Map Details – Stroke Mortality Rates and Population Distribution, Non-Hispanic Whites, by County, Texas

Impact Statement

This map shows the percentages of Non-Hispanic whites in each county in Texas, and stroke mortality rates among Non-Hispanic whites. The map shows an overall pattern of higher stroke mortality rates among Non-Hispanic whites in regions with a higher percentage of Non-Hispanic Whites. This pattern indicates the need for prevention and intervention programs in those areas.

This map displays the county-level stroke mortality rates per 100,000 people and percentages of Non-Hispanic White population for the state of Texas, ages 35 and up, for the years 2014-2016 (mortality), and 2012-2017 (Non-Hispanic White population). Stroke mortality rates map: Counties in the top quintile (113.6 - 197.7) are located primarily in the northern and eastern parts of Texas. Counties in the lowest quintile (49.4 - 62.0) are in southern areas of western, central and southern Texas. Non-Hispanic White Population (percentage): Counties in the top quintile (77.6 - 92.3) of Non-Hispanic White population are in the northern, north central, and eastern parts of Texas. Counties in the lowest quintile (0.6 = 20.9) are in the western and southern areas of Texas.

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This map allows the readers to see a pattern in the dispersion of Non-Hispanic White populations and stroke mortality rates in the state of Texas: there is a denser population of Non-Hispanic whites and higher stroke mortality rates among Non-Hispanic whites in the northern, central, and eastern parts of Texas. Additionally, counties in the western and southern parts of Texas generally have smaller percentages of Non-Hispanic whites and lower stroke mortality rates among non-Hispanic whites.

ArcGIS

The data used for these maps are county-level stroke mortality rates (per 100,000) and county-level percentage of the Non-Hispanic White population. Stroke mortality rates for Non-Hispanic Whites for 35 years and older, both sexes, were calculated (2014-2016). Distribution of the Non-Hispanic White population in both sexes, are from the years 2012-2017. Data for both the maps were downloaded from the Interactive Atlas of Heart Disease and Stroke, a tool developed by the Centers for Disease Control and Prevention. http://nccd.cdc.gov./DHDSPAtlas.

Two maps were created, with one depicting the Non-Hispanic White population in Texas, and the other depicting the stroke mortality rates for Texas, by county. The data for percentage of Non-Hispanic whites and age-adjusted stroke mortality rates (per 100,000) were displayed using graduated colors. Five classes of quantiles were used for data classification. A red monochromatic color ramp was used to depict the stroke mortality rates, and a blue monochromatic color ramp was used for Non-Hispanic White population percentages. Counties with insufficient data are colored in grey. Both the maps were displayed on a horizontal layout, on NAD 1983 Texas Statewide Mapping System projection coordinates.

Vineetha Duddu, MPH, Texas Department of State Health Services

Vineetha Duddu, MPH, Texas Department of State Health Services. Accessed from the Centers for Disease Control and Prevention’s Chronic Disease GIS Exchange https://www.cdc.gov/dhdsp/maps/gisx/mapgallery/tx-stroke-mortality.html

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