Alzheimer’s Dementia: Overview of Evaluation and Care Alireza Atri, MD, PhD Associate Director, Clinical Programs, Geriatric Research Education & Clinical Center (GRECC) ENRM VA Bedford Medical Center Memory Disorders Unit & MA Alzheimer’s Disease Research Center Dept. of Neurology, Massachusetts General Hospital Harvard Medical School 1 Disclosure/conflict of interest Alireza Atri – past 3 years I am not/have not been part of any speakers bureau Support: NIH, Veterans Administration (VA) Institutional Research Grant: Forest Research Institute Scientific Advisory Board, Consultation and/or lectures/CME programs: Alzheimer’s Association (MA/NH), Daiichi-Sankyo, Forest Research Institute, Harvard Medical School Continuing Education (HMS CE), Lundbeck, Merck, Merz, Veterans Health Administration Office of Research (ORD RRD) 2 Human beings are members of a whole, In creation of one essence and soul, If one member is afflicted with pain Other members uneasy will remain. If you have no sympathy for human pain, The name of human you cannot retain. Saadi Shirazi (Persian/Iranian Poet, 1184–1283) 3 Overview Early detection of cognitive impairment and dementia is crucial: it allows for early education, and care and planning to minimize harm, establish practical and healthy habits, and to shore up existing functions before they are lost Good evidence level for benefits of AD treatments (pharmacological and non-pharmacological) Must balance risks and benefits on an individual patientcaregiver dyad basis Best standard of care treatments combine behavioral and pharmacological treatments, education & care of the patient and caregivers 4 reduce long-term clinical decline and delay time to full-time disability reduce caregiver burden Provide cumulative and meaningful benefits No man is an island, entire of itself... Any man’s death diminishes me, because I am involved in mankind; and therefore never send to know for whom the bell tolls; it tolls for thee John Donne 5 Global impact of AD Costs of caring for individuals with Alzheimer’s disease: 6 Worldwide: $604 billion in 2010 (>1% of world GDP) U.S: 190-220 billion (direct costs) AD is the sixth leading cause of mortality in the U.S. and the only one that is increasing … 7 Projected numbers of people with AD in the U.S. 8 Hypothetical model of AD pathophysiological cascade AD risk factors and the amyloid cascade hypothesis Age genetics Risk factors: • Aging and gender (F>M) • Family history • Severe head injury • Altered cerebral perfusion • ApoE 4 (CLU, CR1, PICALM, SORL1, TOMM 40) genotype • Environmental stressors • Gene mutations • Cerebral amyloidosis 9 Amyloid-β accumulation Amyloid deposition AGE 30 40 50 60 70 80 90 Cardiovascular risk factors Other age-related brain diseases Synaptic dysfunction; glial activation; tangle formation; neuronal death Cognitive decline Brain and cognitive reserve ? Environmental factors Microglial activation Neurofibrillary tangles Neuronal loss/ neurochemical changes DEMENTIA Concept of co-occurrence of Vascular Disease & AD pathology in Dementia VaD 10 AD Spectrum of CVD Stroke MRI Infarction White Matter Hyperintensities Brain Atrophy 11 AD Spectrum occurs on a continuum of severity from No Mild Marked impairment Onset Clinical diagnosis of MCI* of AD % of end-stage AD 100 80 PRECLINICAL phase 60 MCI phase DEMENTIA phase 40 20 Degree of cognitive impairment 0 40 50 60 70 Estimated start of amyloid deposition 12 *MCI = mild cognitive impairment 80 Age (years) The Fallacies & Facts regarding screening - Why & How To Screen? • Fallacy 1: “I can tell if there’s something wrong with them, and besides, if I start asking them these kinds of questions they’d be offended” The basic dementia workup • • 13 Fact 1a: “Physician heal thyself” – we must disabuse ourselves of such false and damaging notions Fact 1b: normalize and explain rationale and benefits of screening you’d be delivering good care that is appreciated The Fallacies & Facts regarding screening - Why & How To Screen? • • 14 Fallacy 2a: “I can simply rely on the information provided by my patients to make my decisions” The basic dementia workup Fallacy 2b: “Screening doesn’t make a difference – dementia declares itself, and catching it early makes no difference to my patient’s health or my practice” The Fallacies & Facts regarding screening - Why & How To Screen? • Consider two typical cases: • Case 1: Mrs. Smith 78 y.o. woman with difficult to control HTN, mild depression, anxiety and insomnia is admitted to the hospital for pneumonia, is started on antibiotics along with her outpatient anti-HTN medication regimen blood pressure falls from 169/88 to 76/43 • Case 2: Mr. Jones 74 y.o. recent widower with IDDM x20 yrs, HTN, CAD, s/p MI and h/o CHF, all previously wellcontrolled but now with escalating # of admissions in the last 2 years due to “out of control diabetes”, “hypoglycemia”, and “exacerbations of CHF” 15 The basic dementia workup The Fallacies & Facts regarding screening - Why & How To Screen? 