Traumatic brain injury in the United States: national estimates of prevalence and incidence, 2002–2006

Abstract

IntroductionTraumatic Brain Injury (TBI) is an important public health problem in the United States (US) resulting in disabling conditions and long-term societal costs. Thus, there a compelling need for prevention, treatment and rehabilitation initiatives informed by national, population-based data. ObjectiveTo estimate the prevalence and incidence of TBI in the US utilizing several nationally representative data sets. MethodsTo produce national estimates, we averaged and analysed data from 2002-2006 for TBI-related visits to hospital-based emergency departments (EDs), hospitalisations, and deaths from the National Hospital Ambulatory Medical Care Survey, the National Hospital Discharge Survey, and the National Vital Statistics System, respectively. ResultsFor 2002-2006, the estimated average annual incidence of TBI was 1.7 million, including 52 000 deaths, 275 000 hospitalisations, and 1 365 000 ED visits. For all age groups, the leading external causes were as follows: falls (35.2%); motor vehicle traffic (17.3%); struck by/against events (16.5%); assaults (10%). Rates were higher for males than females in all age groups. Falls produced the greatest number of TBI-related ED visits, (523 043) and hospitalizations (62 334). Motor vehicle traffic was the leading cause of TBI death, with rates highest among those 20-24 years. Children 0-4 years, adolescents 15-19 years, and adults >65 years were most likely to sustain a TBI and adults >75 years had the highest rate for hospitalisation and death. Annually, almost half a million TBI-related ED visits, 473 947, were made by children aged 0-4 years. TBI was a contributing factor to one third of all injury related deaths in the US.