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Comparative Research of Alzheimer's Disease Drugs

Comparative Effectiveness Research Trial of Alzheimer's Disease Drugs

Status
Terminated
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01362686
Acronym
COMET-AD
Enrollment
200
Registered
2011-05-30
Start date
2011-04-30
Completion date
2015-10-31
Last updated
2017-02-27

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Alzheimer's Disease, Dementia

Keywords

diagnosis of Alzheimer's disease, medication adherence

Brief summary

Conduct a comparative effectiveness clinical trial of medication treatment for behavioral symptoms of Alzheimer's disease in a group of real-world memory care clinics with enhanced access to the Indiana Network for Patient Care.

Detailed description

The overarching goal of this proposal is to enhance the existing information technology infrastructure in Central Indiana to improve the nation's capacity to conduct comparative effectiveness research (CER). Consistent with the instructions in RFA-HS-10-005, the investigators propose to apply these new capacities to a novel CER project evaluating treatment for Alzheimer's disease. Alzheimer's disease has been identified as a first quartile CER priority. This proposal represents collaboration between the Medical Informatics Program at the Regenstrief Institute, Inc (a world leader in health information technology) and two Indiana University research programs: the Center for Aging Research and the Division of Clinical Pharmacology. These programs have an established track record in research relevant to under-served populations. Thus, this proposal combines considerable investigator, environment, and research strengths to continue to build a novel CER infrastructure in support of the nation's evidentiary CER priorities. Throughout this proposal, the investigators use the AHRQ definition of CER: the conduct and synthesis of research comparing the benefits and harms of different interventions and strategies to prevent, diagnose, treat and monitor health conditions in real world settings. The investigators also refer to a clinical trial of medication treatment for behavioral symptoms of Alzheimer's disease as the specific CER proposed to demonstrate the potential of our new infrastructure. However, the investigators stress that the enhancements proposed to existing infrastructure would support a broad portfolio of CER across an array of priority conditions. The investigators are also proposing enhancements in our privacy and confidentiality technology that would allow researchers from across the country to access de-identified data in support of CER. In summary, the investigators are proposing to add new CER knowledge on Alzheimer' disease and thereby field test new information technology capacities important to a wide range of CER projects while also increasing our capacity to provide data and opportunities for nationwide CER. The derivation of meaningful and actionable evidence from CER ultimately depends on capturing relevant, comprehensive and accurate data about treatment decisions, patients' clinical status, their care processes and environment, and the health outcomes they experience and value. Such data must be tracked longitudinally in order to determine temporal relationships, cause-effect paradigms, and the efficacy of specific clinical interventions in the context of other conditions, interventions, and goals of care. At Indiana University and the Regenstrief Institute, the investigators have four decades of experience and a well-documented, world-class clinical informatics and research infrastructure for capturing, storing, querying and analyzing treatment patterns and patients' clinical outcomes. The maturation of this health information technology is now embodied within the Indiana Network for Patient Care (INPC), a fully-operational regional health information exchange. The investigators are well positioned to expand and leverage this infrastructure in support of local and national multi-site clinical trials in comparative effectiveness. The specific aims of this proposal are to: 1.0 PROSPECT STUDY: Enhance our existing information technology infrastructure to: 1. provide de-identified access to the INPC database for CER work 2. capture, store, and track a broader array of health care outcomes important to patients and their caregivers (e.g. behavioral symptoms due to dementia); 3. support providers' and caregivers' and researchers' increasing need to work in teams by providing new tools for communication and co-management (e.g. collaborative care and research) 2.0 COMET-AD STUDY: Conduct comparative effectiveness clinical trial of medication treatment for behavioral symptoms of Alzheimer's disease in a group of real-world memory care clinics with enhanced access to the Indiana Network for Patient Care.

Interventions

DRUGDonepezil

The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.

DRUGGalantamine

The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.

DRUGRivastigmine

The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.

Sponsors

Agency for Healthcare Research and Quality (AHRQ)
CollaboratorFED
Indiana University
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
65 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* older adults with a diagnosis of possible or probable Alzheimer's disease * planning to initiate treatment with a cholinesterase inhibitor * planning to continue care in the memory care practice * participation by a family caregiver willing to complete the study outcome assessments * access to a telephone * ability to understand English-Language survey instruments

Exclusion criteria

• prior serious adverse event from the study medications

Design outcomes

Primary

MeasureTime frameDescription
Discontinuation Rates6, 12, and 18 week interviews from enrollmentWe are not seeking to establish efficacy of these three medications for the indication of Alzheimer's disease. Each of these medications already has FDA-approval for Alzheimer's. The primary outcome measure is the discontinuation rate among the three medications. Based on previous systematic reviews, these rates are reportedly in the range of 30% by 12 weeks compared with placebo. We will determine the approximate date of discontinuation by self-reports from the caregiver through the telephone-based interview at 6, 12, and 18 weeks.

