing race/ethnicity.
  2. **NSTEMI: Total n = 280 with race/ethnicity information. There were n = 59 (17% of n = 339) with missing race/ethnicity.