A Study to Evaluate the Efficacy and Safety of ABBV-8E12 in Participants With Early Alzheimer's Disease

Study Overview
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Brief Summary
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This study seeks to evaluate the efficacy and safety of ABBV-8E12 in participants with early Alzheimer's disease (AD).

Official Title
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A Phase 2 Multiple Dose, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of ABBV-8E12 in Subjects With Early Alzheimer's Disease

Conditions
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Alzheimer's Disease

Intervention / Treatment
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* Drug: ABBV-8E12
* Drug: placebo for ABBV-8E12


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Subject who meets the National Institute on Aging and the Alzheimer's Association (NIA-AA) clinical criteria for mild cognitive impairment or probable AD, and have: Clinical Dementia Rating (CDR)-Global Score of 0.5 Mini-Mental State Examination (MMSE) score of 22 to 30, inclusive Repeatable Battery for the Assessment of Neuropsychological Status-Delayed Memory Index (RBANS - DMI) score of 85 or lower Subject has a positive amyloid positron emission tomography (PET) scan. Subject has a Modified Hachinski Ischemic Scale (MHIS) score of ≤ 4. The subject has an identified, reliable, study partner (e.g., family member). If using medications to treat symptoms related to AD, doses must be stable for at least 12 weeks prior to randomization. Exclusion Criteria: Subject has any contraindications or inability to tolerate brain magnetic resonance imaging (MRI), PET scans or lumbar puncture. Subject has evidence of any other clinically significant neurological disorder other than early AD. In the opinion of the investigator, the subject has any clinically significant or uncontrolled medical or psychiatric illness, or has had an infection requiring medical intervention in the past 30 days. Subject has had a myocardial infarction, unstable angina, stroke, transient ischemic attack or required intervention for any of these conditions within 6 months of Screening.

Ages Eligible for Study
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Minimum Age: 55 Years
Maximum Age: 85 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Placebo Comparator: Placebo<br>Placebo for ABBV-8E12 every 4 weeks for 96 weeks | Drug: placebo for ABBV-8E12<br>* placebo solution for intravenous (IV) infusion<br>|
| Experimental: ABBV-8E12 300 mg<br>ABBV-8E12 300 mg every 4 weeks for 96 weeks | Drug: ABBV-8E12<br>* ABBV-8E12 solution for IV infusion<br>* Other names: Tilavonemab;|
| Experimental: ABBV-8E12 1000 mg<br>ABBV-8E12 1000 mg every 4 weeks for 96 weeks | Drug: ABBV-8E12<br>* ABBV-8E12 solution for IV infusion<br>* Other names: Tilavonemab;|
| Experimental: ABBV-8E12 2000 mg<br>ABBV-8E12 2000 mg every 4 weeks for 96 weeks | Drug: ABBV-8E12<br>* ABBV-8E12 solution for IV infusion<br>* Other names: Tilavonemab;|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Change From Baseline Over Time in CDR-SB Score | The CDR-SB is a numeric scale used to quantify the severity of symptoms of dementia. A qualified health professional assesses a participant's cognitive and functional performance in 6 areas: memory, orientation, judgment and problem solving, community affairs, home and hobbies, and personal care. The CDR scale gives a score from 0 to 3 for each of the 6 areas, with a lower value being desirable. The sum of these 6 areas, the CDR-SB score, can range from 0 to 18, with a lower value being desirable. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Number of Participants With Treatment Emergent Adverse Events (TEAEs) | A TEAE was defined as an adverse event (AE) that began on or after the first study drug dose date and no more than 20 weeks after the last dose of study drug. An adverse event (AE) was defined as any untoward medical occurrence which does not necessarily have a causal relationship with this treatment. Serious AEs (SAEs) were defined as an event that results in death, is life-threatening, results in hospitalization or prolongs hospitalization, is a congenital abnormality, results in persistent or significant disability/incapacity, or is an important medical event. Events were rated in severity as mild, moderate, or severe, and were categorized as having a reasonable possibility or no reasonable possibility of relationship to study drug. | From first dose of study drug up to last dose of study drug plus 20 weeks (up to Week 112) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum Observed Serum Concentration (Cmax) for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses |  | Day 1 (Dose 1): Pre-infusion, post-infusion (within 15 minutes), 1 and 2 hours post-infusion; Days 5 and 15. Day 85 (Dose 4): Pre-infusion (0 hour), post-infusion (within 15 minutes) and 1 and 2 hours post-infusion; Days 89 and 99. | 
| Time to Cmax (Tmax) for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses |  | Day 1 (Dose 1): Pre-infusion, post-infusion (within 15 minutes), 1 and 2 hours post-infusion; Days 5 and 15. Day 85 (Dose 4): Pre-infusion (0 hour), post-infusion (within 15 minutes) and 1 and 2 hours post-infusion; Days 89 and 99. | 
