Brexpiprazole (OPC-34712) Trial in the Treatment of Adults With Acute Schizophrenia

The PANSS consisted of three subscales: a total of 30 symptom constructs. For each symptom construct, severity was rated on a 7-point scale, with a score of 1 (absence of symptoms) and a score of 7 (extremely severe symptoms). The PANSS total score was the sum of the rating scores for 7 positive scale items, 7 negative scale items, and 16 general psychopathology scale items from the PANSS panel. The PANSS total score ranged from 30 (best possible outcome) to 210 (worst possible outcome).

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a mixed model repeated measures (MMRM) analysis with an unstructured variance covariance structure.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). The results of each domain on the cognitive test battery were calculated into Z-scores, where the healthy control mean was set to zero and the standard deviation to 1. A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement. The cognitive test early phase battery was analyzed; tasks included Groton Maze Learning Task, Detection Task, Identification Task, and One Card Learning Task.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). The results of each domain on the cognitive test battery were calculated into Z-scores, where the healthy control mean was set to zero and the standard deviation to 1. A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). The results of each domain on the cognitive test battery were calculated into Z-scores, where the healthy control mean was set to zero and the standard deviation to 1. A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). The results of each domain on the cognitive test battery were calculated into Z-scores, where the healthy control mean was set to zero and the standard deviation to 1. A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The cognitive test battery contains 8-tasks, including the Detection Task (DET, speed of processing), Identification Task (IDN, attention/vigilance), One Card Learning Task (OCL, visual learning), One-back Memory Task (ONB, working memory), Two Back Task (TWOB, working memory), the Groton Maze Learning Task (GML, problem solving/error monitoring), Social Emotional Cognition Task (SECT, social cognition), International shopping List Task (ISL, verbal learning and memory). The results of each domain on the cognitive test battery were calculated into Z-scores, where the healthy control mean was set to zero and the standard deviation to 1. A composite score was generated, with higher values representing better cognitive performance. The composite score is then the mean of z-scores for appropriate tasks where z-score = - 1 × z-score for DET, GML, IDN and ONB to correct for the direction of improvement.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The BIS-11, a subject-rated scale designed to assess impulsive personality traits, was administered at the baseline and Week 6 visits. The BIS-11 consisted of 30 items scored on a 4-point scale ranging from 1 (rarely/never) to 4 (almost always/always). The scores provided information to assess 6 first-order factors (attention, motor, self-control, cognitive complexity, perseverance, and cognitive instability impulsiveness) and 3 second-order factors (motor impulsiveness, nonplanning impulsiveness, and attentional impulsiveness). The total score ranged from 30 to 120, higher scores indicate better personality trait.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. Analysis was performed on the LOCF dataset.

The SLOF questionnaire used in this trial consisted of 30 items grouped into 4 areas: interpersonal relationships, social acceptability, activities, and work skill. The SLOF correlates with a subject's quality of life. Each of the questions in the domains is rated on a 5-point Likert scale ranging from 1 not well at all to 5 very well. The possible total score range for SLOF is from 30 to 150, higher score indicating better overall functioning of the participant.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. Analysis was performed on the LOCF dataset.

The severity of illness for each participant was rated using the CGI-S. To perform this assessment, the study physician answered the following question: Considering your total clinical experience with this particular population, how mentally ill is the participant at this time? Response choices included: 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; and 7 = among the most extremely ill participants.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. The efficacy analyses were performed by fitting a MMRM analysis with an unstructured variance covariance structure.

The efficacy of trial medication was rated for each participant using the CGI-I. The study physician would rate the participant's total improvement whether or not it is due entirely to drug treatment. All responses were compared to the participant's condition at Baseline prior to the first dose of double-blind study medication. Response choices included: 0 = not assessed, 1 = very much improved, 2 = much improved, 3 = minimally improved, 4 = no change, 5 = minimally worse, 6 = much worse, and 7 = very much worse.

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. Analysis was performed on the LOCF dataset.

The response rate was defined as reduction of ≥30% from Baseline in PANSS Total Score or CGI-I score of of 1 (very much improved) or 2 (much improved).

Time frame: Baseline to Week 6

Population: All randomized participants who took at least one dose of study medication and who had a valid Baseline assessment and at least 1 valid Post-Baseline efficacy assessment. Analysis was performed on the LOCF dataset.