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Table 2 Characteristics of the electrocardiogram for patients who come to the emergency department with acute chest pain, due to acute coronary syndrome (ACS; n = 130) or other causes (n = 504). I-STamp, ST amplitude in lead I; aVF-STamp, ST amplitude in lead aVF; V2-STamp, ST amplitude in lead V2; STamp38, ST amplitude at the end of the third out of eight equal intervals between the ST-J point and the end of the T wave.

From: A simple statistical model for prediction of acute coronary syndrome in chest pain patients in the emergency department

  ACS n (%) Other causes n (%) OR 95% CI
I-Stamp     
   I-STamp > 50 and I-STamp38 > I-STamp 7 (5.4) 12 (2.4) 2.4 0.94 – 6.3
   I-STamp < -100 and I-STamp38 < I-STamp 7 (5.4) 6 (1.2) 4.9 1.6 – 15
   None of above 116 (89.2) 486 (96.4) 1.0 -
aVF-STampa     
   aVF-STamp > 100 and aVF-STamp38 > aVF-STamp 13 (10.1) 4 (0.8) 14 4.6 – 45
   aVF-STamp < -100 and aVF-STamp38 < aVF-STamp 4 (3.1) 3 (0.6) 5.9 1.3 – 27
   None of above 112 (86.8) 497 (98.6) 1.0 -
V2-STampb     
   V2-STamp > 200 and V2-STamp38 > V2-STamp 17 (13.2) 27 (5.4) 3.0 1.5 – 5.7
   100 < V2-STamp ≤ 200 and V2-STamp38 > V2-STamp 26 (20.2) 95 (18.9) 1.3 0.78 – 2.1
   V2-STamp < -100 and V2-STamp38 < V2-STamp 6 (4.7) 5 (1.0) 5.6 1.7 – 19
   None of above 80 (62.0) 376 (74.8) 1.0 -
  1. a One patient with ACS had missing value on aVF-STamp.
  2. b Two patients (one with and one without ACS) had missing value on V2-STamp.