| Serum Concentration at the End of a Dose Interval (Ctrough) for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses |  | Day 1 (Dose 1): Pre-infusion, post-infusion (within 15 minutes), 1 and 2 hours post-infusion; Days 5 and 15. Day 85 (Dose 4): Pre-infusion (0 hour), post-infusion (within 15 minutes) and 1 and 2 hours post-infusion; Days 89 and 99. | 
| Half-Life (T1/2) for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses | Harmonic mean is presented in the data table. | Day 1 (Dose 1): Pre-infusion, post-infusion (within 15 minutes), 1 and 2 hours post-infusion; Days 5 and 15. Day 85 (Dose 4): Pre-infusion (0 hour), post-infusion (within 15 minutes) and 1 and 2 hours post-infusion; Days 89 and 99. | 
| Area Under the Concentration-Time Curve From Dosing (Time 0) to Day 28 (AUC0-28) for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses | The AUC0-28 for Dose 1 included the following timepoints: pre-infusion, post-infusion (within 15 min), 1 and 2 hours post-infusion, Day 5, Day 15 and Day 29 (trough level before Dose 2). The AUC0-28 for Dose 4 included the following timepoints: Day 85 pre-infusion, post-infusion (within 15 min), 1 and 2 hours post-infusion, Day 89, Day 99 and Day 113 (trough level before Dose 5). | Day 1 (Dose 1): pre-infusion, up to Day 29 (trough level before Dose 2). Day 85 (Dose 4): pre-infusion, up to Day 113 (trough level before Dose 5). See Outcome Measure description above for complete time point details. | 
| Cmax/Dose for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses |  | Day 1 (Dose 1): Pre-infusion, post-infusion (within 15 minutes), 1 and 2 hours post-infusion; Days 5 and 15. Day 85 (Dose 4): Pre-infusion (0 hour), post-infusion (within 15 minutes) and 1 and 2 hours post-infusion; Days 89 and 99. | 
| AUC0-28/Dose for ABBV-8E12 Over the Dosing Interval After the First and Fourth Doses | The AUC0-28/dose for Dose 1 included the following timepoints: pre-infusion, post-infusion (within 15 min), 1 and 2 hours post-infusion, Day 5, Day 15 and Day 29 (trough level before Dose 2). The AUC0-28/dose for Dose 4 included the following timepoints: Day 85 pre-infusion, post-infusion (within 15 min), 1 and 2 hours post-infusion, Day 89, Day 99 and Day 113 (trough level before Dose 5). | Day 1 (Dose 1): pre-infusion, up to Day 29 (trough level before Dose 2). Day 85 (Dose 4): pre-infusion, up to Day 113 (trough level before Dose 5). See Outcome Measure description above for complete time point details. | 
| Change From Baseline Over Time in Alzheimer's Disease Assessment Scale (14-Item) Cognition Portion (ADAS-Cog-14) Total Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in mild cognitive impairment (MCI) patients. The Total Score of the ADAS-Cog-14 ranges from 0 to 90, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Comprehension of Spoken Language Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Comprehension of Spoken Language score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Constructional Praxis Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Constructional Praxis Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Commands Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Commands Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Delayed Word Recall Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Delayed Word Recall Score of the ADAS-Cog-14 ranges from 0 to 10, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Ideational Praxis Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Ideational Praxis Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Maze Task Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Maze Task Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Number Cancellation Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Number Cancellation Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Naming Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Naming Score of the ADAS-Cog-14 ranges from 0 to 5 with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Orientation Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Orientation Score of the ADAS-Cog-14 ranges from 0 to 8, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Word Recall - Number of Words Not Recalled Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Word Recall - Number of Words Not Recalled Score of the ADAS-Cog-14 ranges from 0 to 10, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Remember Word Recognition Instructions Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Remember Word Recognition Instructions Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Spoken Language Ability Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Spoken Language Ability Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Word Find Difficulty Spontaneous Speech Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Word Find Difficulty Spontaneous Speech Score of the ADAS-Cog-14 ranges from 0 to 5, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in ADAS-Cog-14 Word Recognition Score | The ADAS-Cog was designed to assess the cognitive impairments most common in