Table 1. A Summary of Hospital Charteristics.

Hospital Characteristic	Range	Median
Hospital size	25–1,280	421
Operative volume	192–24,258	6,341
ICU cases	0 - 53%	17%
SCIP*	0–100%	25%
Length of stay	2.92–8.97	5.32
Length of stay index	0.67–1.44	0.98
PSI**	7–100%	36%
Early mortality rate	0–3.43%	0.39%
Complication rate	0–8.78%	4.15%
Readmission rate	3.37–23.25%	10.72%
Mortality rate	0–9.89%	1.24%
Mortality index	0–2.61	0.83

^*SCIP measures were grouped as percentage of all process measures for which hospital had 100% compliance.

^**PSIs were grouped as percentage of all PSIs for which the hospital had zero events.