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Table 1 Baseline characteristics of 1029 patients presenting with acute coronary syndrome (ACS)

From: Hospital laboratory reporting may be a barrier to detection of ‘microsize’ myocardial infarction in the US: an observational study

  ACS without MI Microsize MI Usual MI P-value
  Tn* < ULN ULN ≤ Tn < 5×ULN Tn ≥ 5×ULN
  (n = 493) (n = 183) (n = 353)  
Age ≥ 65 years,% 62.3 68.3 66.9 0.73
Black Race,% 39.8 38.3 28.6 0.03
Female Gender,% 50.9 37.7 32.3 0.21
Obese,% 49.1 40.4 33.4 0.11
Hypertension,% 81.1 76.0 73.7 0.56
Diabetes,% 36.7 39.9 32.0 0.07
History of Heart Disease,% 46.7 48.6 38.8 0.03
Triglyceride ≥200 mg/dl,% 18.5 20.8 20.7 0.99
High Density Lipoprotein Cholesterol ≤40 mg/dl,% 33.5 33.3 41.4 0.07
Low Density Lipoprotein Cholesterol ≥160 mg/dl,% 7.5 5.5 9.9 0.08
Mean creatinine, mg/dL (SD) 1.0 (0.4) 1.0 (0.5) 1.2 (1.1) 0.03
Framingham CHD Risk score, Mean (SD) 12.6 (11.3) 14.1 (9.6) 16.5 (12.7) 0.07
  1. *Tn = Troponin, ULN = Upper Limit of Normal, MI = Myocardial Infarction.
  2. Chi-square test for categorical variables and student t-test for continuous variables used to test differences between microsize and usual MI groups. See text for definition of medical conditions. Bold italicized characteristics differed statistically between microsize and usual MI groups.