Effect of Intermittent and Continuous Theta Burst Stimulation on Sleep, Daytime Sleepiness, and Fatigue in Depression

Inventory consisting of 21 items measuring cognitive, affective, somatic, and vegetative symptoms of depression. Each item is scored from 0 to 3, with a higher score denoting more severe depression. Items are related to the criteria from the Diagnostic and Statistical Manual of Mental Disorders-IV. The minimum value of the total score is 0 and the maximum is 63 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

Pittsburgh Sleep Quality Index is a questionnaire to identify sleep disturbances. It consists of a combination of Likert-type and open-ended questions, which are later converted to scaled scores. Scores for each question range from 0 to 3, with higher scores indicating greater sleep disturbances. The minimum value of the total score is 0 and the maximum is 21 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

An 18-item scale assessing negative symptoms, such as emotional withdrawal (e.g. withdrawal from relations), motor slowness and blunted affect. Each item is rated from 1 to 7 with 7-point Likert scaling, where 7 means the most severe disturbance. The minimum value of the total score is 18 and the maximum is 126 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

An eight-item scale. Each item refers to a situation such as driving a car or sitting quietly. The subject is asked to assess the chance of dosing in each situation, ranging from 0 (no chance) to 3 (dosing very likely). The minimum value of the total score is 0 and the maximum is 24 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A 10-item scale to assess the severity of fatigue. Each item is an expression describing the fatigue, such as: "I am bored by fatigue" or "Mentally I feel exhausted". Each item is answered using a Likert-type scale ranging from 1 (never) to 5 (always). The minimum value of the total score is 10 and the maximum is 50 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A 34-item, self-reported scale to assess the impact of depression on the quality of life. The scale is scored binomially with higher scores indicating a lower quality of life. The minimum value of the total score is 0 and the maximum is 34 with higher scores meaning worse outcome. Change from the baseline to the measurement done after finishing intervention, to the measurement done two weeks after finishing intervention to the measurement done four weeks after finishing intervention.

A 23-channel electroencephalography (EEG), 2-channel electrooculogram (EOG) and a chin electromyogram (EMG) recorded through 45 minutes in lying position with eyes closed. The recordings will then be divided into 30 second epochs. Each epoch will be assigned to particular sleep stage or wake, according to standards of sleep staging issued by the American Academy of Sleep Medicine [Silber et al. 2007]. The difference in the latency of non-rapid eye movement 1 sleep stage (the time from light off to the first epoch of the non-rapid eye movement 1 sleep stage) before and after intervention will be assessed.

A 23-channel electroencephalography (EEG), 2-channel electrooculogram (EOG) and a chin electromyogram (EMG) recorded through 45 minutes in lying position with eyes closed. The recordings will then be divided into 30 second epochs. Each epoch will be assigned to particular sleep stage or wake, according to standards of sleep staging issued by the American Academy of Sleep Medicine [Silber et al. 2007]. The difference in the latency of non-rapid eye movement 2 sleep stage (the time from light off to the first epoch of the non-rapid eye movement 2 sleep stage) before and after intervention will be assessed.