16 • Fallacy 2a: “I candementia simply rely on theworkThe basic information provided by my patients to make up decisions” • Fact 2a: Need to “Trust but verify” – need objective and reliable corroboration to form an informed impression and plan of care The Fallacies & Facts regarding screening - Why & How To Screen? • Fallacy 2b: “Screening doesn’t make a difference – dementia declares itself, and catching it early makes no difference to my patient’s health or my practice” The basic dementia workup • 17 Fact 2b: Unrecognized cognitive impairments affect patient health and safety, and clinicians often contribute to poor patient medical and safety outcomes by violating “primumum non-nocere” when we form wrong impressions and plans and ask too much of patients who have unrecognized diminished capacity Why & How To Screen? The basic dementia work1. Normalize and explain up 2. Reliable information 3. Sensitive measures of all domains 1. Cognition (e.g. MoCA) 2. Function (ADL measure; e.g. FAQ) 3. Behavior & Neuropsychiatric symptoms (e.g. Neuropsychiatric Inventory) 18 Suggestions for Dementia Screening and Tracking Instruments 1. 2. 3. 4. 5. 19 Global Screen: 1. AD8 Function - Activities of Daily Living: 1. FAQ (Functional Assessment Questionnaire scale) 2. IADLs 3. PSMS Neuropsychiatric/Behavioral (aka. Non-cognitive Behavioral Symptoms, NCBS): 1. NPI (Neuropsychiatric Inventory) Cognitive Screen: 1. MOCA (Montreal Cognitive Assessment) (screen MCI/mild dementia) 2. Blessed Dementia Scale Information-Memory-Concentration (BDS-IMC scale, aka. “Right side” of the Blessed) (Tracking) 3. SLUMS (St. Lois Univ. Mental Status exam) 4. Addenbrooke’s Cognitive Exam Revised (ACE-R) Staging, Severity, “Global”: 1. CDR (Clinical Dementia Rating Scale) 2. FAST 3. CIBIS-PLUS 4. GDS 20 21 ORIENTATION 10 ( Spatial: 5 ( ) ) What is the: (year) (season) (date) (day) (month) Temporal: 5 ( MMSE ) Where are we: (state) (county) (town) (facility) (floor) REGISTRATION 3( ) Name three objects and have person repeat them back. Give one point for each correct answer on the first trial. 1. _______ 2. _______ 3. _______ (e.g. Apple, Penny, Table) Then repeat them (up to 6x) until all three are learned. [Number of trials ____ ] ATTENTION AND CALCULATION 5 ( ) Serial 7's. Count backwards from 100 by serial 7's. One point for each correct answer. Stop after 5 answers. [ 93 86 79 72 65 ] Alternatively spell "world" backwards. [ D - L - R - O - W ] RECALL 3 ( LANGUAGE 9( ) Ask for the names of the three objects learned above. Give one point for each correct answer. ) Name: a pen (1 point) and a watch (1 point) Repeat the following: "No ifs, ands, or buts" (1 point) Follow a three-stage command: "Take this paper in your [non-dominant] hand, fold it in half and put it on the floor". (3 points) [1 point for each part correctly performed] Read to self and then do: CLOSE YOUR EYES (1 point) Write a sentence [subject, verb and makes sense] (1 point) Copy design [ 5 sided geometric figure; 2 points must intersect] (1 point) Score: 22 /30 Cognitive Screening in Primary Care Why is MMSE not sensitive to early cognitive changes or dementia in many populations? not enough memory load only 3 items highly concrete and high frequency objects/words delay period not long enough 23 Suggestions for Dementia Screening Instruments 1. Global screening instrument: 1. 2. Function - Activities of Daily Living: 1. 3. NPI (Neuropsychiatric Inventory) Cognitive screen: 1. 2. 3. 24 FAQ (Functional Assessment Scale) Neuropsychiatric/Behavioral: 1. 4. AD8 MOCA (Montreal Cognitive Assessment) Blessed Dementia Scale Information-Memory-Concentration (BDS-IMC scale, aka. “Right side” of the Blessed) Addenbrooke’s Cognitive Exam Revised (ACE-R) MOCA Scored out of 30 Cut off for Impairment: <26* (100% specificity) *Add 1 point if ≤ 12 yrs education 25 Neuropsychological Testing When initial evaluation is borderline or in pts with unusual clinical profiles To establish a baseline and track longitudinal change To clarify patterns of cognitive impairment To consider percentile performance in each test and domain 26 Especially useful in pts with superior premorbid ability Neuropsychological Testing To help distinguish between depression/mood disorders & dementia To help determine competency To assist in the evaluation and counseling of dementia in the early stages: 27 Determination of disability Determine specific weaknesses Determine specific strengths Recommend strategies for safety and more efficient functioning Minimum of TWO cognitive OR behavioral domains impaired a. Memory dysfunction: anterograde; deficit in acquisition, storage or retrieval of new information 28 b. Frontal systems dysfunction: executive dysfunction or poor judgment & reasoning 29 c. Visuospatial dysfunction 30 d. Language (communication) dysfunction 31 e. Personality changes & Behavioral dysfunction 32 33 AD DEMENTIA CLASSIFICATION 1. Probable AD dementia (clinical classification) 2. Possible AD dementia (clinical classification) 3. Probable or Possible AD dementia with evidence of the AD pathophysiological process (research classification) 34 AD DEMENTIA CLASSIFICATION 1. Probable AD (PrAD) dementia with increased level of certainty i. PrAD with documented decline ii. PrAD in carrier of causative AD genetic mutation (APP, PSEN1, PSEN2) (but NOT ApoEe4) 35 36 37 38 • strokes that are temporally related to onset or worsening of cognitive impairment • multiple or extensive infarcts or severe white matter hyperintensity burden • core features of Diffuse Lewy Body Dementia (DLB) other than dementia itself • prominent features of Primary Progressive Aphasia(PPA) • evidence of another concurrent, active neurological disease, or non-neurological medical comorbidity or use of medication that could have a substantial effect on cognition 39 AD DEMENTIA CLASSIFICATION 2. Possible AD dementia 1. Atypical course (sudden onset or insufficient historical detail or objective cognitive documentation of progressive decline) 2. Mixed Presentation (VaID, DLB features, medications or other illness) 40 Basic Dementia Workup - 41 Laboratory tests: CBC w/ diff Chem 20 w/ glucose & Liver function tests Vitamin B12 TSH – thyroid function ESR and hsCRP – screen for occult general (systemic) infectious, inflammatory or neoplastic (cancer) process Homocysteine Lipid panel – cholesterol Atrophy of AD Brain Atrophy of hippocampus & temporal lobe > frontal & parietal lobe >> occipital lobe & motor cortex Pattern is characteristic, but not specific for AD 42 Dynamic Biomarkers of the Alzheimer’s Spectrum Pathological Cascade Brain Amyloid-beta Biomarkers: CSF A-beta42 Amyloid PET neuroimaging Jack CR et al. Lancet Neurol. 2010 43 Neurodegeneration Biomarkers: FDG PET (synaptic) CSF Tau (neuronal injury) Structural MRI (volume) Structural Imaging: MRI vs CT MRI>>CT (if no contraindication) and can significantly change your management MRI is better at detecting: Atrophy (e.g. hippocampal atrophy, ventricular enlargement “Normal” 44 “Moderate Atrophy” Scheltens, P. Imaging in AD. Dialogues in Clinical Neuroscience (2009) Structural Imaging: MRI vs CT MRI>>CT (if no contraindication) and can significantly change your management MRI is better at detecting: Atrophy (e.g. hippocampal atrophy, ventricular enlargement Cerebrovascular disease burden: Leukoaraiosis (white matter microangiopathic changes) and micro/lacunar infarcts From: O’Brien, JT, et al. 2003. Vascular Cognitive Impairment. Lancet Neurology. Feb (2):89-98; and Scheltens, P. Imaging in AD. Dialogues in Clinical Neuroscience 45 (2009) Structural Imaging: MRI vs CT MRI>>CT (if no contraindication) and can significantly change your management MRI is better at detecting: 46 Atrophy (e.g. hippocampal atrophy, ventricular enlargement Cerebrovascular disease burden: Leukoaraiosis (white matter microangiopathic changes) and micro/lacunar infarcts Microhemorrhages (non-acute) Atri et al. Prevalence and effects of lobar microhemorrhages in early-stage dementia. Neurodeg Dis 2005 Structural Imaging: MRI vs CT MRI>>CT (if no contraindication) and can significantly change your management MRI is better at detecting: 47 Atrophy (e.g. hippocampal atrophy, ventricular enlargement Cerebrovascular disease burden: Leukoaraiosis (white matter microangiopathic changes) and micro/lacunar infarcts Microhemorrhages (non-acute) Hydrocephalus Selective Use of Additional Tests Under Special Circumstances 48 CSF: Abeta/tau/phospho-tau profile Cerebral Metabolism or blood flow: FDG-PET >> SPECT Amyloid-PET Other tests for rare dementing conditions/mimics CSF Biomarkers for AD (and other neurodegenerative dementias); Abeta-42 and Tau Levels 49 Low Abeta-42 High Tau High Phospho-Tau Low ATI (A-beta to Tau+Phos-Tau index; <1.0) Sensitivity (88-95%) > specificity (83-87%) Predictive potential: longitudinal studies “Conversion” from “normal control” (Latent AD) to “MCI” (Prodromal AD) (Tau/A-beta ratio > 2.4) “Conversion” from MCI to AD (sens. 95%, spec. 8387%) Hansson et al. Lancet Neuro, 2006; Li et al. Neurology, 2007 FDG and PIB PET in early AD (82 yo MMSE 27) 50 K. Johnson MGH MULTIFACTORIAL Treatment of Alzheimer’s disease 51 Symptomatic treatment of AD – current status FDA-approved indication/labels for AD: Disease specific Cholinesterase inhibitors (ChEIs): donepezil*, rivastigmine, galantamine* NMDA antagonist: memantine * Generic forms available in the U.S. No FDA-Approval indication/label for AD: Non-specific Other pharmacological agents taken 52 Antidepressants Antipsychotics** (**risperidone approved by EMA for short-term treatment of refractory severe agitation & psychosis in AD dementia) Vitamin E, C Gingko biloba, cerebrovascular agents, antioxidants, statins, antiinflammatories, vitamins (B/C), antiepileptic agents, fish oil/omega-3 fatty acids, hormones, “nootropics” None have proven efficacy in AD dementia RCTs Summary of Level I Evidence from pivotal studies in AD Dementia Treatment Dosing Level I Evidence Side Effects Other Donepezil 5mg or 10mg or 23mg Multiple R DB PC trials 3-12 months. Mild, mod, severe Low incidence GI esp diarrhea and nausea ODT and Generic available for 5 and 10 mg doses Rivastigmine Oral: 3mg-6mg BID Multiple R DB PC Patch: 9.5-13.3 trials 6 months. mg/24h Mild to moderate Low-moderate GI incl anorexia, diarrhea & vomiting w/ oral; rash w/ TP Start doses not effective. 