AD. The ADAS-Cog-14 includes the original 11 items from the ADAS-Cog-11 [1. Spoken language ability, 2. Comprehension of spoken language, 3. Recall of test instructions, 4. Word-findings difficulty in spontaneous speech, 5. Following commands, 6. Naming objects and fingers, 7. Constructional praxis, 8. Ideational praxis, 9. Orientation, 10. Word-recall task, 11. Word-recognition task] and includes 3 additional tasks [12. Number cancellation task, 13. Delayed word recall task, 14. Executive functioning], for increased sensitivity in MCI patients. The Word Recognition Score of the ADAS-Cog-14 ranges from 0 to 12, with a higher score representing greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in Functional Activities Questionnaire (FAQ) Score | The FAQ measures level of assistance (functional disability) needed for carrying out instrumental activities in daily living (iADLs). The FAQ score ranges from 0 - 30 and consists of 10 items (each scored from 0 - 3), which measure a specific iADL in the past 4-weeks: [1) writing checks, paying bills, keeping financial records; 2) assembling tax or business records; 3) shopping alone; 4) playing a game of skill; 5) making coffee or tea; 6) preparing a balanced meal; 7) keeping track of current events; 8) attending to and understanding a television program, book, or magazine; 9) remembering appointments, family occasions, medications; and 10) traveling out of the neighborhood]. Performance in each category is rated from 0 - 3 as follows: 0 - normal; 1 - has difficulty, but does by self; 2 - requires assistance; or 3 - dependent. The FAQ was administered by a trained interviewer. Higher scores indicate a greater requirement of assistance. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in Alzheimer's Disease Cooperative Study Clinical Global Impression of Change for Mild Cognitive Impairment (ADCS-CGIC-MCI) General Condition Score | The instrument assesses the physician's global impression of change in 4 major cognitive domains. The instrument covers 4 major domains: 1. General condition , 2. Cognition, 3. Behavior, and 4. Social and daily functioning. Scoring is based on a 7-point Likert Scale: 1, marked improvement; 2, moderate improvement; 3, minimal improvement; 4, no change; 5, minimal worsening; 6, moderate worsening; 7, marked worsening. Higher score indicates greater worsening. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in ADCS-CGIC-MCI Cognition Score | The instrument assesses the physician's global impression of change in 4 major cognitive domains. The instrument covers 4 major domains: 1. General condition , 2. Cognition, 3. Behavior, and 4. Social and daily functioning. Scoring is based on a 7-point Likert Scale: 1, marked improvement; 2, moderate improvement; 3, minimal improvement; 4, no change; 5, minimal worsening; 6, moderate worsening; 7, marked worsening. Higher score indicates greater worsening. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in ADCS-CGIC-MCI Behavior Score | The instrument assesses the physician's global impression of change in 4 major cognitive domains. The instrument covers 4 major domains: 1. General condition , 2. Cognition, 3. Behavior, and 4. Social and daily functioning. Scoring is based on a 7-point Likert Scale: 1, marked improvement; 2, moderate improvement; 3, minimal improvement; 4, no change; 5, minimal worsening; 6, moderate worsening; 7, marked worsening. Higher score indicates greater worsening. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in ADCS-CGIC-MCI Functional Abilities Score | The instrument assesses the physician's global impression of change in 4 major cognitive domains. The instrument covers 4 major domains: 1. General condition , 2. Cognition, 3. Behavior, and 4. Social and daily functioning (functional abilities). Scoring is based on a 7-point Likert Scale: 1, marked improvement; 2, moderate improvement; 3, minimal improvement; 4, no change; 5, minimal worsening; 6, moderate worsening; 7, marked worsening. Higher score indicates greater worsening. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in University of California's Performance Based Skills Assessment, Brief Version (UPSA-Brief) - Total Score | The UPSA-Brief is a performance-based instrument which uses a series of tasks and roleplay scenarios to evaluate a person's functional capacity in two areas of basic living skills (i.e., financial skills and communication skills). Scores range from 0 to 100; a higher score of the UPSA-Brief is desirable. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in 24-Item Alzheimer's Disease Cooperative Study/Activities of Daily Living Scale Adapted for Patients With Mild Cognitive Impairment (ADCS-MCI-ADL-24) Total Score | The ADCS-MCI-ADL-24 is a 24-item, study partner-based assessment of activities of daily living designed specifically for AD patients and is completed by a trained rater. The scale assesses functional activities such as cooking, household chores, shopping, keeping appointments, social interactions and hobbies. Items are assessed according to whether they were performed in the past 4 weeks and, if so, some items are further assessed as to whether they were performed independently, with supervision, or with physical help. Scores on the ADCS-ADL-MCI range from 0 to 69, where higher score indicates greater capability to carry out activities of daily living. | Baseline, Week 48, Week 96 | 
