Table 1.

Mean Dissimilarity and Isolation Index, and Numbers of Markets Categorized with Low, Medium, and High Segregation by the Dissimilarity and Isolation Index, Overall and by Region of the Country

		Region of the Country
	Overall	Midwest	Northeast	South	West
Number of markets	105	19	16	62	8
Hospital Dissimilarity category
Low	35 (33%)	2 (10%)	2 (12%)	31 (50%)	0 (0%)
Medium	35 (33%)	3 (16%)	7 (44%)	22 (35%)	3 (38%)
High	35 (33%)	14 (74%)	7 (44%)	9 (15%)	5 (62%)
Mean Dissimilarity (SD)	0.37 (0.15)	0.53 (0.15)	0.40 (0.12)	0.30 (012)	0.47 (0.11)
Hospital Isolation category
Low	35 (33%)	5 (26%)	9 (56%)	18 (29%)	3 (37%)
Medium	35 (33%)	6 (32%)	3 (19%)	23 (37%)	3 (37%)
High	35 (33%)	8 (42%)	4 (25%)	21 (34%)	2 (25%)
Mean Isolation (SD)	0.22 (0.14)	0.29 (0.20)	0.19 (0.16)	0.22 (0.11)	0.21 (0.12)