Table 2

Baseline Characteristics of the Propensity-Matched Cohort of Patients Treated With ACIS Versus Those Treated With Manual Contrast Injection

VariableACIS Frequency (n = 9,600)Manual Injection Frequency (n = 9,600)Standardized Difference
Age 60–69 yrs28.8281.77
Age 70–79 yrs24.624.7−0.23
Age 80+ yrs11.412.1−2.17
Female32.931.92.14
Overweight35.335.9−1.25
Obese47.645.05.22
Current smoking28.529.8−2.86
Creatinine clearance 60–8930.029.70.66
Creatinine clearance 30–5918.118.9−2.06
Creatinine clearance <301.91.90
Hypertension83.783.21.35
MI32.932.90
Diabetes mellitus33.533.52.13
Congestive heart failure14.415.5−3.09
Extracardiac vascular disease26.126.8−1.59
Significant valve disease2.83.1−1.77
Chronic renal failure on dialysis1.71.9−1.5
Gastrointestinal bleeding1.41.5−0.84
Atrial fibrillation9.911.2−4.23
Cardiac arrest1.61.401.65
History of prior PCI41.741.40.61
Prior CABG18.719.6−2.29
Chronic obstructive pulmonary disease16.315.81.36
MI present (<7 days prior)31.732.2−1.07
Acute MI (<24 h prior)19.719.40.76
Cardiogenic shock2.302.02.07
Cardiac arrest1.71.60.79
Ventricular tachycardia/fibrillation1.21.3−0.9
Emergent PCI14.213.61.73
Baseline creatinine ≥1.5 mg/dl11.211.20
Anemia25.926.8−2.04
Ejection fraction <50%28.728.21.11

Values are %.

Abbreviations as in Table 1.