Observational Study of Cognitive Outcomes for Subjects Who Have Had Prior PET Amyloid Imaging With Florbetapir F 18 (18F-AV-45)

This study has been completed.
Sponsor:
Information provided by (Responsible Party):
Avid Radiopharmaceuticals
ClinicalTrials.gov Identifier:
NCT00857506
First received: March 5, 2009
Last updated: March 26, 2013
Last verified: March 2013
  Purpose

The primary objective of this protocol is to determine if brain amyloid imaged with florbetapir F 18 (18F-AV-45) PET scans is predictive of progressive cognitive impairment during the subsequent 36 months for groups of: normal controls, mild cognitive impairment and Alzheimer's disease.

Hypothesis 1: The probability a subject will experience progressive cognitive impairment within 36 months of imaging will be greater in subjects whose 18F-AV-45 PET scan was rated amyloid positive compared to subjects whose PET scan was rated amyloid negative.

The secondary objective is to determine the stability, over 36 months of a clinical diagnosis, of AD in patients with an amyloid positive 18F-AV-45 PET.

Hypothesis 2: The diagnosis of AD will remain unchanged in patients whose PET scan were rated as amyloid positive.


Condition Intervention Phase
Alzheimer's Disease
Mild Cognitive Impairment
Drug: florbetapir F 18
Phase 2

Study Type: Interventional
Study Design: Endpoint Classification: Efficacy Study
Intervention Model: Single Group Assignment
Masking: Single Blind (Outcomes Assessor)
Primary Purpose: Diagnostic
Official Title: Longitudinal Study of Long-term (36 Month) Cognitive Outcomes in Healthy Volunteers, Patients With Mild Cognitive Impairment (MCI) and Patients With Alzheimer's Disease (AD) Who Have Previously Had PET Imaging With 18F-AV-45 Injection.

Resource links provided by NLM:


Further study details as provided by Avid Radiopharmaceuticals:

Primary Outcome Measures:
  • Change in ADAS-Cog for MCI Subjects [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    The primary analysis was the comparison in the magnitude of change from baseline in Alzheimer's Disease Assessment Scale cognitive subscale (ADAS-Cog) between Aβ+ and Aβ- subjects in the Mild Cognitive Impairment (MCI) population at 36 months adjusting for baseline test score and age at informed consent. ADAS-Cog scores (range 0-70) indicate performance on a series of 11 cognitive tasks where 0 indicates the highest level of cognitive performance and 70 indicates the lowest level of cognitive performance. Change in ADAS-Cog scores were calculated by subtracting the baseline score from the 36 month score (last observation carried forward [LOCF]). A change in ADAS-Cog greater than 0 indicates a deterioration in cognitive performance whereas a change in ADAS-Cog less than 0 indicates improved cognitive performance.


Secondary Outcome Measures:
  • Cognitive Decline in MCI Subjects [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    The key secondary analyses compared the number of Aβ+ and Aβ- subjects in the MCI population with clinically significant deterioration in ADAS-Cog (≥4) and Clinical Dementia Rating (CDR) global score (≥0.5) and conversion in diagnosis from MCI at baseline to AD or Cognitively Normal (CN) at 36 months. ADAS-Cog scores (range 0-70) indicate performance on a series of 11 cognitive tasks where 0 indicates the highest level of cognitive performance and 70 indicates the lowest level of cognitive performance. CDR scores (range 0-3) quantify the severity of the symptoms of dementia where 0 indicates no cognitive impairment and 3 indicates severe dementia. Changes in ADAS-Cog and CDR scores were calculated by subtracting the baseline score from the 36 month score (LOCF).

  • Change in ADAS-Cog in CN and AD Subjects [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    This analysis compared the magnitude of change from baseline in ADAS cognitive subscale (ADAS-Cog) scores between Aβ+ and Aβ- subjects in the CN and AD populations at 36 months adjusting for baseline test score and age at informed consent. ADAS-Cog scores (range 0-70) indicate performance on a series of 11 cognitive tasks where 0 indicates the highest level of cognitive performance and 70 indicates the lowest level of cognitive performance. Change in ADAS-Cog scores were calculated by subtracting the baseline score from the 36 month score (LOCF). A change in ADAS-Cog greater than 0 indicates a deterioration in cognitive performance whereas a change in ADAS-Cog less than 0 indicates improved cognitive performance.

  • Cognitive Decline in CN and AD Subjects [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    The key secondary analyses compared the number of Aβ+ and Aβ- subjects in the CN and AD populations with clinically significant deterioration in ADAS-Cog (≥4) and CDR global score (≥0.5). ADAS-Cog scores (range 0-70) indicate performance on a series of cognitive tasks where 0 indicates the highest level of cognitive performance and 70 indicates the lowest level of cognitive performance. CDR scores (range 0-3) quantify the severity of the symptoms of dementia where 0 indicates no cognitive impairment and 3 indicates severe dementia. Changes in ADAS-Cog and CDR scores were calculated by subtracting the baseline score from the 36 month score (LOCF).