| Change From Baseline Over Time in Repeatable Battery for Assessment of Neuropsychological Status (RBANS) - Total Scale Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. Total score can range from 40 to 160 with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Coding Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Coding Total Score of the RBANS ranges from 0 to 89, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Digit Span Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Digit Span Total Score of the RBANS ranges from 0 to 8, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Figure Copy Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Figure Copy Total Score of the RBANS ranges from 0 to 20, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Figure Recall Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Figure Recall Total Score of the RBANS ranges from 0 to 18, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - List Recognition Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The List Recognition Total Score of the RBANS ranges from 0 to 20, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - List Learning Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The List Learning Total Score of the RBANS ranges from 0 to 40, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Line Orientation Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Line Orientation Total Score of the RBANS ranges from 0 to 20, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - List Recall Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The List Recall Total Score of the RBANS ranges from 0 to 10, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Picture Naming Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Picture Naming Total Score of the RBANS ranges from 0 to 10, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Semantic Fluency Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Semantic Fluency Total Score of the RBANS ranges from 0 to 40, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Story Memory Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Story Memory Total Score of the RBANS ranges from 0 to 24, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in RBANS - Story Recall Total Score | The RBANS is a 25-minute, standardized neurocognitive battery with North American population-based normative data. The RBANS measures five neurocognitive domains, with age-based scaling. Twelve subtests measure cognitive decline or improvement across the following domains: 1. Immediate Memory - List Learning and Story Memory, 2. Visuospatial/Constructional - Figure Copy and Line Orientation, 3. Language - Picture naming and Semantic Fluency, 4. Attention - Digit Span and Coding, and 5. Delayed Memory - List Recall, List Recognition, Story Memory, and Figure Recall. The Story Recall Total Score of the RBANS ranges from 0 to 12, with a higher score representing a better outcome. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in Mini-Mental State Examination (MMSE) Total Score | The MMSE is a brief, 30-point questionnaire, administered by a trained rater, which provides a quantitative measure of cognitive status in adults and is widely used to screen for cognitive impairment and to estimate the severity of cognitive impairment at a given point in time in AD participants. The MMSE ranges from 0 to 30, with lower scores indicating greater impairment. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in Neuropsychiatry Inventory (NPI) Total Score | The NPI is used to assess changes in the participant's behavior that occurred in a defined period of time (4 weeks). The NPI assesses 12 behavioral domains on the dimensions of frequency and severity. Frequency is rated on a scale where 0 = absent, 1 = occasionally, 2 = often, 3 = frequently, 4 = very frequently. Severity is rated on a scale where 0 = absent, 1 = mild, 2 = moderate, 3 = severe. For each of the domains, 3 scores are obtained: frequency, severity, and total (product of frequency and severity; ranges from 0 to 12, with a lower score desirable). A total NPI score can be calculated by summing the domain total scores. Total Score ranges from 0 to 144 with a lower score desirable. | Baseline, Week 24, Week 48, Week 72, Week 96 | 
| Change From Baseline Over Time in Alzheimer's Disease Composite Score (ADCOMS) Score | ADCOMS score is a composite score which is a weighted linear combination of the selected individual scale items from ADAS-Cog-14 (see description in Outcome Measure 10) , MMSE (see description in Outcome Measure 45), and CDR-SB (see description in Outcome Measure 1) scales. The ADCOMS score ranges from 0 to 1.97, with a lower score desirable. | Baseline, Week 24, Week 48, Week 72, Week 96 | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Early Alzheimer's Disease (AD), Mild Cognitive Impairment (MCI), Mild Alzheimer's Disease (AD), Tau, Early dementia, Tauopathies, AD, Neurodegenerative diseases, Memory loss, Nervous system diseases