Secondary

MeasureTime frameDescription
Neuropsychiatric Inventory (NPI)Baseline, 6, 12, 18 week interviews from enrollmentThe NPI is based on a structured interview administered to an informal caregiver and has been adopted by the Alzheimer's Disease Cooperative Studies Group to obtain information on the presence of psychopathology in behavioral areas including delusions, apathy, hallucinations, disinhibition, agitation, depression, aberrant motor behavior, anxiety, night-time behavior, and euphoria.9 For each of 12 symptoms, if the caregiver reports the presence of psychopathology, a frequency and severity score are multiplied to yield a possible item score range of 0-12, and a possible total score range of 0-144. The NPI can be used to assess changes in the patient's behavior over the past month. The NPI also assesses the level of caregiver distress attributable to each of the 12 patient behaviors, with a possible total caregiver distress score range of 0-60. Higher scores indicate higher severity of psychopathology and caregiver disress. The NPI has excellent reliability and validity.
Healthy Aging Brain Care (HABC)-Monitorbaseline, 6, 12, and 18 week interviewsThe current HABC-Monitor includes 30 items covering four clinically relevant domains of dementia, ie, cognitive, functional, behavioral, and psychological symptoms, and caregiver quality of life. For brevity and practical use in the clinical setting, each item on the four scales was designed to have the same item response options consisting of four categories that use the frequency of the target problem in the past 2 weeks. The HABC- Monitor took approximately 6 minutes to complete. The scores of the four scales are summed to create the total scores which were used in this analysis.The higher the total score, the higher the level of self reported caregiver burden. The minimum score is 0 and the maximum score is 90.

Countries

United States

Participant flow

Recruitment details

Recruitment took place from 2011-2014. Recruitment took place in geriatric and memory care specialty clinics in an urban setting. Registered nurses, nurse practitioners, and research assistants completed the recruitment and informed consent procedures.

Pre-assignment details

The enrollment goal in the original protocol of the study was 200 patient-caregiver dyads. 200 were enrolled, but it was discovered that 4 dyads were ineligible after enrollment and were not randomized or included in the study which brings the total enrollment to 196. Recruitment was then terminated due to low enrollment rate.

Participants by arm

ArmCount
Donepezil
See intervention note. Donepezil: The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.
67
Galantamine
See intervention note. Galantamine: The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.
66
Rivastigmine
See intervention note. Rivastigmine: The study is open-label and the memory care practice physicians will make determinations about initial drug dosage and any dosage changes and the timing of those changes. These physicians will also make the determination about whether to switch to a different anti-dementia drug, add memantine, or any other agent. We will, of course, monitor the frequency and content of such changes in the natural course of patient care.
63
Total196

Baseline characteristics

CharacteristicDonepezilGalantamineRivastigmineTotal
Age, Continuous79.1 years
STANDARD_DEVIATION 7.6
80.1 years
STANDARD_DEVIATION 9.6
81.6 years
STANDARD_DEVIATION 7.8
80.2 years
STANDARD_DEVIATION 8.4
Gender
Female
19 Participants20 Participants12 Participants51 Participants
Gender
Male
48 Participants46 Participants51 Participants145 Participants

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
EG002
affected / at risk
deaths
Total, all-cause mortality
— / —— / —— / —
other
Total, other adverse events
40 / 5942 / 5435 / 53
serious
Total, serious adverse events
32 / 5929 / 5427 / 53

Outcome results

Primary

Discontinuation Rates

We are not seeking to establish efficacy of these three medications for the indication of Alzheimer's disease. Each of these medications already has FDA-approval for Alzheimer's. The primary outcome measure is the discontinuation rate among the three medications. Based on previous systematic reviews, these rates are reportedly in the range of 30% by 12 weeks compared with placebo. We will determine the approximate date of discontinuation by self-reports from the caregiver through the telephone-based interview at 6, 12, and 18 weeks.

Time frame: 6, 12, and 18 week interviews from enrollment

ArmMeasureValue (NUMBER)
DonepezilDiscontinuation Rates26 participants
GalantamineDiscontinuation Rates35 participants
RivastigmineDiscontinuation Rates37 participants
Secondary

Healthy Aging Brain Care (HABC)-Monitor

The current HABC-Monitor includes 30 items covering four clinically relevant domains of dementia, ie, cognitive, functional, behavioral, and psychological symptoms, and caregiver quality of life. For brevity and practical use in the clinical setting, each item on the four scales was designed to have the same item response options consisting of four categories that use the frequency of the target problem in the past 2 weeks. The HABC- Monitor took approximately 6 minutes to complete. The scores of the four scales are summed to create the total scores which were used in this analysis.The higher the total score, the higher the level of self reported caregiver burden. The minimum score is 0 and the maximum score is 90.

