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Amyotrophic Lateral Sclerosis and Frontotemporal Degeneration Volume 18, 2017 - Issue 3-4
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Original Article

Geographic distributions of motor neuron disease mortality and well water use in U.S. counties

Gary G. SchwartzDepartment of Population Health, University of North Dakota School of Medicine & Health Sciences, Grand Forks, ND, USA and Correspondence[email protected]
,
Bradley C. RundquistDepartment of Geography, University of North Dakota College of Arts and Sciences, Grand Forks, ND, USA
,
Isaac J. SimonDepartment of Geography, University of North Dakota College of Arts and Sciences, Grand Forks, ND, USA
&
Sami E. SwartzDepartment of Geography, University of North Dakota College of Arts and Sciences, Grand Forks, ND, USA
Pages 279-283 | Received 13 Sep 2016, Accepted 11 Nov 2016, Published online: 25 Dec 2016

Figures & data

Figure 1. Flow chart showing the initial data set and exclusions from it.

Figure 1. Flow chart showing the initial data set and exclusions from it.

Figure 2. Panel 2a. Scatterplot of MND mortality rates vs. well water prevalence for 923 U.S. counties. Panel 2b. “Hot” and “cold” spots for MND mortality rates. Counties at the 90th, 95th, and 99th percentile of the distribution of low and high MND mortality rates are shown in shades of blue and red, respectively. Panel 2c. “Hot” and “cold” spots for well water use. Counties at the 90th, 95th, and 99th percentile of the distribution of low and high well water use are shown in shades of blue and red, respectively.

Figure 2. Panel 2a. Scatterplot of MND mortality rates vs. well water prevalence for 923 U.S. counties. Panel 2b. “Hot” and “cold” spots for MND mortality rates. Counties at the 90th, 95th, and 99th percentile of the distribution of low and high MND mortality rates are shown in shades of blue and red, respectively. Panel 2c. “Hot” and “cold” spots for well water use. Counties at the 90th, 95th, and 99th percentile of the distribution of low and high well water use are shown in shades of blue and red, respectively.

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