|
Cluster Analysis of Higher Grade* Prostate Cancer Cases – Maryland Cancer Registry, 1992–1997 |
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| Radius (km) |
# Block groups in Cluster |
# Higher Grade Cases Expected |
# Higher Grade Cases Observed |
Relative Risk |
P Value |
|
|
|
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| Map 2. Unadjusted Analysis |
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| Cluster 1 |
5.99 |
550 |
522.5 |
669 |
1.28 |
.001 |
| Cluster 2 |
44.93 |
201 |
305.3 |
210 |
0.69 |
.001 |
| Cluster 3 |
10.34 |
173 |
253.9 |
176 |
0.69 |
.004 |
| Cluster 4 |
5.93 |
38 |
93.8 |
49 |
0.52 |
.017 |
| Map 3. Adjusted Analysis ** |
||||||
| Cluster 1 |
14.81 |
292 |
487.3 |
362 |
0.74 |
.001 |
| Cluster 2 |
54.65 |
162 |
247.6 |
164 |
0.66 |
.003 |
| Cluster 3 |
8.27 |
80 |
99.6 |
156 |
1.56 |
.013 |
| Map 4. Adjusted Analysis *** |
||||||
| Cluster 1 |
6.02 |
554 |
444.0 |
643 |
1.45 |
.001 |
| Cluster 2 |
48.62 |
1181 |
1825.4 |
1587 |
0.87 |
.001 |
| Cluster 3 |
30.88 |
99 |
155.8 |
94 |
0.60 |
.004 |
|
* Among cases with a histologic grade, those cases graded as 3 or 4 vs. 1 or 2. ** Expected Rate Adjusted for Race, Age, Year of Diagnosis. *** Expected Rate Adjusted for Age, Race, Year of Diagnosis, and Area-Level Census Characteristics. | ||||||
Klassen et al. International Journal of Health Geographics 2005 4:1 doi:10.1186/1476-072X-4-1 |
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