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American Death Rate Due to Drugs, Alcohol, Mental Disorders Triples Since 1980

by Bidita Debnath on December 14, 2016 at 11:52 PM
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 American Death Rate Due to Drugs, Alcohol, Mental Disorders Triples Since 1980

Since 1980, more than 2,000 US counties witnessed increases of 200% or more in deaths related to substance abuse and mental disorders, including clusters of counties in Kentucky, West Virginia, and Ohio with alarming surges over 1,000%, according to a new scientific study.

The study examines deaths in 21 cause groups, ranging from chronic illnesses like diabetes and other endocrine diseases, to infectious diseases, such as HIV/AIDS and tuberculosis, to accidents, including traffic fatalities. It explores mortality rates and how they have changed in every US county between 1980 and 2014, creating the most comprehensive view to date of how Americans die.

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The study was conducted by the Institute for Health Metrics and Evaluation (IHME) at the University of Washington in Seattle, and was published today in JAMA.

Cardiovascular disease was the leading cause of death overall in the United States in 2014, but cancers were responsible for more years of life lost to early death than any other cause. Still, the rate at which Americans die from cancer and other diseases or injuries differs significantly among communities, highlighting stark health disparities across the nation. For instance, the counties with the highest and the lowest mortality rates from cirrhosis and other liver diseases were both in South Dakota, with 193 deaths per 100,000 people in Oglala Lakota County, to seven deaths per 100,000 people in Lincoln County.
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"While the leading causes of death are similar across counties, we found massive disparities in the rates at which people are dying among causes and communities," explained lead author Laura Dwyer-Lindgren. "For causes of death with effective treatments, inequalities in mortality rates spotlight areas where access to essential health services and quality of care needs to be improved."

Other causes vary by changes in mortality rates since 1980. For example, about half of US counties saw increases in suicide and violence, while the other half of counties experienced decreases. Kusilvak Census Area in Alaska topped the list with a 131% mortality rate increase, while the rate in New York County, New York, dropped by 72% - the most dramatic decrease in the country.

Mortality rates from substance abuse - including alcohol and drug use - and mental health disorders are highly variable as well, showing the greatest increases in Clermont County, Ohio (2,206%), and Boone County, West Virginia (2,030%), and the largest drops in Aleutians East Borough, Aleutians West Census Area, Alaska, and Miami-Dade County, Florida, declining by 51% and 45%, respectively.

"The mortality trends in mental and substance use disorders, as well as with other causes of death covered in the study, point to the need for a well-considered response from local and state governments, as well as care providers, to help reduce the disparities we are seeing across the country," said Dr. Christopher Murray, Director of IHME.

Other county-level trends in the study include:

Chronic respiratory diseases, a group that includes COPD and asthma, saw the most dramatic increases in a band of counties spanning northern Texas to the Carolinas. Concurrently, a small number of counties along the Mexico border, in northwestern New Mexico, and in central Colorado, experienced decreases. The national mortality rate from traffic accidents decreased by 45% between 1980 and 2014. Generally, lower death rates were found in urban areas, and higher rates were seen in rural counties.

While select counties in Montana, Florida, and North and South Dakota have the highest mortality rates from cirrhosis and liver disease, sharp increases were seen in southwestern Oregon and northwestern Texas since 1980.

Deaths from neurological disorders, such as Alzheimer's disease and other forms of dementia, increased in the majority of counties over the 35-year span of the study, with especially large increases in counties stretching from eastern Texas and Oklahoma to Alabama.

"We know that unequal medical access and quality of care create health disparities in the US for many causes of death, while other causes are linked to risk factors or policies," said Dr. Ali Mokdad, Professor of Global Health at IHME and study co-author. "Indeed, this study will inform the debate on how to improve the health of our nation."

While nearly all deaths in the United States are reported in death certificates, the causes of death recorded may be vague or even implausible. For example, a physician may report that someone died of heart disease, when the underlying cause was, in fact, hypertensive heart disease. To correct for this, the study authors reassigned deaths with nonspecific causes to their likely underlying causes, improving the accuracy of the estimates.

Source: Eurekalert
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