Wombling Analysis of Childhood Tumor Rates in Florida

Figures & data

Figure 1. Percentage of total cancer cases within each ZCTA for (a) African American, (b) Caucasian, (c) other, and (d) unknown race.

Figure 2. Spatial log relative risks ρ_z∣r for (a) African American, (b) Caucasian, (c) Other, and (d) unknown race. The black solid lines indicate a wombling boundary (i.e., regions of high rates of change).

Table 1. ZCTA number for the 10 largest posterior means of ρ_z∣r by race

	Race
Rank	African American	Caucasian	Other	Unknown
1	32,447	32,438	32,814	33,109
2	32,616	32,058	32,686	32,461
3	33,039	32,040	32,827	32,664
4	32,697	33,935	34,669	33,170
5	33,136	32,784	32,204	33,136
6	33,170	33,028	32,714	33,014
7	32,805	33,109	32,934	33,174
8	33,404	32,148	34,956	33,607
9	32,399	32,680	33,544	33,166
10	32,254	32,461	33,331	33,016

Table 2. Posterior summary of the coefficients β₁ (median income; MI), β₂ (percent in poverty; PP), and β₃ (percent of homes built prior to 1990; <1990) for each race

	Race
	African American		Caucasian		Unknown
Covariate (hi)	Mean	95% CI	Mean	95% CI	Mean	95% CI
MI	−0.009	(−0.024, 0.006)	0.003	(−0.002, 0.008)	0.042	(0.024, 0.062)
PP	0.052	(0.030, 0.072)	−0.006	(−0.015, 0.004)	0.052	(0.011, 0.094)
<1990	0.005	(−0.003, 0.013)	−0.001	(−0.003, 0.002)	0.016	(0.003, 0.030)

NOTE: Results for the “other” race category were omitted because the data did not contain enough information to estimate these parameters (95% credible interval widths were very large).

Figure 3. Posterior distribution of the temporal intensity of cancer cases () for y ∈ {2000, …, 2010}. The dashed lines are 95% credible interval limits. The vertical dotted line indicates a wombling boundary between 2005 and 2006.

Figure 4. Posterior distribution of the age intensity of cancer cases () for (a) African American (b) Caucasian, (c) “other,” and (d) unknown race. The dashed lines are 95% credible interval limits. The vertical dotted lines indicate wombling boundaries.

Table 3. Posterior mean of gender intensity ()

	Race
	African	Caucasian	Other	Unknown
Gender	American (0.17)	(0.73)	(0.02)	(0.09)
Female	0.45	0.46	0.51	0.47
Male	0.55	0.54	0.49	0.53

NOTE: Numbers next to the race category indicate the posterior mean of the race intensity .