13.3 mg/24h patch better when pt declines Galantamine 8mg or 12mg BID Multiple R DB PC trials 6 months. Mild to moderate Low incidence GI esp diarrhea and nausea ER available for QD. Start dose not effective. Generic available Memantine 10mg BID 28 mg XR QD Multiple R DB PC Few AE’s; occ. mild 4-step titration to trials 6 months. transient confusion max dose, one Moderate to severe ~weeks3-5 week apart Combination Tx (Memantine added to stable donepezil) 10 mg BID or 28 mg XR QD memantine added to chronic ChEI therapy Two R DB PC Few AE’s; mild moderate to severe transient confusion trials ~weeks3-5 RTC data in mild AD lacking; observational studies support long-term benefits Vitamin E 1000 IU BID Two R DB PC trials Few AE’s moderate to severe trial More robust effects on slowing functional than on cognitive decline; 53 AChEI & Memantine Combination Therapy RATIONALE & BIOLOGICAL EFFECT 54 Memantine + donepezil combination therapy – potential synergistic mode of action D M D AChr M D NBM M Cholinergic neuron M D M D Hippocampus Cortex Glutamate Acetylcholine AChE Acetylcholinesterase Acetylcholine receptor NMDA receptor 55 D M Donepezil Memantine Glutamatergic neuron Memantine + donepezil synergistically affect ACh release in experimental rat model Percentage increase in ACh (SE) Hippocampal levels of acetylcholine in rats 800 600 400 200 0 Donepezil Sum Memantine Memantine + 0.5 mg/kg (n=11) 5 mg/kg (n=11) donepezil (n=11) Experiment conducted in the presence of 5 M neostigmine *p<0.05 (t-test; t=2.6) versus sum Sum=sum of increases elicited by each drug individually 56 Ihalainen et al. Neuropharmacology 2011; 61 (5-6): 891–899 Memantine + donepezil has a potential synergistic effect Memantine and donepezil, applied individually, each produce an increase in extracellular ACh in the hippocampus of anaesthetised rats – driven by different mechanisms Combined treatment with both drugs produces an enhancement in ACh levels – greater than the sum of the parts The action of memantine and donepezil together suggests a potential synergistic interaction on synaptic ACh release 57 Ihalainen et al. Neuropharmacology 2011; 61 (5-6): 891–899; Giovannini et al. J Neurosci 1994; 14: 1358–1365 Combination Therapy (ChEI + memantine) in AD – Phase III, EFFICACY placebo-controlled 24-week studies Study 58 Type of memantine therapy (20 mg/day) Duration (weeks) MMSE inclusio n criteria Number of patients MMSE <20 + receiving donepezil Tariot et al., 2004 (MD-02) 10 mg BID Added to stable donepezil therapy (5–10 mg/day for ≥3 months) 24 5–14, inclusive 403 (202 memantine + donepezil; 201 placebo + donepezil) Grossberg et al. 2013 (MD-50) 28 mg XR to any approved ChEI therapy (5 or 10 mg/day donepezil: 6, 9 or 12 mg/day rivastigmine; 16 or 24 mg/day galantamine for ≥3 months) 24 3-14, inclusive 661 (333 memantine XR + ChEI; 328 placebo + ChEI) Porsteinsson et al., 2008 (MD-12) Added to any approved ChEI therapy (5 or 10 mg/day donepezil: 6, 9 or 12 mg/day rivastigmine; 16 or 24 mg/day galantamine for ≥3 months) 24 10–22, inclusive 202 (105 memantine + donepezil; 97 donepezil monotherapy) Tariot PN, et al. JAMA 2004; Grossberg et al. CNS drugs 2013; Porsteinsson AP, et al. Curr Alzheimer Res 2008 Combination therapy benefits cognition Severe Impairment Battery (SIB) Improvement 2 0 Worsening Mean change from baseline 4 -2 Combination therapy (DPZL+MEM) Donepezil monotherapy -4 Baseline 4 8 12 18 Study week 59 *p<0.05; **p<0.01; ***p<0.001 versus donepezil monotherapy 24 Endpoint (LOCF) Tariot et al. JAMA 2004; 291 (3): 317–324 Post hoc analyses of cognitive effects Benefits for memantine combination therapy (versus donepezil monotherapy) on: Cognitive subscales (SIB): Post hoc-derived functional communication and language subscales: 60 Memory (p<0.05) Language (p<0.05) Praxis (p<0.05) Naming capabilities (p<0.01) Functional communication (according to caregivers) (p<0.01) Schmitt et al. Alzheimer Dis Assoc Disord 2006; 20 (4): 255–262; Saxton et al. 60th Annual Meeting of the American Academy of Neurology, 2008; Chicago, IL, USA Combination therapy benefits function Activities of Daily Living inventory (ADCS-ADL19) 0 -1 Worsening Mean change from baseline Improvement 1 -2 -3 Combination therapy (DPZL+MEM) Donepezil monotherapy -4 Baseline 4 8 12 Study week 61 *p<0.05 versus donepezil monotherapy 18 24 Endpoint (LOCF) Tariot et al. JAMA 2004; 291 (3): 317–324 Post hoc analyses of functional effects Benefits for memantine combination therapy (versus donepezil