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Health Place. 2003 Sep;9(3):273-7.

Visualization of the spatial scan statistic using nested circles.

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SEER Program, National Cancer Institute, Bethesda, Maryland, MD, USA.


We propose a technique for the display of results of Kulldorff's spatial scan statistic and related cluster detection methods that provides a greater degree of informational content. By simultaneously considering likelihood ratio and relative risk, it is possible to identify focused sub-clusters of higher (or lower) relative risk among broader regional excesses or deficits. The result is a map with a nested or contoured appearance. Here the technique is applied to prostate cancer mortality data in counties within the contiguous United States during the period 1970-1994. The resulting map shows both broad and localized patterns of excess and deficit, which complements a choropleth map of the same data.

[Indexed for MEDLINE]

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