|Johns Hopkins: Hearing Loss Triples Risk for Falling in Middle Age Adults and ElderlyFrom The Hearing Review, 2/28/12
A new study led by a Johns Hopkins researcher suggests that having hearing loss triples the risk of falling down for people in their 40s and later. The findings are regardless of whether the hearing loss is moderate or severe.
The finding could help researchers develop new ways to prevent falls, especially in the elderly, and their resulting injuries that generate billions in health care costs in the United States each year, by some estimates.
To determine whether hearing loss and falling are connected, Frank Lin, MD, PhD, at Johns Hopkins, and his colleague Luigi Ferrucci, MD, PhD, of the National Institute on Aging, used data from the 2001 to 2004 cycles of the National Health and Nutrition Examination Survey.
During those years, 2,017 participants ages 40 to 69 had their hearing tested and answered questions about whether they had fallen over the past year. Researchers also collected demographic information, including age, sex and race, and tested participants’ vestibular function.
Lin, an assistant professor at the Johns Hopkins University School of Medicine and the university’s Bloomberg School of Public Health, and Ferrucci found that people with mild (25 dB) hearing loss were nearly three times more likely to have a history of falling.
Every additional 10 dB of hearing loss increased the chances of falling by 1.4 fold. This finding still held true, even when researchers accounted for other factors linked with falling, including age, sex, race, cardiovascular disease and vestibular function. Even excluding participants with moderate to severe hearing loss from the analysis didn’t change the results.
Lin, an otologist and epidemiologist, says among the possible explanations for the link is that people who can’t hear well might not have good awareness of their overall environment, making tripping and falling more likely.
Another reason hearing loss might increase the risk of falls, Lin adds, is cognitive load, in which the brain is overwhelmed with demands on its limited resources.
“Gait and balance are things most people take for granted, but they are actually very cognitively demanding,” Lin says. “If hearing loss imposes a cognitive load, there may be fewer cognitive resources to help with maintaining balance and gait.”
Their findings are published in the Archives of Internal Medicine.
SOURCE: Johns Hopkins
Thanks to Bob MacPherson