monotherapy) on: Functional single items (ADCS-ADL19): Functional subscales (ADCS-ADL19): 62 Grooming (p<0.01) Watching TV (p<0.01) Finding belongings (p<0.01) Connectedness/autonomy (p<0.05) Higher level functions (p<0.05) Statistically significant less decline in the total ADCS-ADL19 score Feldman et al. Alzheimer Dis Assoc Disord 2006; 20 (4): 263–268 Combination therapy benefits behavior Neuropsychiatric Inventory (NPI) 2 0 -2 Combination therapy (DPZL+MEM) -4 Donepezil monotherapy 0 12 24 Study week 63 Worsening Mean change from baseline Improvement 4 **p<0.01; ***p<0.001 versus donepezil monotherapy Endpoint (LOCF) Cummings et al. Neurology 2006; 67 (1): 57–63 Post hoc analyses of behavioral effects Benefits for memantine combination therapy (versus donepezil monotherapy) Behavioral domains (NPI): Significantly less caregiver distress, due to the patient’s: 64 Agitation (p<0.01) Irritability (p<0.01) Appetite/eating changes (p<0.05) Most other domains showed non-significant improvement This behavioral response was stable over time Agitation/aggression Night-time behaviour Eating changes Prevention of emergence of agitation, irritability, and night-time behavior (all p<0.05) Cummings et al. Neurology 2006; 67 (1): 57–63 Most frequent adverse events* (%) Total patients with AEs Discontinuations due to AEs Combination (n=202) Donepezil monotherapy (n=201) 78 7.4 72 12.4 Agitation 9.4 11.9 Confusion 7.9 2.0 Fall 7.4ameliorated 7.0in Agitation possibly with Confusion was more common Fewer receiving combination Influenza-like symptoms combination patients 7.4 patients 6.5 therapy, therapy receiving combination therapy discontinued due to8.0 AEs Dizziness but 6.9 this did not lead to more Headache 6.4 2.5 discontinuations Urinary tract infection 5.9 5.0 Urinary incontinence 5.4 3.0 Gastrointestinal AEs possibly8.0 Accidental injury 5.0 ameliorated by combination therapy Upper respiratory tract infection 5.0 6.5 Peripheral edema 5.0 4.0 Diarrhea 4.5 8.5 Fecal incontinence 2.0 5.0 *Occurring in ≥5% of patients in either treatment group 65 Tariot et al. JAMA 2004; 291 (3): 317–324 Combination Therapy (ChEI + memantine) in AD – Phase III, EFFICACY placebo-controlled 24-week studies Study 66 Type of memantine therapy (20 mg/day) Duration (weeks) MMSE inclusio n criteria Number of patients MMSE <20 + receiving donepezil Tariot et al., 2004 (MD-02) 10 mg BID Added to stable donepezil therapy (5–10 mg/day for ≥3 months) 24 5–14, inclusive 403 (202 memantine + donepezil; 201 placebo + donepezil) Grossberg et al. 2013 (MD-50) 28 mg XR to any approved ChEI therapy (5 or 10 mg/day donepezil: 6, 9 or 12 mg/day rivastigmine; 16 or 24 mg/day galantamine for ≥3 months) 24 3-14, inclusive 661 (333 memantine XR + ChEI; 328 placebo + ChEI) Porsteinsson et al., 2008 (MD-12) Added to any approved ChEI therapy (5 or 10 mg/day donepezil: 6, 9 or 12 mg/day rivastigmine; 16 or 24 mg/day galantamine for ≥3 months) 24 10–22, inclusive 202 (105 memantine + donepezil; 97 donepezil monotherapy) Tariot PN, et al. JAMA 2004; Grossberg et al. CNS drugs 2013; Porsteinsson AP, et al. Curr Alzheimer Res 2008 Evidence Level Combination (ChEI with add-on memantine) Efficacy RCTs 67 Measuring Magnitude of Clinical Effects (clinical significance) - Effect Sizes • Effect size is a name given to a family of indices that measure the magnitude of a treatment effect • Cohen defined the effect size d as: = (difference between means)/(standard deviation) Suggested as a guide that: 16 yr. old 15 yr. old Small d = 0.2 68 18 yr. old 15 yr. old Medium d = 0.5 Source: Cohen J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale, NJ: Lawrence Earlbaum Associates. 18 yr. old 13 yr. old Large d = 0.8 Combination therapy (memantine + donepezil) is superior to placebo added to donepezil monotherapy in all three key domains of meta-analysis (MMSE < 20) MMSE <20 (5-19) 69 Atri & Molinuevo, et al. Alzheimer Res Ther. 2013 Jan 21;5(1):6 Combination Treatment has good safety profile (meta-analysis; MMSE<20) 70 Atri & Molinuevo, et al. Alzheimer Res Ther. 2013 Jan 21;5(1):6 * 71 *indeterminate (underpowered) DOMINO 52-week study: donepezil and memantine in moderate to severe AD 52-week, multicentre, doubleblind, placebo-controlled, clinical trial in outpatients: With probable or possible AD (SMMSE score 5–13) Stable on 10 mg/day donepezil Whose clinician was considering a change in drug treatment Participants were randomly assigned to one of: Continue donepezil Discontinue donepezil Continue donepezil and start memantine Discontinue donepezil and start memantine Randomised N=295 Continue donepezil Continue donepezil Discontinue donepezil for placebo Discontinue donepezil for placebo Start placebo n=73 Start memantine n=73 Start placebo n=73 Start memantine n=76 Receiving drug at end of study n=34 (47%) Receiving drug at end of study n=38 (52%) Receiving drug at end of study n=20 (27%) Receiving drug at end of study n=27 (36%) SMMSE=Standardised Mini