Table 3.

Risk prediction score for the development of contrast-induced nephropathy and renal failure requiring dialysis35

Risk factors		Integer score
Hypotensiona		5 points
Use of intra-aortic balloon pump		5 points
Congestive heart failureb		5 points
Age >75 years		4 points
Anemiac		3 points
Diabetes mellitus		3 points
Volume of contrast media		1 point for each 100 mL
SCr > 1.5 mg/dL		4 points
or
eGFRd < 60 mL/min/1.73 m2		2 points for 40–60
		4 points for 20–40
		6 points for <20
Risk assessment
Risk score	Risk of CIN	Risk of dialysis
<5 points	7.5%	0.04%
6–10 points	14%	0.12%
11–16 points	26.1%	1.09%
>16 points	57.3%	12.6%

Notes:

^aHypotension: systolic blood pressure <80 mmHg for at least one hour requiring inotropic support with medications or intra-aortic balloon pump within 24 hours periprocedurally;

^bcongestive heart failure (New York Heart Association functional class III/IV and/or history of pulmonary edema);

^canemia (baseline hematocrit value <39% for men and <36% for women);

^deGFR (mL/min/1.73 m²) = 186.3 × (sCrCIN)^−1.154 × (age)^−0.203 × (0.742 if female) × (1.210 if African-American).

Abbreviations: eGFR, estimated glomerular filtration rate; CIN, contrast-induced nephropathy; SCr, serum creatinine.