Table 8. Differences in CABG and PCI Use in Association With County-level Physician Supply.

	CABG Within Three Months				PCI Within Three Months
	Hierarchical Model		FE Logit model		Hierarchical Model		FE Logit model
	Coefficient (95% CI)		Coefficient (95% CI)		Coefficient (95% CI)		Coefficient (95% CI)
Surgeons/Interventional Cardiologists Per Capita
First quintile	–	–	–	–	–	–	–	–
Second quintile	0.014c	(0.007–0.020)	0.015c	(0.005–0.026)	−0.001	(−0.007–0.004)	0.004	(−0.004–0.012)
Third quintile	0.017c	(0.010–0.024)	0.021c	(0.008–0.035)	0.005	(−0.001–0.011)	0.008a	(−0.001–0.017)
Fourth quintile	0.009b	(0.000–0.017)	0.017c	(0.005–0.029)	0.008b	(0.000–0.016)	0.012b	(0.002–0.022)
Fifth quintile	0.019c	(0.009–0.028)	0.033c	(0.018–0.049)	0.018c	(0.008–0.027)	0.023b	(0.004–0.041)
Interaction Effect
Black, first quintile	0.005	(−0.007–0.018)	−0.017b	(−0.034–0)	0.006	(−0.012–0.024)	0.01	(−0.002–0.023)
Black, second quintile	−0.015b	(−0.029–−0.001)	−0.024c	(−0.036–−0.013)	0.002	(−0.015–0.018)	0.005	(−0.015–0.025)
Black, third quintile	−0.019a	(−0.039–0.002)	−0.033c	(−0.047–−0.02)	−0.003	(−0.027–0.021)	−0.009a	(−0.019–0.001)
Black, fourth quintile	−0.008	(−0.031–0.014)	−0.023b	(−0.042–−0.003)	−0.020	(−0.045–0.006)	−0.013	(−0.036–0.009)
Black, fifth quintile	−0.012	(−0.039–0.015)	−0.016a	(−0.032–0.001)	−0.013	(−0.045–0.020)	−0.011	(−0.029–0.007)

^ap<0.1;

^bp<0.05;

^cp<0.01 (two-tailed tests).