Table 1 Characteristics and outcomes for study patients

Age, median (IQR) years

82 (77–85)

82 (78–85)

81 (68–88)

0.38

Male sex

253 (53)

77 (61)

175 (50)

0.04

Medical history

Hypertension

279 (59)

79 (62)

200 (57)

0.33

Hyperlipidemia and/or use of statins

230 (48)

63 (50)

167 (48)

0.72

Diabetes

116 (24)

38 (30)

78 (22)

0.09

CAD

281 (59)

74 (58)

207 (59)

0.86

Prior PCI

130 (27)

34 (27)

96 (27)

0.89

Prior CABG

94 (20)

23 (18)

71 (20)

0.60

Stroke

86 (18)

24 (19)

62 (18)

0.77

CHF

90 (19)

27 (21)

63 (18)

0.40

Smoking status

Current

32 (6.7)

10 (8.4)

21 (6.1)

0.70

Current medication

Warfarin

87 (18)

11 (9)

76 (22)

<0.01

Findings on presentation

Heart rate (beats/min)

77

80

76

0.08

Systolic blood pressure (mmHg)

150

150

147

0.20

Diastolic blood pressure (mmHg)

80

80

80

0.04

ECG

ST depression

53 (11)

32 (25)

21 (6)

<0.01

ST elevation

13 (3)

5 (4)

8 (2)

0.33

T-Wave inversion

21 (4)

9 (7)

12 (3)

0.09

Left bundle branch block

7 (1)

3 (2)

4 (1)

0.33

Right bundle branch block

3 (1)

0

3 (1)

0.30

Non interpretable ECG (pacemaker)

44 (9)

14 (11)

30 (9)

0.41

Laboratory tests

CRP (mg/L)

2.9

2.8

2.9

0.73

Creatinine (μmol/L)

94

99

92

0.04

Cholesterol (mmol/L)

4.2

4.2

4.1

0.69

Troponin at presentation median (IQR)

20 (11–37)

37 (19–116)

17 (8–28)

<0.01

Troponin positive at presentation

297 (63)

100 (81)

197 (58)

<0.01

Abs diff T0T3

2 (1–7)

18 (4–67)

2 (0–4)

<0.01

GRACE score median (IQR)

142 (125–164)

150 (128–177)

140 (124–156)

0.01

In-hospital outcome

Coronary angiography

104 (22)

83 (65)

21 (6)

<0.01

PCI

39 (8)

39 (8)

0

<0.01

CABG

27 (6)

27 (6)

0

<0.01

Death

13 (3)

7 (6)

6 (2)

0.02