A Study for Participants With Major Depression

Clinical Global Impression of Improvement Score at Week 8

The Clinical Global Impression of Improvement (CGI-I) scale measures the clinician's perception of participant improvement at the time of assessment compared with the start of treatment. Scores range from 1 (very much improved) to 7 (very much worse). Least Squares (LS) means were calculated using mixed model repeated measures (MMRM) adjusting for treatment, investigator, visit, and treatment-by-visit.

Time frame: Week 8

Change From Baseline in Hamilton Anxiety Rating Scale (HAMA) Total Score up to Week 8 Endpoint

The HAMA is a 14-item assessment used to assess the severity of anxiety. The investigator talked to the participant about the symptoms he or she experienced during the previous week. Each item was scored using a 5-point scale (0=not present to 4=very severe). The total score of HAMA ranged from 0 (normal) to 56 (severe). Least Squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to Week 8

Change From Baseline on the 36-item Short-Form (SF-36) Health Status Survey Mental and Physical Components up to Week 8 Endpoint

The SF-36 Health Status Survey is a generic, health-related scale assessing a participant's quality of life on 8 domains: general health (GH), physical functioning (PF), role-physical, role-emotional, social functioning, bodily pain, vitality, and mental health. Each domain is scored by summing the individual items (GH \[range: 5-25\]; PF \[range: 10-30\]; role-physical \[range: 4-8\]; role-emotional \[range: 3-6\]; social functioning \[range: 2-10\]; bodily pain \[range: 2-11\]; vitality \[range: 4-24\]; mental health \[range: 5-30\]) and transforming the scores into a 0 to 100 scale, with higher scores indicating better health status or functioning. Two summary scores (mental component and physical component scores) were constructed based on the 8 SF-36 domains. Mental component summary and physical component summary scores range from 0 to 100 (higher scores indicate better health status).

Time frame: Baseline, up to Week 8

Change From Baseline in Quick Inventory of Depressive Symptomatology Total Score up to Week 8 Endpoint

The Quick Inventory of Depressive Symptomatology is a 16-item participant-rated measure of depressive symptomatology. There were 4 possible answers per question that are specific to the question; each question (Q) was scored 0 (no problems) to 3 (increased symptoms). The total score was the sum of the highest number from Q1-4, number from Q5, highest number from Q6-9, total for Q10-14, and the highest number from Q15-16. The total score ranges from 0 to 27 with higher scores indicative of greater severity of depression. Least Squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to Week 8

Change From Baseline in Beck Scale for Suicide Ideation up to Week 8 Endpoint

Beck Scale for Suicide Ideation (BSI) is a 21-item participant-completed questionnaire designed to assess severity of suicidal ideation in adults and adolescents. The BSI total score is calculated as the sum of the responses (rated from 0 to 2 in terms of severity) to the first 19 items of the BSI scale. The BSI total score ranges from 0 to 38, with a higher score indicating a higher degree of suicide ideation.

Time frame: Baseline, up to Week 8

Change From Baseline in Modified Overt Aggression (OAS-M) Scale up to Week 8 Endpoint

OAS-M is a clinician-administered semistructured interview designed to assess various manifestations of aggressive behavior. Final scores are rated on 3 scales: Aggression (Agg), Irritability (Irrt), Suicidality (Suic). Agg scale has 4 subscales: Verbal Assault (Aslt), Aslt Against Objects, Aslt Against Others, Aslt Against Self; each item is scored 0-5, multiplied by the frequency of the behavior, then summed together. Agg total score is the weighted sum of the subscale scores (weights: 1=Verbal Aslt, 2=Aslt Against Objects, 3=Aslt Against Others, 4=Aslt Against Self). The Irrt scale has 2 subscales: Global Irrt, Subjective Irrt. Suic scale has 3 subscales: Suicidal Tendencies, Intent of Attempt, Lethality of Attempt. The 2 Irrt and 3 Suic subscales are rated on 6 or 7 point scales from 0=none/not at all to 6/7=very extreme. The total score ranges from 0-10 for the Irrt scale and 0-16 on the Suic scale. Least Squares means were adjusted for treatment, investigator, and baseline s

Time frame: Baseline, up to Week 8

Change From Baseline in Arizona Sexual Experiences Scale up to Week 8 Endpoint

The Arizona Sexual Experiences Scale (ASEX) is used to assess sexual functioning in both males and females. The ASEX total score for the male and female version is calculated as the sum of the responses (rated from 1 \[extremely\] to 6 \[no/never\]) to the 5 items of the ASEX scale. Total scores ranged from 5 to 30 with higher scores indicating greater sexual dysfunction.

Time frame: Baseline, up to Week 8

Change From Baseline in Insomnia Severity Index up to Week 8 Endpoint

The Insomnia Severity Index (ISI) is a brief self-report instrument measuring the participant's perception of his or her insomnia. The ISI score is calculated as the sum of the responses to the 7 items of the ISI scale. Each item is rated on a 0 to 4 scale and the total score ranges from 0 to 28 with a higher score suggesting more severe insomnia.