Mental State Examination 74 Howard et al. N Engl J Med 2012; 366: 893–903 “Whoa!!! That CAN’T be right!” • A priori specified initial target: Ntarget1=800 • Revised target: Ntarget2=430 • Enrollment achieved: Nactual=295 (37% of initial target; 68% of revised target) • Had high (72%) and disproportionate withdrawal rate over one year Atri et al. Neurodeg Dis 2012; 10 (1–4): 170–174 Howard et al. N Engl J Med 2012; 366: 893–903 75 Neurology Today; April 19, 2012: 12-13 DOMINO cumulative probability of study drug withdrawal: 28% of the adjusted target (n=430) completed 52 weeks, spread over 4 treatment arms Memantine + donepezil 0.7 Placebo + donepezil 0.6 Memantine + discontinue donepezil Placebo + discontinue donepezil 0.5 n=27 0.4 n=34 n=72 0.3 n=38 n=74 0.2 n=73 n=72 0.1 0.0 0 76 n=20 42 WORSE DROP-OUT Probability of withdrawal from study drug 0.8 Continue donepezil Start memantine vs. discontinue vs. startdonepezil placebo Hazard Hazard ratio: ratio: 0.51 0.66 95% CI: 0.36 0.72 95% CI:to 0.47 to 0.93 p<0.001 p=0.02 364 210 126 Days since randomisation Kaplan–Meier actuarial plot of the cumulative probability of withdrawal from the assigned study drug Howard et al. N Engl J Med 2012; 366: 893–903 8 7 38 * 6 5 4 3 2 1 0 36 34 * 32 30 28 26 0 6 18 30 52 Visit week 78 BADLS (±SE) 40 SMMSE (±SE) 9 Improvement 42 Improvement 10 *indeterminate (underpowered) by week 52 0 6 18 30 Visit week Placebo + discontinue donepezil Placebo + donepezil Memantine + discontinue donepezil Memantine + donepezil Multilevel modelling repeated-measures regression; SMMSE=Standardised Mini Mental State Examination; BADLS=Bristol Activities of Daily Living Scale 52 Howard et al. N Engl J Med 2012; 366: 893–903 DOMINO-AD 52-week study: summary Supports and extends the preponderance of clinical evidence and clinical wisdom that these anti-AD medications produce real benefits in slowing clinical decline, that: Donepezil and memantine monotherapy are both superior to placebo for at least one year Stopping treatment was harmful Memantine resulted in much less behavioural worsening of NPI scores (p=0.002), with a benefit that was equivalent to 83% of the 12-month deterioration compared to placebo Graphical data suggest that combination therapy trajectory is superior to monotherapy in cognition, function and behavior for initial 30 weeks Howard et al. N Engl J Med 2012; 366: 893–903 Neurology Today; April 19, 2012: 12-13 79 Clinical effectiveness studies – Rationale for longitudinal naturalistic observational clinical cohort studies in AD Inclusion of ‘real’ patients Significant comorbidities Concurrent medications Imperfect treatment adherence Strengths: High validity; higher power (larger sample sizes and durations), collect data over several stages of AD; better capacity to assess questions of practical importance; ethically & practically favorable Limitations: 80 Drug therapy is often not assigned randomly, Selection factors associated with long-term drug exposure cannot be ruled out as alternative explanations for findings Evidence Level Combination (ChEI with add-on memantine) Long-Term Observational Controlled Effectiveness Studies 81 Combination therapy slows long-term decline in cognition (BDS) 10 Worsening Predicted mean BDS score (errors) 5 15 20 Memantine combination therapy 25 ChEI monotherapy No medication 30 0 1 # of mistakes: 0–37 errors 0–3 errors (normal, MCI or very mild impairment) 4–10 errors (mild impairment/dementia) 11–16 errors (moderate impairment/dementia) >16 errors (severe impairment/dementia) 82 2 Years 3 4 *p<0.05, **p<0.01, ***p<0.001 versus no medication; #p<0.01, ###p<0.001 versus ChEI monotherapy Atri et al. Alzheimer Dis Assoc Disord 2008; 22: 209–221 Predictive cognitive scores and effect sizes Years Cohen’s dBDS 1 Years 3 4 ChEI vs NO-RX 0.47*** 0.39** 0.32** 0.28* COMBO vs NO-RX 0.56*** 0.73*** 0.76*** 0.77*** COMBO vs ChEI 0.10 0.34** 0.44*** 0.49*** *p<0.05, **p<0.01, ***p<0.001 4 0 Model predicted mean errors (± 95% CI) 2 3 Worsening 1 2 10 20 30 COMBO ChEI group No treatment Cohen defined effect sizes as: “small, d = 0.2” “medium, d = 0.5” “large, d = 0.8” 83 Atri et al. Alzheimer Dis Assoc Disord 2008; 22: 209–221 Study Aim: To compare long-term clinical trajectory of cognition and function between 3 treatment groups of AD patients (No-Tx=BSC, ChEI only, COMBO) Atri et al., 2008 • Are there differences long term? • Are there benefits or detriments long term? 382 patients at Mass General Memory Disorders Unit (1990–2006) No treatment n=144 ChEI alone n=122 Memantine + ChEI (COMBO) n=116 Average enrolment year 1993 2000 2002 Average time in study 2 years 2.2 years 3.3 years Cognition: Blessed Dementia Scale (BDS) Outcome measures Function: Weintraub Activities of Daily Living (ADL) Mixed effects and GEE modeling analysis of 4-year trajectory of progression BSC=best standard care 84 Atri et al. Alzheimer Dis Assoc Disord 2008; 22: 209–221 Combination therapy slows long-term decline in