Figure 5From: Geographical clustering of prostate cancer grade and stage at diagnosis, before and after adjustment for risk factorsObserved vs. expected block group rates of later stage at diagnosis, and significant clusters. Proportion of prostate cancer cases with stage of disease at diagnosis of 2 to 7, compared to proportion expected based on overall Maryland rate, Maryland Cancer Registry, 1992–1997, N = 19223. A spatial scan statistic was used to identify non-overlapping clusters of statistically significant high or low rates (table 4).Back to article page