Efficacy, Safety, and Tolerability Study of AVP-786 as an Adjunctive Therapy in Patients With Major Depressive Disorder With an Inadequate Response to Antidepressant Treatment

The HAM-D is a clinician-rated scale that evaluates the level of depression. The HAM-D consists of 17 items (with scale in parentheses) such as Depressed Mood (0-4), Guilt (0-4), Suicide (0-4), Insomnia, initial (0-2), Insomnia, middle (0-2), Insomnia, late (0-2), Work and Interests (0-4), Psychomotor Retardation (0-4), Psychomotor Agitation (0-4), Anxiety, psychic (0-4), Anxiety, somatic (0-4), Gastrointestinal Symptoms (0-2), Somatic Symptoms, general (0-2), Sexual Interest (0-2), Hypochondriasis (0-4), Insight (0-2), and Weight Loss (0-2). Summed subscales are combined to compute a total score. Total score ranges from 0 to 52, with a higher score indicating worse condition.

The MGH ATRQ is given in this study to assess treatment resistance in depression. Participants are to provide information on the questionnaire about the dose level and duration for each medication that has been taken during their current episode/stage of depression. Participants are also to provide the medication that helped them the most and answer a question about the degree of improvement.

The 16-item Quick Inventory of Depressive Symptomatology-Self-Report (QIDS-SR16) is a patient-reported questionnaire used to assess the severity of depressive symptoms over the previous 7 days. The questionnaire assesses sleep, mood, appetite/weight, concentration, self-perception, suicidal thoughts, interest, energy, and psychomotor changes. Each item is scored from 0 to 3, with higher scores indicating greater symptom severity. The total score is calculated using a standard algorithm that sums the highest-rated item within selected symptom domains and individual domain scores, resulting in a total score ranging from 0 to 27, with higher scores indicating more severe depressive symptoms.

The participant is to assess how disruptive their depression symptoms have been on a 0 to 10 scale, as shown below: 0 Not at all, 1 to 3 Mildly, 4 to 6 Moderately, 7 to 9 Markedly, 10 Extremely. The 3 items will be summed to obtain a measure of global functional impairment that ranges from 0 (unimpaired) to 30 (highly impaired). Higher scores indicate worse conditions.

The CGI-S is clinician's assessment of the participant's illness at the time of the assessment. The CGI-S is scored according to the following 7-point scale, with a higher score indicating a higher severity of illness (0 = not assessed): 1 = normal, not at all ill, 2 = borderline mentally ill, 3 = mildly ill, 4 = moderately ill, 5 = markedly ill, 6 = severely ill, 7 = extremely ill.

The CGI-C is clinician's assessment of the participant's change in illness at the time of the assessment, using the following 7-point scale (0 = not assessed): 1 = Very much improved, 2 = Much improved, 3 = Minimally improved, 4 = No change, 5 = Minimally worse, 6 = Much worse, 7 = Very much worse. A lower score indicates an improvement in illness.

The EQ-5D-5L, a scale used to measure quality of life, is divided into 2 parts, the descriptive system and the visual analog scale (VAS), reported as separate scores. The descriptive system is divided into five categories: mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. For each category, the participant selects the one statement that best describes their health on the day of assessment. Each category is scored on a 5-point scale(1=no problems to 5=extreme problems or inability to perform the activity) [e.g., for mobility: 1 = no problems walking and 5 = unable to walk]. Missing values for a given category are imputed with a value of 9 and are excluded from the summary for that category. Higher scores for each category= worse health condition. The VAS is a 0 (worst health you can imagine) to 100 (best health you can imagine) vertical scale, where the participant places an X on the scale where they feel their health is today and then writes the number.

The PGI-C asks the participant to rate their overall impression of change in their depression symptoms from the time of study entry to the present. The PGI-C is scored on a 7-point scale, where 1 = very much improved, 2 = much improved, 3 = minimally improved, 4 = no change, 5 = minimally worse, 6 = much worse, and 7 = very much worse. Higher scores indicate worsening of depression symptoms.

The GAD-7 is a self-reported questionnaire used to assess symptoms of generalized anxiety disorder. It consists of 7 questions evaluating feelings of nervousness or anxiety, inability to stop or control worrying, excessive worrying, trouble relaxing, restlessness, irritability, and fear that something awful might happen. Each item is scored on a 4-point scale, where 0 = not at all, 1 = several days, 2 = more than half the days, and 3 = nearly every day. The scores for all seven items are summed to produce a total score ranging from 0 to 21, with higher scores indicating greater severity of anxiety symptoms.