Abstract
The relations of EEG findings at the time of initial examinations to the age and sex of subjects were studied.
1. The total subjects consisted of a larger number of males (3014) than females (1986), and the subjects in each desease also consisted of a larger number of males.
2. The incidence of EEG abnormalities in patients with epilepsy, those with head injury, those with headache as chief complaint and those with whiplash syndrome was lowest in the 40's age group. Among those who were younger than 40, younger the age, higher the incidence. Among those older than 49, older the age, higher the incidence.
3. The incidence of paroxysmal patterns in patients with epilepsy, those with head injury and those with headache as chief complaint was highest in the group of not older than nine. Among those who were older than nine, older the age, lower the incidence.
4. The incidence of EEG abnormalities in female patients with epilepsy, those with head injury of Araki I type, those with nervousness and neurosis and those with whiplash syndrome was significantly higher than that in the respective male counterparts, and the incidence of the abnormalities in female patients with headache as chief complaint also was higher than that in male patients with the same complaint. This difference between the two sexes was especially distinct in the 20's and younger age groups.
5. The incidence of paroxysmal patterns in female patients with epilepsy, those with head injury and those with headache as chief complaint was significantly higher than that in the respective male patients, and this difference between the two sexes was particulary distinct in the 20's and younger age groups.
