Adaptive Design Study of NEST sTMS in Subjects With Major Depressive Disorder

A Prospective, Multicenter, Double-Blind, Sham-Controlled Adaptive Design Study to Confirm the Safety and Efficacy of NEST sTMS in Subjects With Major Depressive Disorder Who Have Not Responded to at Least One Antidepressant Medication in the Current Episode

This is a double-blind, sham controlled, multi-center study to confirm the safety and efficacy of synchronized transcranial magnetic stimulation (sTMS) for the treatment of patients currently experiencing an episode of depression who have failed to respond to at least one (1) antidepressant medication. Patients will be randomly assigned to either active or sham therapy and will undergo daily treatments for a period of time. Following completion of blinded treatments, patients may be eligible for a course of open label treatments.

Prospective, randomized, double-blind, sham-controlled, parallel group adaptive design study to confirm the safety and efficacy of sTMS in subject with Major Depressive Disorder (MDD) who have not responded to at least one antidepressant medication in the current episode. MDD was diagnosed according to DSM-IV criteria rendered by structured interview using the Mini International Neuropsychiatric Interview (MINI). Subjects must have discontinued any antidepressant medication a minimum of 1 week prior to initiation of treatment with the active sTMS or sham device. Following wash-out of the antidepressant medication, an additional evaluation was performed to determine whether the protocol eligibility criteria were met before randomization and treatment. Randomized subjects were treated 5 days per week for 6 weeks. Subjects who completed 6 weeks of double-blind treatment may have been eligible to receive up to 6 weeks of open-label treatment as clinically indicated during the follow-up phase of the study. Follow-up evaluation visits were conducted during those six weeks, with frequency of the visits determined by the treatment choice during that time frame (open label subjects had weekly evaluation visits for 6 weeks).

Depressive Disorder, Depression, Depressive Disorder, Major, Depressive Episode, Major Depressive Disorder

Synchronized Transcranial Magnetic Stimulation (sTMS) treatments to be administered using an active device 5 times per week for six treatment weeks.

sTMS delivers brain stimulation via a continuous magnetic field created by the device and set to the individual patient's intrinsic alpha frequency (IAF).

Sham stimulation is designed to look, sound and feel like the investigational device, but does not deliver magnetic stimulation to the brain.

Incidence of Clinical Response (Reduction of At Least 50% in Baseline HAMD-17 Score) in Per-Protocol Population

Number of participants at the end of each treatment week who saw a reduction of at least 50% in baseline Hamilton Depression Rating Scale (HAMD-17) scores from baseline to week 6, compared between the active treatment and sham-controlled groups. The Hamilton Depression Rating Scale (HAMD-17) system asks 17 questions to rank subject on a scale ranges between 0-52, with higher numbers indicating more severe symptoms. 0-7 is generally accepted to be within the normal range (or in remission), while a score of 20 or higher indicates moderate to severe depression.

Change from the baseline in HAMD-17 total score from baseline to week 6, compared between the active treatment and sham-controlled groups. The Hamilton Depression Rating Scale (HAMD-17) system asks 17 questions to rank subject on a scale ranges between 0-52, with higher numbers indicating more severe symptoms. 0-7 is generally accepted to be within the normal range (or in remission), while a score of 20 or higher indicates moderate to severe depression.

Change from the baseline in Montgomery-Asberg Depression Rating Scale (MADRS) total score from baseline to week 6, compared between the active treatment and sham-controlled groups. The MADRS scale ranges between 0-54, with higher numbers indicating more severe symptoms. 0-6 is generally accepted to be within the normal range (or in remission), 7-19 represents mild depression, while a score of 20 or higher indicates moderate to severe depression.

Responder Analysis: Mean Change (SD) in HAMD-17 Scores From Baseline to End of Treatment in Per-Protocol Patients With Individual Alpha Frequency Greater Than 9.8 Hz

Measure of change in mean (SD) of HAMD-17 scores from baseline to end of treatment in per-protocol patients with an Individual alpha frequency (IAF) of greater than 9.8Hz. The Hamilton Depression Rating Scale (HAMD-17) system asks 17 questions to rank subject on a scale ranges between 0-52, with higher numbers indicating more severe symptoms. 0-7 is generally accepted to be within the normal range (or in remission), while a score of 20 or higher indicates moderate to severe depression.

Change in HAMD-17 total score during 6 weeks of open-label treatment, compared between the active treatment and sham-controlled groups. The Hamilton Depression Rating Scale (HAMD-17) system asks 17 questions to rank subject on a scale ranges between 0-52, with higher numbers indicating more severe symptoms. 0-7 is generally accepted to be within the normal range (or in remission), while a score of 20 or higher indicates moderate to severe depression.

Incidence of Clinical Response (Reduction of At Least 50% in Baseline HAMD-17 Score) in Open-Label Per-Protocol Population

Number of participants seeing reduction of at least 50% in baseline Hamilton Depression Rating Scale (HAMD-17) scores during 6 weeks of open-label treatment, compared between the active treatment and sham-controlled groups. The Hamilton Depression Rating Scale (HAMD-17) system asks 17 questions to rank subject on a scale ranges between 0-52, with higher numbers indicating more severe symptoms. 0-7 is generally accepted to be within the normal range (or in remission), while a score of 20 or higher indicates moderate to severe depression.

Inclusion Criteria: Current episode of Major Depressive Disorder Inadequate response to at least one antidepressant medication in the current episode (Treatment Resistant Depression) Investigator able to identify IAF using EEG Willingness and ability to adhere to treatment schedule (5 treatments per week for six weeks) Exclusion Criteria: Unable to unwilling to give informed consent Diagnosed with excluded conditions or treatment histories Currently hospitalized due to severity of depression symptoms Use of prohibited medications (as defined by protocol) within specified time frame of randomization Use of certain cardiac devices Use of certain intracranial devices Currently pregnant or unwilling to practice acceptable means of birth control, and women who are breastfeeding