Time frame: Baseline, up to Week 8

Change From Baseline to Week 8 in Fatigue Severity Scale

Fatigue Severity Scale (FSS) is a 9-item measure of fatigue severity. Each item is scored by the participant on a scale of 1 ("Disagree") to 7 ("Agree"), with a higher score indicating a stronger agreement with the item statement regarding the participant's fatigue symptoms. The FSS total score ranges from 1 to 7, and is obtained by averaging the responses to the 9 items. Least Squares (LS) means were calculated using mixed model repeated measures (MMRM) adjusting for treatment, investigator, visit, baseline score, treatment-by-visit, and baseline score-by-visit.

Time frame: Baseline, Week 8

Pharmacokinetics: Predicted Maximal Concentration of LY2216684 at Steady State (Cmax,ss) at Week 8 Endpoint

Predicted maximal LY2216684 plasma concentrations at steady state (Cmax,ss) are reported, using the dose at the last visit in the study for participants included in the primary efficacy analysis.

Time frame: Up to 8 weeks

Number of Participants With at Least 1 Serious Adverse Event (Safety and Tolerability)

The number of participants with at least one serious adverse event, regardless of causality is reported cumulatively through Week 8. A summary of serious and other non-serious adverse events regardless of causality is located in the Reported Adverse Event module.

Time frame: Baseline through Week 8

Change From Baseline to Week 8 in the 21-item Hamilton Depression Rating Scale (HAM-21) Total Score

The HAMD-21 is a 21-item assessment used to measure depression severity. Items were rated on a scale from 0 (symptoms not present) to a maximum of 2 to 4 (symptom extremely severe) for a total score ranging from 0 (not at all depressed) to 60 (severely depressed). Least Squares (LS) means were calculated using mixed model repeated measures (MMRM) adjusting for treatment, investigator, visit, baseline score, treatment-by-visit, and baseline score-by-visit.

Time frame: Baseline, Week 8

Cognitive Assessment Battery: Change From Baseline in Word List Learning and Delayed Recall Test (WLDRT) up to Week 8 Endpoint

The WLDRT is a test of visual learning and recall. Participants are shown a series of words (commonly used nouns) and asked to say each of the words aloud, then are asked to recall the words and the total number of correct words recalled is recorded (possible score ranged from 0 to 15 words). The process is repeated 3 times. The Word List Learning Test score is calculated as the average number of words recalled during the first 3 trials. After a 30-minute delay, participants are again asked to recall the words, and the total number of correct words remembered after the delay is recorded as the Delayed Recall Test score. The baseline value was the last non-missing value before the first randomized double-blind study drug administration. Least Squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to week 8

Cognitive Assessment Battery: Change From Baseline in Symbol Digit Substitution Test (SDST) up to Week 8 Endpoint

The SDST is an attention-demanding psychomotor component based on the Digit Symbol Substitution Test from the Wechsler Adult Intelligence Scale. The participant is given a symbol/digit code in which each of the digits 1 through 9 is paired with a different symbol. Below the code, a series of symbols selected from those in the code are presented in an irregular order. The participant is instructed to write the number that is appropriate for each symbol in the space below each symbol and to complete as many correct digits as possible within a 90-second test period. For this test, the number of attempts and number of correct digits is collected. The percentage of correct digits is presented based on the number of correct digits divided by the number of attempts, multiplied by 100 (score ranged from 0 to 100% correct). Least squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to Week 8

Cognitive Assessment Battery: Change From Baseline in Two Digit Cancellation Test up to Week 8 Endpoint

The Two Digit Cancellation Test (2DCT) is a clinical adaptation of the visual search tasks that have been used to investigate cognitive processes involved in attention and visual information processing. For this test, the participant is presented with a piece of paper containing rows of digits. At the top of the page are two target digits. The participant is instructed to examine each row of digits working from top to bottom and left to right crossing off each number that matches either of the two numbers at the top of the page. The number of targets hit, number of errors, and number of times the participant had to be reminded of the task are recorded for the 45-second test. The 2DCT composite cognitive score is calculated as the number of targets hit - number of errors - number of reminders. 2DCT score ranges 0-40 with higher score indicating better cognition. Least squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to Week 8

Cognitive Assessment Battery: Change From Baseline in Trail Making A up to Week 8 Endpoint

Trail Making A is a neurocognitive test associated with general brain function. While being timed, the participant is instructed to connect 25 randomly placed circled numbers on a page in numerical sequence without lifting their pencil. If a participant makes a mistake, the mistake is pointed out and the participant must start again from the last correct circle. The total time to complete the task (up to 300 seconds, with a lower value indicating better brain function) is recorded. Least squares (LS) means were adjusted for treatment, investigator, and baseline score.

Time frame: Baseline, up to Week 8