Table 5. C-statistics.

	Functional Model	Functional-Plus models			Demographic-comorbidity models
	Demo + FIM	Func + Deyo	Func + Elixhauser	Func + CMS Tiers	Demo + Deyo	Demo + Elixhauser	Demo +  CMS Tiers
3 days	0.703	0.705	0.703	0.708	0.607	0.606	0.637
30 days	0.654	0.658	0.656	0.664	0.598	0.601	0.625