The driving records of 108 diabetics, 77 epileptics, 78 persons diagnosed as suffering from other specified neurological conditions, and 55 persons diagnosed as having a cardiac or circulatory condition, who were granted drivers licenses after being evaluated by the Oklahoma Medical Advisory Committee in 1969, were studied. The accident rates of individuals in the selected disease categories were compared to the accident rates of Oklahoma's 1.65 million licensed drivers according to age, sex, and year of driving exposure. The violation rates of the disease groups were compared to the overall violation rate of all licensed Oklahoma drivers.

It was determined that epileptics, diabetics, and persons suffering from other neurological conditions have higher accident and violation rates than licensed Oklahoma drivers not known to be affected. Also, Oklahoma drivers diagnosed as suffering from cardiac or circulatory conditions, as a group, have lower violation rates, and slightly higher accident rates than drivers not known to be affected.