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Deaths from Unintentional Injuries Increase for Many Groups

While the total mortality rate from unintentional injury increased in the U.S. by 11 percent between 1999 and 2005, far larger increases were seen in some subgroups analyzed by age, race, ethnicity and type of injury by researchers at the Johns Hopkins Bloomberg School of Public Health’s Center for Injury Research and Policy.

Their analysis found that white women between 45 and 64 years old experienced a 230 percent increase in the rate of poisoning mortality over the study period. White men in this age group experienced an increase of 137 percent. The study is available online at the website of the American Journal of Preventive Medicine in advance of publication in the September print edition of the journal.

The study also found mortality rates from falls varied widely across age and gender. The death rate from falls increased 38 percent for white men and 48 percent for white women 65 and older. The mortality rate did not increase significantly for older blacks of either sex. Overall, 89 percent of the total increase in unintentional injury deaths in the U.S. between 1999 and 2005 was due to poisoning among those 15 to 64 years old and falls among those 45 and older, which increased by about 11,200 and 6,600, respectively.

“The large increases in the number of deaths attributable to poisoning and falls underscore the need for more research on the specific circumstances involved,” said study co-author Susan P. Baker, MPH, a professor with the Bloomberg School’s Center for Injury Research and Policy.

“While we don’t know the cause behind the recent increase in falls mortality, it appears that the increase in poisonings is largely due to prescription drugs.” Baker says national prevention efforts are needed to control the abuse of prescription drugs and limit access. Prescriptions for opioid analgesics to address pain have increased dramatically in the past decade, and data from the Centers for Disease Control and Prevention (CDC) show that prescription drugs have replaced illegal drugs such as cocaine as the most prominent substances in fatal drug overdoses.

Senior author Guoqing Hu, PhD, and Baker analyzed data from the CDC Web-based Injury Statistics Query and Reporting System (WISQARS), which provides data on deaths according to cause and intent of injury. WISQARS mortality data are based on annual data files of the National Center for Health Statistics (NCHS) of CDC.

In addition to falls and poisonings, four other leading causes of intentional injury deaths were identified for subsequent analyses: suffocation, drowning, fire/burns and motor vehicle crashes. Suffocation rates generally decreased or had no significant change, but they greatly increased in white children less than one year old. Drowning rates increased among white men 65 and older and among white middle-aged women, but decreased in black males 5 to 24 years old, black females 5 to14 years old, and whites females 15 to 24 years. Mortality from fires and burns decreased the most. The rate of dying due to a motorcycle crash more than doubled in Hispanic males 15 to 24 years and in white males ages 45 to 64 years.

“By teasing out the impact of gender, age and race on trends in mortality rates, we are able to better identify changes worthy of attention from clinicians and policymakers,” said Hu. “As injury continues to be a leading cause of death for all age groups, and in fact the leading cause of death for adults 44 and younger, it’s critical we redouble our efforts to prevent unnecessary suffering and save lives.”

The research was funded by the Johns Hopkins Center for Injury Research and Policy.

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Additional media contact: Alicia Samuels, MPH, 410-614-5555 or>

Tim Parsons | Newswise Science News
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