Telematic electrodiagnosis from six laboratories in three European countries and one Asian country

The results of an electrodiagnostic test, the electro-oculogram, recorded under standardized conditions, were compared. Recordings were obtained from 70 normal subjects in three European countries and 28 subjects in an Asian country. All subjects were 18-34 years old. Equal numbers of male and female patients were tested in each of six laboratories. There were no significant differences between the results of the European laboratories. There were, however, significant differences between the results of the European and the Asian laboratories, and between the results from the male and female subjects in all laboratories. This suggests the need for considering the possibility of male/female as well as local variations in normal control values when telemedicine is applied on a global scale.