The research is published in the December 1, 2009, print issue of Neurology®, the medical journal of the American Academy of Neurology. People who live in the stroke belt in adulthood also had elevated risk of dying from stroke, even if they were not born there.
For the study, researchers examined information from the 1980, 1990 and 2000 US national death records for people age 30 to 80 who were born and lived in 49 US states. Stroke death rates were calculated by linking this information to US census information. The stroke belt was defined as seven states: North Carolina, South Carolina, Georgia, Tennessee, Arkansas, Mississippi and Alabama.
The study looked at four groups of people: those who were born and lived in the stroke belt as adults, people born in the stroke belt but who did not live there as adults, those born outside the stroke belt but who lived there as adults and those who were not born or lived in the stroke belt.
The study found that those who were born in the stroke belt and then moved away had a higher risk of death caused by stroke than those who were born outside the region and still lived outside the region as adults. The same was true with those who were born elsewhere but later moved to the stroke belt. At the highest risk were those who were both born in the stroke belt and lived there as adults.
For example, both Caucasians and African-Americans who were born and lived in the stroke belt as adults had a 34 percent higher risk of dying from stroke in 2000 compared to people of the same gender, age, and race who were born and lived outside of the stroke belt in the same year.
The rate of death related to stroke was 74 per 100,000 for people who were born in the stroke belt and lived there in the year 2000, but only 47 per 100,000 for people who were neither born in the stroke belt nor lived there in the year 2000, although this inequality partially reflects differences in age and race.
"Our results cannot pinpoint a specific explanation, but they are consistent with other research suggesting that the roots of stroke risk begin in childhood or even infancy. Efforts to reduce the incidence of fatal stroke may need to consider how underlying physiologic changes accumulate from early life. It is possible that where one lives affects stroke risk through socioeconomic conditions, social stressors, environmental factors, or access to preventive medical care," said study author M. Maria Glymour, ScD, with Harvard School of Public Health in Boston.
"Many important behaviors such as diet, physical activity, and smoking are shaped by childhood social conditions. Future long-term national studies with detailed information on when people moved are needed to help show whether those who move may have different patterns of risk factors and also identify more precisely at what point in life stroke risk begins to build. This will help us understand how to reduce stroke for people living in every region of the country," Glymour said.
The study was supported by the Harvard Program on Global Demography of Aging and the National Institute on Aging.
The American Academy of Neurology, an association of more than 21,000 neurologists and neuroscience professionals, is dedicated to promoting the highest quality patient-centered neurologic care. A neurologist is a doctor with specialized training in diagnosing, treating and managing disorders of the brain and nervous system such as Parkinson's disease, ALS (Lou Gehrig's disease), dementia, West Nile virus, and ataxia.
For more information about the American Academy of Neurology, visit http://www.aan.com or http://www.thebrainmatters.org.
Rachel Seroka | EurekAlert!
Drone vs. truck deliveries: Which create less carbon pollution?
31.05.2017 | University of Washington
New study: How does Europe become a leading player for software and IT services?
03.04.2017 | Fraunhofer-Institut für System- und Innovationsforschung (ISI)
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology