Table 1:

Baseline patient characteristics

CharacteristicTotal, no. (%)*
n = 796
Age, yr, mean ± SD63.8 ± 14.8
Male sex444 (55.8)
Coronary artery disease286 (36.0)
Congestive heart failure48 (6.0)
Hypertension411 (52.0)
Diabetes157 (20.0)
Arrhythmia on arrival
Atrial fibrillation/flutter103 (12.9)
Paced31 (3.9)
ECG
Normal315 (39.6)
Nonspecific ST–T wave changes207 (26.0)
Abnormal, but not diagnostic of ischemia209 (26.3)
Infarction or ischemia known to be old34 (4.3)
Infarction or ischemia not known to be old12 (1.5)
Uninterpretable13 (1.6)
Missing ECG interpretation4 (0.5)
Disposition and 30-day outcomes
Admitted to hospital71 (8.9)
Non–ST-elevation myocardial infarction28 (3.5)
Unstable angina32 (4.0)
Death6 (0.8)
  • Note: ECG = electrocardiogram, SD = standard deviation.

  • * Unless otherwise specified.

  • Diagnosis requires the patient to be on medication for these conditions.