Florbetaben (BAY94-9172) PET (Positron Emission Tomography) Imaging in MCI (Mild Cognitive Impairment) Patients
Drug: Florbetaben (BAY94-9172)
|Study Design:||Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
|Official Title:||ß-amyloid Imaging With BAY94-9172 Positron Emission Tomography for Early Detection of Alzheimer's Disease in Patients With Mild Cognitive Impairment|
- Quantitative Assessment of Neocortical SUVRs (Mean Standard Uptake Value Ratios) as a Measure of Florbetaben Uptake [ Time Frame: 1 scanning period post injection to be evaluated at baseline, 12 months and 24 months ]Mean SUVRs were calculated for subjects who did and did not progress to Alzheimer's Disease (AD) during the study for each PET scan time point (baseline, 12 and 24 months)
- Number of Normal and Abnormal Scans in Patients With MCI Progressing to AD and Those Who do Not Progress Based on a Threshold of Neocortical SUVR=1.4 [ Time Frame: 1 scanning period post injection to be evaluated at baseline, at 12 months and at 24 months ]This outcome measure showed the number of abnormal scans in subjects with MCI progressing to AD and those who did not progress compared to subjects with normal scans that did not progress and those who did progress.
- Number and Proportion of Normal and Abnormal Scans Based on Brain ß-amyloid Plaque Load (BAPL) in Subjects With MCI Converting to AD and Those Who do Not Progress [ Time Frame: 2 scanning periods post injection to be evaluated each at baseline, at 12 months, and at 24 months ]At each study time point (baseline, 12 months and 24 months) PET images were obtained at 45 min and again at 90 post injection. These images were assigned a BAPL score of 1, 2 or 3 based on the reader's evaluation of the scan. A BAPL scores of 1 was considered normal, and scores of 2 and 3 were considered abnormal. These scores were compared to subjects clinical diagnosis for AD at the end of the study follow up period.
- Sensitivity/Specificity/Negative Predictive Value (NPV)/Positive Predictive Value (PPV) at Baseline, 12, and 24 Months in the Detection of Significant Brain ß-amyloid Plaque Load in Patients With MCI Progressing to AD Compared to Those Who do Not Progress [ Time Frame: 2 scanning periods post injection to be evaluated at baseline ]
Sensitivity, specificity, NPV and PPV were measured based on subject BAPL scores by time point and imaging window, compared to clinical diagnosis of AD during the study period. A BAPL score of 1 was considered negative for the presence of beta-amyloid, and scores of 2 and 3 were considered positive.
For this study, sensitivity was defined as the percentage of subjects with a clinical diagnosis of AD who also had a positive PET scan (BAPL score of 2 or 3) at the respective time point.
Specificity was defined as the percentage of subjects with a clinical diagnosis of non-AD who also had a negative PET scan (BAPL score of 0 or 1) at the respective time point.
PPV was defined as the probability that a subject with a positive PET scan would have a clinical diagnosis of AD sometime during the 2 year follow up period.
NPV was defined as the probability that a subject with a negative PET scan would not have a clinical diagnosis of AD at any point during the 2 year follow up period.
|Study Start Date:||June 2008|
|Study Completion Date:||December 2011|
|Primary Completion Date:||December 2011 (Final data collection date for primary outcome measure)|
|Experimental: Arm 1||
Drug: Florbetaben (BAY94-9172)
single 300 megabecquerel (MBq) intravenous injection 2 mL to 10 mL, at baseline, at 12 and 24 months
Please refer to this study by its ClinicalTrials.gov identifier: NCT01138111
|Heidelberg, Victoria, Australia, 3084|
|Study Director:||Bayer Study Director||Bayer|