function (ADL) 20 40 Worsening Predicted mean level of dependence (%) 30 50 60 Memantine combination therapy 70 ChEI monotherapy No medication 80 0 1 2 3 4 Years Scored from 0% (normal) to 100% dependency 87 *p<0.05 versus no medication; ***p<0.001 versus no medication; ###p<0.001 versus ChEI monotherapy Atri et al. Alzheimer Dis Assoc Disord 2008; 22: 209–221 Predictive functional dependence and effect sizes Years Cohen’s dADL 1 2 3 4 0.08 0.02 -0.03 -0.06 COMBO vs No-treatment 0.32* 0.48*** 0.60*** 0.67*** COMBO vs ChEI 0.23 0.46*** 0.62*** 0.73*** 3 4 20 Model predicted mean % dependent (± 95% CI) 1 2 30 Worsening ChEI vs Notreatment Years 40 50 60 70 80 COMBO ChEI group No treatment Significantly different from 0; *p<0.05; ***p<0.001 Cohen defined effect sizes as: “small, d = 0.2” “medium, d = 0.5” “large, d = 0.8” 88 Atri et al. Alzheimer Dis Assoc Disord 2008; 22: 209–221 Long-term study of time to institutionalisation – methods Lopez et al., 2009 Objectives To examine the effect of combination therapy on time to nursing home admission and time to death Methods A cohort of 429 patients with: Subjects received: 89 Probable AD (mean MMSE=18.7, SD=5.1) 1+ years of treatment Analysis 1 No dementia treatment: n=416 ChEI alone: n=387 ChEI + memantine: n=140 Analysis 2 ChEI alone: n=387 ChEI + memantine: n=140 Annual physical/neuropsychological assessments in the clinic Biannual telephone interviews Survival analysis was conducted with multivariable Cox proportional hazard models Lopez et al. J Neurol Neurosurg Psychiatry 2009; 80 (6): 600–607 Combination therapy delays time to nursing home placement in AD; does not prolong life 1.00 Memantine + ChEI 0.75 ChEI monotherapy No dementia medication Estimated proportion not admitted to nursing home Estimated proportion not admitted to nursing home Lopez et al., 2009 0.50 0.25 0.00 1.00 0.75 0.50 0.25 0.00 0.0 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 0 1 2 3 4 5 6 7 Follow-up time (years) Follow-up time (years) • Patients taking combination therapy were 3–7 times less likely to be placed in a nursing home than patients receiving ChEI monotherapy • No association was found with medication use and time to death 90 Memantine combination therapy ChEI monotherapy Analysis 1 No dementia treatment: n=416 ChEI alone: n=387 ChEI + memantine: n=140 Analysis 2 ChEI alone: n=387 ChEI + memantine: n=140 Lopez et al. J Neurol Neurosurg Psychiatry 2009; 80 (6): 600–607 Vitamin E 91 92 93 94 Dysken JAMA 2014 Antipsychotic use in AD “YOUR REFLEXES SEEM FINE MR. HART” 97 Risperidone Efficacy: Meta-Analysis (BEHAVE-AD) Target symptom Mean difference from placebo P-value 95% CI Risperidone 1 mg Psychosis -0.79 P=0.03 -1.31, -0.27 Risperidone 1 mg Aggression -0.84 P=0.0002 -1.28, -0.40 Risperidone 2 mg Aggression -1.50 P<0.0001 -2.05, -0.95 Ballard & Howard. Nat Rev Neurosci . 2006; 7(6):492–500. 98 Adverse Events with Risperidone Adverse Events Dose/Day Risperidone Placebo Odds Ratio 95% CI P-value Extrapyramidal symptoms 1 mg 32/500 20/571 1.78 1.00, 3.17 P<0.05 2 mg 35/165 12/163 3.39 1.69, 6.80 P=0.0006 Gait 1 mg 21/402 1/408 7.47 2.21, 25.28 P=0.001 1 mg 138/665 72/685 2.36 1.71, 3.24 P<0.00001 2 mg 46 /165 13/163 2.36 2.30, 8.64 P<0.00001 Respiratory tract infection 1 mg 15/149 6/163 2.93 1.11, 7.76 P=0.03 Fever 2 mg 24/165 12/163 2.14 1.03, 4.44 P=0.04 0.5 mg 24/149 9/163 3.29 1.47, 7.32 P=0.004 1 mg 32/315 15/333 2.43 1.29, 4.59 P=0.006 2 mg 30/165 9/163 3.80 1.74, 8.29 P=0.0008 Somnolence Peripheral edema Ballard & Howard. Nat Rev Neurosci. 2006;7(6):492–500. 99 Meta-Analysis: Negative Impact of Antipsychotic Treatment on Cognition (MMSE) WMD: 0.73 [0.38, 1.09] 100 Schneider et al. Am J Geriatr Psychiatry. 2006;14(3): 191–210. Meta-analysis: Risperidone Increases Risk of Cerebrovascular Events in AD Number of cerebrovascular adverse events before end of treatment at 8–13 weeks 101 Ballard et al. Cochrane Database of Systematic Reviews. 2006, Issue 1. Art. No.: CD003476. DOI: 10.1002/14651858.CD003476.pub2. Mortality and Antipsychotics in People with Dementia Trial Information Summary of the Results FDA Meta-analysis of 17 placebocontrolled trials of atypical neuroleptics in AD Significant 1.7-fold increase in mortality with neuroleptics Schneider et al. JAMA 2005 Meta-analysis of 15 placebocontrolled trials of atypical neuroleptics in AD Significant 1.54-fold increased mortality risk, with absolute increase of 1% Wang et al. NEJM 2005: mortality risk even higher with typical antipsychotics FDA Alert [6/16/2008]; Schneider et al. JAMA. 2005;294(15):1934–1943; Wang et al. N Engl J Med. 2005;353(22):2335–2341. 