18 depressive female patients and comparison group of 18 healthy women, mean age 39 years, participated. The depression was determined by use of the Hamilton Depression Rating Scale. Patients with a score more than 14 were eligible (average score: 21). All the subjects passed two sessions with exposure and sham exposure. During the experiments subjects were lying in a dark room, eyes closed and ears blocked.
|Exposure duration||continuous for 30 min|
|Duty cycle||50 %|
|Repetition frequency||1,000 Hz|
|Distance between exposed object and exposure source||10 cm|
|Chamber||The subjects were lying in a relaxed position with their eyes closed and ears blocked in a dark room with the experimenter present.|
|Setup||The antenna was located at 10 cm from the skin on the left side of the head.|
|Sham exposure||A sham exposure was conducted.|
|Additional info||All subjects passed two test sessions (one only per day) with RF or sham exposure randomly assigned.|
The subjective rating tests revealed improvement in subjective mood after exposure in 11 depressive subjects (sham exposure: 7) and no changes in 7 patients (sham exposure: 10).
The EEG analysis showed statistically significant changes in H-parameter for five patients with depressive disorder and for one healthy subject.