In young and middle aged adults the leading cause of accidents is automobile accidents. Automobile accidents are a big cause of death period over all age groups but older adults tend to end up falling ill so illnesses have to factor into causes of death for idivduals who are aroud 50 years or older.
On a whole automobile accidents claim many lives per year with the most of these lives being young or middle aged adults. In addition there are the lives that are effected by automobile accidents but not actually extinguished. Some people are permanately injured either physically or mentally as a result of such accidents.