Identification of racial disparities in breast cancer mortality: does scale matter?

Table 5 Number of geographical units at various levels of aggregation with significant disparities in breast cancer mortality for Hispanic women.

Poverty Level		High SES (0-9.99%)	Middle SES (10.00-19.99%)	Low SES (≥20.00%)	Total
Census Tract (4388)	RD¹ < 0	0	0	2	2
	RD > 0	20	46	266	328
	RD² < 1	0	0	0	0
	RR > 1	0	0	0	0
Zip Code (2884)	RD < 0	0	0	0	0
	RD > 0	11	9	42	62
	RR < 1	0	0	0	0
	RR > 1	0	0	0	0
County (254)	RD < 0	0	1	0	1
	RD > 0	0	0	3	3
	RR < 1	0	1	0	1
	RR > 1	0	0	0	0

¹The rate difference (RD) measurement is an absolute measure of breast cancer mortality rates for Hispanic women compared to the Whites.
²The rate ratio (RR) measurement is a relative measure of breast cancer mortality rates for Hispanic women compared to the Whites.
Units are classified according to their socioeconomic status (SES) as measured by the percentage of the population below the poverty threshold.

ISSN: 1476-072X