Variable

Value or Frequency (n = 931)

Age (yrs) (median, IQR)

65 (56-75)

Age > 75

23.6%

Caucasian

92.5%

Male

68.1%

Diabetes mellitus

37.9%

Hypertension

83.7%

Hyperlipidemia

77.7%

Smoking history

52.2%

Congestive heart failure

11.1%

Hypotension

1.3%

Previous myocardial infarction

30.8%

Previous CABG

24.4%

Peripheral vascular disease

13.1%

Previous angioplasty

37.6%

Hematocrit (%) (median, IQR)

40 (37-43)

Anemia

26.9%

Baseline serum Cr (mg/dl) (median, IQR)

     < 1.5

     1.5-2.0

     > 2.0

1.0 (0.9-1.2)

85.5%

11.7%

2.8%

Baseline eGFR (ml/min 1.73 m²) (median, IQR)

     > 60

     40-60

     20-40

     < 20

73 (57-89)

 69.8%

20.8%

9.1%

0.2%

Multivessel coronary artery disease

60.6%

Multivessel PCI

23.7%

Treated saphenous vein graft

7.0%

Intra-aortic balloon pump

1.3%

Contrast volume (ml) (median, IQR)

193 (135-258)

Contrast volume > 150 ml

67.1%

Pre-treated with intravenous sodium bicarbonate

3.4%

Pre-treated with N-acetycysteine

15.2%