Table 4. Translation of the risk model into an integer score.

Variable	score
CHF/EF<30%	+2
LM/3VD	+1.5
S/P PCI	+2
S/P CVA	+2.5
Age>75 years	-3
Hb<10	-6
Total score range	-9 to 8

CHF = congestive heart failure, CVA = cerebrovascular accident, EF = ejection fraction, Hb = haemoglobin, LM = left main, PCI = percutaneous coronary intervention, S/P = status post, 3VD = triple vessel disease