Table 2 Patient characteristics

Age (years; median, interquartile range)

56 (48–66)

Male (%)

61.6

Risk factors (%)

Hypertension

54.1

Hypercholesterolemia

53

Smoking history

67.6

Diabetes mellitus

18.9

Family history

97

Medications on arrival to hospital (%)

Aspirin within last 7 days

42.7

Beta-blockers

45.5

Angiotensin-converting enzyme inhibitors/angiotensin receptor blockers

37

Statins

52.3

Clinical findings on admission

Heart rate (median, interquartile range)

73 (64–88)

Systolic blood pressure (median, interquartile range)

140 (126–155)

Signs of heart failure (%)

8.9

New ST segment depression or T wave inversion (%)

14.2

Troponin I > 0.04 ng/ml (%)

11

Results of previous investigations

Left ventricular ejection fraction < 40%

2.8

Previous coronary artery disease with known > 50% stenosis (%)

20.9

Prior history of revascularization (%)

Percutaneous coronary intervention (%)

16

Coronary artery bypass graft (%)

10.7