Traumatic brain injuries (TBI) have been receiving a lot of attention lately because of the large number of such injuries suffered by soldiers in Iraq and Afghanistan, and the risk of concussions in sports like football and hockey. But many TBI incidents are caused by car accidents or car-pedestrian accidents. In the elderly, many brain injuries are caused by falls. Often these falls occur when patients are left unsupervised in hospitals or nursing homes.
According to the federal Centers for Disease Control and Prevention, about 1.7 million people a year experience a traumatic brain injury in the United States. Of those, 275,000 are hospitalized, and more than 50,000 die. More than 5 million Americans are estimated to suffer from a long-term disability following such injuries. The direct medical expenses and indirect costs, including lost productivity, have been estimated at $76 billion a year, according to the C.D.C.
Now scientists are examining the use of progesterone, the reproductive hormone, to help TBI patients. The new study, described in the New York Times, was financed by the National Institutes of Health and overseen by Emory University in Atlanta. The purpose of the study is to test the hypothesis that the hormone can reduce mortality and disability if administered right after a traumatic brain injury.