  • Covariate Adjusted Psychometric Score Change [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    Change from baseline by diagnostic group in covariate-adjusted psychometric assessment scores at month 36 (LOCF). Assessments included Digit Symbol Substitution (DSS), Clinical Dementia Rating Sum of Boxes (CDR-SOB), Mini-Mental State Examination (MMSE), Wechsler Logical Memory Scale (WLMS) delayed and immediate recall, Category Verbal Fluency (CVF) animals and vegetables, Alzheimer's Disease Clinical Studies Consortium Activities of Daily Living (ADCS ADL) and Geriatric Depression Scale (GDS). The ranges for these scales are as follows: DSS (0-93), CDR-SOB (0-18), MMSE (0-30), WLMS delayed and immediate recall (0-25), CVF animals and vegetables (0-total number of relevant items named in 60 seconds), ADCS ADL (0-78) and GDS (0-15). For all scales except CDR-SOB and GDS a higher score indicates greater cognitive function. For CDR-SOB and GDS a higher score indicates increased dementia or depression, respectively.

  • Correlation of Change in ADAS-Cog and SUVR [ Time Frame: Baseline and 36 months ] [ Designated as safety issue: No ]
    Correlation between change from baseline to 36 month ADAS-Cog score and baseline global average SUVR by diagnostic group is provided below. ADAS-Cog scores (range 0-70) indicate performance on a series of 11 cognitive tasks where 0 indicates the highest level of cognitive performance and 70 indicates the lowest level of cognitive performance. Change in ADAS-Cog scores were calculated by subtracting the baseline score from the 36 month score (LOCF). A change in ADAS-Cog greater than 0 indicates a deterioration in cognitive performance whereas a change in ADAS-Cog less than 0 indicates improved cognitive performance. Standard Uptake Value Ratio (SUVR) is the ratio of tracer uptake in the cortex and cerebellum. SUVR values higher than 1 indicate greater amyloid burden in the cortex as compared to the cerebellum whereas scores less than 1 indicate the opposite.


Enrollment: 152
Study Start Date: January 2009
Study Completion Date: December 2011
Primary Completion Date: December 2011 (Final data collection date for primary outcome measure)
Intervention Details:
    Drug: florbetapir F 18
    370 Mega Becquerel (10 mCi)
    Other Names:
    • 18F-AV-45 PET
    • florbetapir F 18
    • amyloid imaging
    • Amyvid
Detailed Description:

Study AV-45-A11 is designed to determine if brain amyloid aggregation imaged on 18F-AV-45 PET scans is predictive of progression of cognitive impairment during the subsequent 36 months. Approximately 180 subjects enrolled in a prior clinical study (AV-45-A05[NCT00702143]) will be offered an opportunity to be studied under this protocol. The initial visit will occur as soon as possible following the AV-45-A05(NCT00702143) imaging day. Subjects who qualify for the study and their caregiver/partners will be contacted approximately 6,12,18,24 and 36 months after PET imaging in study AV-45-A05(NCT00702143), and will undergo a standardized functional and psychometric evaluation.

NOTE: This study is a clinical follow-up of subjects previously enrolled in trial 18F-AV-45-A05(NCT00702143). No new patients are being enrolled in this trial.

  Eligibility

Ages Eligible for Study:   50 Years and older
Genders Eligible for Study:   Both
Accepts Healthy Volunteers:   No
Criteria

Inclusion Criteria:

  • All subjects who enrolled in study AV-45-A05(NCT00702143), received 18F-AV-45, and completed a PET scan will be eligible to enroll in this trial.

Exclusion Criteria:

  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its ClinicalTrials.gov identifier: NCT00857506

Locations
United States, Arizona
Research Site
Scottsdale, Arizona, United States, 85258
Research Site
Tucson, Arizona, United States, 85741
United States, California
Research Site
Costa Mesa, California, United States, 92626
United States, Florida
Research Site
Brooksville, Florida, United States, 34613
Research Site
Hallandale Beach, Florida, United States, 33009
Research Site
West Palm Beach, Florida, United States, 33407
United States, New York
Research Site
Albany, New York, United States, 12208
United States, North Carolina
Research Site
Durham, North Carolina, United States, 27710
Sponsors and Collaborators
Avid Radiopharmaceuticals
Investigators
Study Director: Chief Medical Officer Avid Radiopharmaceuticals
  More Information

No publications provided

Responsible Party: Avid Radiopharmaceuticals
ClinicalTrials.gov Identifier: NCT00857506     History of Changes
Other Study ID Numbers: 18F-AV-45-A11
Study First Received: March 5, 2009
Results First Received: December 31, 2012
Last Updated: March 26, 2013
Health Authority: United States: Food and Drug Administration

Keywords provided by Avid Radiopharmaceuticals:
Cognitive outcome
18F-AV-45 PET scan
Amyloid PET scan
Florbetapir F 18 amyloid PET scan
Normal cognition
Change in cognitive status in relation to brain amyloid on PET

Additional relevant MeSH terms:
Alzheimer Disease
Cognition Disorders
Mild Cognitive Impairment
Dementia
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Tauopathies
Neurodegenerative Diseases
Delirium, Dementia, Amnestic, Cognitive Disorders
Mental Disorders

ClinicalTrials.gov processed this record on September 29, 2014