Examples of a Likely Cluster of Breast Cancer Mortality Rates in the US

This image includes a map of age-adjusted breast cancer mortality rates for white females, 1988-1992, in the US. The northeastern section of the US is highlighted to identify the most likely cluster. It identified a circular cluster, an elliptical cluster with an axis ratio = 2, and an elliptical cluster with an axis ratio = 5.

Source

Pickle et al. Atlas of United States Mortality, NCHS, 1996.