Spatial Analysis of County-Level Breast Cancer Mortality in Texas

Table 1

List of breast cancer mortality clusters using Discrete Poisson model at county level in Texas for the years 2000 to 2008.

Cluster	Observed cases	Expected Cases	RR	LLR	P value
(a) Without covariate adjustment
Most likely cluster	3388	2754.18	1.27	78.04	<0.001
Secondary cluster 1	496	319.35	1.57	42.43	<0.001
Secondary cluster 3	525	382.84	1.38	24.08	<0.001
Secondary cluster 4	1992	1775.27	1.13	13.84	<0.001
Secondary cluster 5	119	71.95	1.66	12.88	<0.001
Not significant cluster	52	33.23	1.57	4.52	0.654
(b) With adjustment of race/ethnic status of population
Most likely cluster	4550	3843.34	1.23	74.66	<0.001
Secondary cluster 1	476	363.25	1.32	16.21	<0.001
Not significant cluster	119	85.39	1.40	5.91	0.26
Not significant cluster	1209	1111.12	1.09	4.41	0.68
Not significant cluster	713	640.85	1.12	4.04	0.80
Not significant cluster	413	370.87	1.12	2.35	1.00

Abbreviations: RR, Relative risk; LLR, Log-likelihood ratio.