Table 4.

Correlation of HRR Level Measures of Intensive Treatment, Medical Management, Support of Medical Treatment and Demographic Characteristics

HRR indicator	Mean	SD	10th percentile	90th percentile	Correlation with HRR CATH rate
Measures of intensive treatment
Risk-adjusted 30-day CATH rate	46.3%	9.1%	34.5%	58.3%	1.00
Risk-adjusted 30-day PTCA rate	17.7%	5.1%	11.3%	23.6%	0.81
Risk-adjusted 30-day CABG rate	13.4%	2.9%	10.2%	16.9%	0.51
Risk-adjusted 12-hour PTCA rate	2.7%	2.6%	0.6%	5.8%	0.52
Measures of Quality of medical management
Risk-adjusted β-blocker rate	45.6%	9.5%	34.2%	58.3%	−0.31
Support for intensive treatment
Cardiovascular Surgeons per 100,000	1.06	0.27	0.70	1.40	0.33
Cath Labs per 10,000	2.40	0.76	1.50	3.30	0.39
Demographic characteristics
log of resident population	13.96	0.89	12.72	15.18	−0.05
log of per capita income	9.55	0.20	9.31	9.85	0.02
Percent College graduates	19.3%	5.5%	13.1%	26.6%	−0.05

Notes: HRR surgical and medical intensity rates are computed as the risk-adjusted fixed effects from a patient level regression the receipt of CATH or beta-blockers on HRR fixed effects and CCP risk-adjusters. CATH propensity is an empirical measure of patient appropriateness for intensive treatments. We define this measure by using fitted values from a logit model of the receipt of cardiac catheterization on all the CCP risk-adjusters.