Stroke researchers from the Perelman School of Medicine at the University of Pennsylvania unveiled a map demonstrating geographic hotspots of increased stroke mortality across the U.S., among a series of stroke studies presented at the American Academy of Neurology’s 66th Annual Meeting in Philadelphia.

The research, published in Neurology, used spatial modeling to identify well-defined areas of the U.S. where stroke-related death rates were disproportionately high (hot spots) or low (cold spots). County death data from the 2010 Multiple Cause of Death data files (National Center for Health Statistics) were combined with 2010 Area Resource File demographic data. Stroke deaths were identified using previously described ICD-10 (I60-69) codes. Local tests of spatial autocorrelation (LISA statistic) were conducted in ArcGIS to identify locations where disproportionately high or low stroke death rates were clustered.

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