The Antidepressant Effect of Intermittent Theta Burst Stimulation (iTBS)
- Conditions
- Executive DysfunctionDepression
- Interventions
- Device: Transcranial magnet stimulationDevice: Sham Transcranial magnet stimulation
- Registration Number
- NCT05516095
- Lead Sponsor
- University Hospital of North Norway
- Brief Summary
The present study is a randomized placebo-controlled trial examining the effect of intermittent theta burst stimulation (iTBS) on unipolar depression. iTBS is a form of transcranial magnet stimulation.
The anti-depressive effect of two weeks of once- a - day neuronavigated iTBS over the dorsolateral left prefrontal cortex (DLPFC) will be investigated in comparison to sham (placebo) iTBS. Previous studies have shown that iTBS is an effective treatment for reducing symptoms of depression, but it is still unclear why some patients have a strong response to iTBS, whereas others show less or no reduction to test possible factors that can explain the inter-individual response to iTBS.
Measures of cognitive functions, structural and functional brain data measured by Magnetic Resonance imaging (MRi), quality of life, sleep quality, general health status, and genetic measures will be obtained to answer the goals of this study.
The main hypotheses are: 1) Patients receiving iTBS will display significantly larger reductions in depressive symptoms measured by the Montgomery-Asberg Depression Rating Scale and Becks Depression Inventory II compared to patients receiving sham stimulation. 2) Reduction in depressive symptoms will be significantly associated with a concomitant improvement in executive functions measured by neuropsychological tests. 3) Stronger connectivity at baseline between the DLFPC and the anterior cingulate cortices will be associated with better response to iTBS. 4) Variability in genetic measures will be significantly associated with treatment response to iTBS. 5) Variability in white matter structural measures of the brain will be significantly associated with the anti-depressive response to iTBS.
Participants will be recruited prospectively, and the study performed at a single university hospital. After written informed consent is obtained from eligible, volunteering patients, baseline measurements will be administrated, and the patient will be allocated to either sham or active iTBS once a day for 10 consecutive workdays. Four weeks after the last treatment day, the patients will be followed up by phone interviews.
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- RECRUITING
- Sex
- All
- Target Recruitment
- 84
- A MADRS score of =/ > 20 (moderate depression).
- The current depressive episode must have lasted more than 2 weeks but less than 2 years
- Drug therapy must have been stable for the last three weeks prior to the first treatment day with iTBS and is to be kept stable throughout the study until 4 weeks after the last day of iTBS treatment.
- Patients must volunteer to provide informed consent, be able to follow the treatment schedule and have a satisfactory safety screening for iTBS and MRI.
- The current depressive episode is in the mild range or contrary that the current episode fulfills the criteria for a major depressive episode requiring inpatient treatment and/or electroconvulsive therapy.
- The current depressive episode is clearly triggered by grief or a recent major stressful life event.
- Bipolar disorder.
- Borderline personality disorder.
- Psychotic symptoms the last 6 months.
- Alcohol or substance abuse/addiction in the last 6 months.
- Current eating disorders.
- Obsessive- compulsive disorders.
- Post-traumatic stress disorder.
- Any medical history of seizure.
- Any neurological or neurosurgical pathologies.
- Any current cardiac or systemic disease.
- Metallic prosthetic material or foreign objects in the body (pacemakers, internal cardioverter defibrillator units, insulin pump, prosthetic eye equipment, etc.).
- Previously diagnosed developmental disorder.
- Pregnancy or lactating.
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Active iTBS Transcranial magnet stimulation iTBS will be delivered with 120% of resting motor threshold, triplet 50 Hz bursts repeated at 5 Hz; 2 seconds on and 8 s off, 600 pulses per session with a total duration of 3 min 9 s. Treatment will be provided for 10 days for two consecutive weeks (except Saturdays and Sundays). Each patient will start treatment at the same time between 9 am and 3 pm during the 10-day treatment period. Sham iTBS Sham Transcranial magnet stimulation The sham system has an identical look, weight and sound compared to the true coil, and delivers electrical stimulation that can be felt at the skin but without penetrating the skull and thus not inducing any treatment effect. The sham stimulation will be given with the same procedure as the active stimulation; 2 seconds on and 8 s off, 600 pulses per session with a total duration of 3 min 9 s.
- Primary Outcome Measures
Name Time Method Montgomery-Asberg Depression Rating Scale. Up to 4 months. Clinician rated depression inventory.
Beck's Depression Inventory - II. Up to 4 months. Patient reported depression inventory.
- Secondary Outcome Measures
Name Time Method Wisconsin Card Sorting Test. Up to 2 weeks. Performance based measure of executive functions.
Delis-Kaplan Executive Function System. Up to 2 weeks. Performance based measure of executive functions.
Brief-A Up to 4 months. Questionnaire for self-reported executive functioning.
Whodas 2.0 Up to 4 months. Self-reported disability assessment schedule.
Pittsburgh Sleep Quality Index. Up to 4 months. Self-reported measure of sleep quality.
Beck's Anxiety Inventory. Up to 4 months. Patient reported anxiety inventory.
Trial Locations
- Locations (1)
University Hospital North Norway
🇳🇴Tromsø, Norway