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

26. März 2013 aktualisiert von: Avid Radiopharmaceuticals

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.

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.

Studienübersicht

Status

Abgeschlossen

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

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.

Studientyp

Interventionell

Einschreibung (Tatsächlich)

152

Phase

  • Phase 2

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

  • Vereinigte Staaten
    • Arizona
      • Scottsdale, Arizona, Vereinigte Staaten, 85258
        • Research Site
      • Tucson, Arizona, Vereinigte Staaten, 85741
        • Research Site
    • California
      • Costa Mesa, California, Vereinigte Staaten, 92626
        • Research Site
    • Florida
      • Brooksville, Florida, Vereinigte Staaten, 34613
        • Research Site
      • Hallandale Beach, Florida, Vereinigte Staaten, 33009
        • Research Site
      • West Palm Beach, Florida, Vereinigte Staaten, 33407
        • Research Site
    • New York
      • Albany, New York, Vereinigte Staaten, 12208
        • Research Site
    • North Carolina
      • Durham, North Carolina, Vereinigte Staaten, 27710
        • Research Site

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

50 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

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:

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Diagnose
  • Zuteilung: N / A
  • Interventionsmodell: Einzelgruppenzuweisung
  • Maskierung: Single

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Change in ADAS-Cog for MCI Subjects
Zeitfenster: Baseline and 36 months
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.
Baseline and 36 months

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Cognitive Decline in MCI Subjects
Zeitfenster: Baseline and 36 months
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).
Baseline and 36 months
Change in ADAS-Cog in CN and AD Subjects
Zeitfenster: Baseline and 36 months
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.
Baseline and 36 months
Cognitive Decline in CN and AD Subjects
Zeitfenster: Baseline and 36 months
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).
Baseline and 36 months
Covariate Adjusted Psychometric Score Change
Zeitfenster: Baseline and 36 months
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.
Baseline and 36 months
Correlation of Change in ADAS-Cog and SUVR
Zeitfenster: Baseline and 36 months
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.
Baseline and 36 months

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Avid Radiopharmaceuticals

Publikationen und hilfreiche Links

Die Bereitstellung dieser Publikationen erfolgt freiwillig durch die für die Eingabe von Informationen über die Studie verantwortliche Person. Diese können sich auf alles beziehen, was mit dem Studium zu tun hat.

Allgemeine Veröffentlichungen

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn

1. Januar 2009

Primärer Abschluss (Tatsächlich)

1. Dezember 2011

Studienabschluss (Tatsächlich)

1. Dezember 2011

Studienanmeldedaten

Zuerst eingereicht

5. März 2009

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

5. März 2009

Zuerst gepostet (Schätzen)

6. März 2009

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Schätzen)

28. März 2013

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

26. März 2013

Zuletzt verifiziert

1. März 2013

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Schlüsselwörter

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • 18F-AV-45-A11

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