Table 4:

Comparison of AUROC for models constructed using 2007 NSQIP PUF and models constructed using 2006 NSQIP PUF.

Model	Mortality AUROC	P-Value	Morbidity AUROC	P-Value
All Variables (2007)	0.907	Ref	0.767	Ref
All Variables (2006)	0.895	0.759	0.763	0.780