Time frame: baseline, 6, 12, and 18 week interviews

ArmMeasureGroupValue (MEAN)Dispersion
DonepezilHealthy Aging Brain Care (HABC)-MonitorBaseline HABC18.76 units on a scaleStandard Deviation 13.64
DonepezilHealthy Aging Brain Care (HABC)-Monitor6 Week HABC18.61 units on a scaleStandard Deviation 15.16
DonepezilHealthy Aging Brain Care (HABC)-Monitor12 Week HABC16.04 units on a scaleStandard Deviation 13.41
DonepezilHealthy Aging Brain Care (HABC)-Monitor18 Week HABC16.90 units on a scaleStandard Deviation 15.3
GalantamineHealthy Aging Brain Care (HABC)-Monitor18 Week HABC19.92 units on a scaleStandard Deviation 14.28
GalantamineHealthy Aging Brain Care (HABC)-MonitorBaseline HABC18.34 units on a scaleStandard Deviation 11.91
GalantamineHealthy Aging Brain Care (HABC)-Monitor12 Week HABC18.00 units on a scaleStandard Deviation 15.71
GalantamineHealthy Aging Brain Care (HABC)-Monitor6 Week HABC19.16 units on a scaleStandard Deviation 12.72
RivastigmineHealthy Aging Brain Care (HABC)-Monitor18 Week HABC15.80 units on a scaleStandard Deviation 9.01
RivastigmineHealthy Aging Brain Care (HABC)-Monitor6 Week HABC16.43 units on a scaleStandard Deviation 10.52
RivastigmineHealthy Aging Brain Care (HABC)-Monitor12 Week HABC13.63 units on a scaleStandard Deviation 9.34
RivastigmineHealthy Aging Brain Care (HABC)-MonitorBaseline HABC16.61 units on a scaleStandard Deviation 11.49
Secondary

Neuropsychiatric Inventory (NPI)

The NPI is based on a structured interview administered to an informal caregiver and has been adopted by the Alzheimer's Disease Cooperative Studies Group to obtain information on the presence of psychopathology in behavioral areas including delusions, apathy, hallucinations, disinhibition, agitation, depression, aberrant motor behavior, anxiety, night-time behavior, and euphoria.9 For each of 12 symptoms, if the caregiver reports the presence of psychopathology, a frequency and severity score are multiplied to yield a possible item score range of 0-12, and a possible total score range of 0-144. The NPI can be used to assess changes in the patient's behavior over the past month. The NPI also assesses the level of caregiver distress attributable to each of the 12 patient behaviors, with a possible total caregiver distress score range of 0-60. Higher scores indicate higher severity of psychopathology and caregiver disress. The NPI has excellent reliability and validity.

Time frame: Baseline, 6, 12, 18 week interviews from enrollment

ArmMeasureGroupValue (MEAN)Dispersion
DonepezilNeuropsychiatric Inventory (NPI)6 WeekNPI Patient12.71 units on a scaleStandard Deviation 17.1
DonepezilNeuropsychiatric Inventory (NPI)6 Week NPI Caregiver5.94 units on a scaleStandard Deviation 9.09
DonepezilNeuropsychiatric Inventory (NPI)12 Week NPI Patient9.62 units on a scaleStandard Deviation 13.56
DonepezilNeuropsychiatric Inventory (NPI)12 Week NPI Caregiver5.66 units on a scaleStandard Deviation 7.34
DonepezilNeuropsychiatric Inventory (NPI)18 Week NPI Patient9.06 units on a scaleStandard Deviation 13.87
DonepezilNeuropsychiatric Inventory (NPI)18 Week NPI Caregiver5.56 units on a scaleStandard Deviation 7.66
GalantamineNeuropsychiatric Inventory (NPI)18 Week NPI Caregiver6.22 units on a scaleStandard Deviation 7.56
GalantamineNeuropsychiatric Inventory (NPI)6 WeekNPI Patient9.42 units on a scaleStandard Deviation 13.21
GalantamineNeuropsychiatric Inventory (NPI)12 Week NPI Caregiver4.33 units on a scaleStandard Deviation 6.01
GalantamineNeuropsychiatric Inventory (NPI)18 Week NPI Patient10.67 units on a scaleStandard Deviation 13.85
GalantamineNeuropsychiatric Inventory (NPI)6 Week NPI Caregiver4.40 units on a scaleStandard Deviation 5.8
GalantamineNeuropsychiatric Inventory (NPI)12 Week NPI Patient8.40 units on a scaleStandard Deviation 13.27
RivastigmineNeuropsychiatric Inventory (NPI)6 Week NPI Caregiver3.91 units on a scaleStandard Deviation 4.86
RivastigmineNeuropsychiatric Inventory (NPI)12 Week NPI Patient5.24 units on a scaleStandard Deviation 5.54
RivastigmineNeuropsychiatric Inventory (NPI)18 Week NPI Caregiver2.89 units on a scaleStandard Deviation 3.17
RivastigmineNeuropsychiatric Inventory (NPI)12 Week NPI Caregiver2.22 units on a scaleStandard Deviation 2.86
RivastigmineNeuropsychiatric Inventory (NPI)6 WeekNPI Patient8.63 units on a scaleStandard Deviation 11.73
RivastigmineNeuropsychiatric Inventory (NPI)18 Week NPI Patient7.26 units on a scaleStandard Deviation 7.36

Source: ClinicalTrials.gov · Data processed: Mar 23, 2026