Table 3.

Correlation of Quality Metrics within Condition

Metric	(1)	(2)	(3)	(4)	(5)	(6)	(7)	(8)
	AMI				HF
	Risk-Adj Survival	Risk-Adj Readm	Process of Care Z	Patient Survey Z	Risk-Adj Survival	Risk-Adj Readm	Process of Care Z	Patient Survey Z
Risk-Adjusted Survival	1.00 [2,890]				1.00 [4,023]
Risk-Adjusted Readmission	0.03 [2,322]	1.00 [2,322]			0.35 [3,904]	1.00 [3,904]
Process of Care Z-Score	0.24 [2,346]	−0.25 [2,214]	1.00 [2,398]		0.17 [3,607]	−0.15 [3,578]	1.00 [3,666]
Patient Survey Z-Score	−0.06 [2,799]	−0.26 [2,293]	0.18 [2,370]	1.00 [3,498]	−0.18 [3,447]	−0.36 [3,398]	0.01 [3,392]	1.00 [3,598]
Metric	Pneumonia				Hip/Knee Replacement
	Risk-Adj Survival	Risk-Adj Readm	Process of Care Z	Patient Survey Z	Risk-Adj Survival	Risk-Adj Readm	Process of Care Z	Patient Survey Z
Risk-Adjusted Survival	1.00 [4,325]
Risk-Adjusted Readmission	0.08 [4,264]	1.00 [4,264]				1.00 [2,632]
Process of Care Z-Score	0.08 [3,871]	−0.18 [3,847]	1.00 [3,920]
Patient Survey Z-Score	−0.03 [3,527]	−0.36 [3,503]	0.18 [3,512]	1.00 [3,610]		−0.23 [2,542]		1.00 [3,061]

Hospitals used to calculate correlation in brackets. All quality metrics are condition-specific except the patient survey, which is only available as an all-patient average. Correlations involving risk-adjusted survival and readmission are adjusted to account for measurement error (see Appendix Section C.3.2).