Motor vehicle accidents related to psychiatric impairment

To aid in preventing motor vehicle accidents, physicians should be aware of psychiatric factors related to impaired driving ability. Individuals with alcoholism and personality disorders account for much of the increased risk of accidents among the mentally ill. Alcoholics are involved in one third of accidents involving fatalities. Contrary to speculation, less than 5% of such accidents represent suicides. Individuals with antisocial traits and personality also appear to have an important role in motor vehicle accidents. These accidents are often preceded by stressful life events, especially disruption of important relationships. Alcohol and other substances also contribute to accident risk.