Table 2. Use of CABG and PCI in Selected Counties, By Race.

	CABG Within Three Months (%)			PCI Within Three Months (%)
County	White	Black	Difference	White	Black	Difference
Philadelphia	7.0	5.6	1.4c	12.3	13.4	−1.2b
Dauphin	10.0	8.4	1.6	20.0	19.9	0.1
Delaware	8.5	5.2	3.3c	13.3	11.2	2.1a
Allegheny	9.3	6.2	3.1c	17.1	15.1	2.1b
Chester	7.9	4.3	3.6b	15.9	16.2	−0.3
Beaver	9.5	5.3	4.3b	22.0	16.3	5.7b
Monroe	7.8	4.2	3.5c	15.1	13.6	1.5
Erie	12.0	2.5	9.4c	17.2	16.9	0.3
Mercer	7.1	6.4	0.7	15.7	15.4	0.3
Washington	11.1	10.2	0.9	20.9	18.5	2.4

^ap<0.1;

^bp<0.05;

^cp<0.01 (two-tailed tests).