Table 3. Case-Mix Correlations.

	MCD	WI	INT	BEDS	SCV	MCV	LCV
CMI	.60	.43	.36	.54	.07	.16	.29

CMI—Medicare case-mix index

MCD—Medicare average inpatient operating cost per discharge

Wl—Wage index

INT—Number of interns and residents per bed

BEDS—Hospital bed size

SCV—Urban area (SMSA or NECMA), population less than 250,000

MCV—Urban area, population 250,000 to 1,000,000

LCV—Urban area, population over 1,000,000

Number of observations = 5,071