102 DART-AD differential survival: antipsychotics are associated with increased mortality risk 80 Relative risk= 1.8 Log rank p=0.02 70 Survival rate (%) 60 50 40 30 20 10 0 24 36 42 Number of months 103 Survival rate on placebo 71% 59% 53% Survival rate on a antipsychotic 46% 30% 26% Ballard et al. Lancet Neurol 2009; 8 (2): 151–157 Antipsychotic treatment Over short-term treatment periods atypical antipsychotics, particularly risperidone, shown to have modest efficacy (effect size, d~0.2) Modest efficacy has to be balanced against potential risks/detrimental effects in estimating individualized risk-benefit calculus With longer-term treatment, benefits are less clear-cut and the risks of severe adverse outcomes increase 104 105 Porsteinsson JAMA 2014 Practical Multifactorial Management of AD Necessary • Early detection, assessment & staging • Sustained targeting & tailoring to patient, caregivers & environment 107 Atri A. Am J Manag Care. 2011. Practical Multifactorial Management of AD Necessary • Early detection, assessment & staging • Sustained targeting & tailoring to patient, caregivers & environment 108 Atri A. Am J Manag Care. 2011. Non-Pharmacological Interventions • Psycho-education • Behavioral interventions • Fostering support networks • Monitoring health, safety & environment • Caring for Caregivers Non-pharmacological Interventions & Behavioral Approaches: • Psycho-education including: • AD dementia in general and effects on cognition, function and behaviors • Dementia care expectations • The “progression and regression model of aging and dementia” 109 Non-pharmacological Interventions & Behavioral Approaches: • Behavioral approaches – both general and targeted to the patientcaregiver dyad; these include: • Simplification of environment • Establishing routines • Providing a safe, calm, and consistent care environment • Utilizing strategies such as • interacting calmly • redirection to pleasurable activities and environment • reassurance • providing only necessary information in a manner that the patient can appreciate (i.e., in simple language and small chunks) and at the appropriate time • “benign therapeutic fibbing” • “Never saying No” to “allow the moment to pass” 110 Non-pharmacological Interventions & Behavioral Approaches: • Establishing and fostering support networks for the patient and caregivers • Identifying and monitoring health and safety risks for patient and others needs • stove • weapon • driving safety • falling prey to fraud • poor work or financial decision making • Advance planning for medical, legal and financial decision-making • Caring for Caregivers, including caregiver support and respite care 111 Practical Multifactorial Management of AD Necessary • Early detection, assessment & staging • Sustained targeting & tailoring to patient, caregivers & environment 112 Atri A. Am J Manag Care. 2011. Non-Pharmacological Interventions • Psycho-education • Behavioral interventions • Fostering support networks • Monitoring health, safety & environment • Caring for Caregivers Pharmacological • Eliminate inappropriate medications • Stage-appropriate combination therapy • Cautious and judicious use of other medications when necessary Elimination of redundant and inappropriate medications see Beers Criteria 113 Medications to avoid in older cognitively impaired individuals; adapted from Beers Criteria (AGS, 2012) Elimination of redundant and inappropriate medications see Beers Criteria 114 Medications to avoid in older cognitively impaired individuals; adapted from Beers Criteria (AGS, 2012) Treating Underlying Conditions that Exacerbate Dementia Symptoms • “Treating” underlying medical and psychiatric conditions that can exacerbate dementia symptoms, including: • dehydration • sleep problems/dysregulation • obstructive sleep apnea • pain • constipation • infections • electrolyte and metabolic derangements • anxiety • depression • psychosis • fear 115 When to Start? • “Early”: start AChEIs (cholinesterase-inhibitors)*, stablize • How early? • Need to have an informed discussion with patient 116 FDA label indication: 1. ChEI’s: Donepezil: mild, moderate and severe AD Galantamine & Rivastigmine: mild to moderate AD 2. Memantine (NMDA antagonist): moderate to severe AD RCTs of ChEIs in MCI: Failure to meet a priori specified primary end points; a big caveat for donepezil on other outcome measures Long-term ‘conversion’ trials ‘Symptomatic’ trials Primary outcomes Other outcomes Donepezil Rivastigmine Galantamine ADCS InDDEx (3-4 years) Gal 11 and Gal 18 (2 years) - - Negative Negative - - (3 years) 401 (24 weeks) 412 (52 weeks) Negative ADCS: Significant delay in conversion all groups for first 24 months (RR reduction of 58% at 12 months; 36% at 24 months), and throughout entire 36 month trial for APOE-e4 carriers 401 & 402: Positive outcomes on modified ADAS-cog 117 Salloway S, et al. Neurology. 2004;63:651–657 Petersen RC, et al. N Engl J Med. 2005;352:2379-88 Feldman HH, et al. Lancet Neurol. 2007;6:501-12; Winblad etal Neurology 2008;70:202402035 Doody R, et al.Neurology 2009;72:1555-61 118 119 When to Start? • Early: start AChEIs (cholinesterase-inhibitors)*, stablize * Unless severe/active/unstable GI bleed/PUD, arrhythmia/cardiac dz, seizure disorder, syncope add memantine** (or vice-versa) ** unless poor kidney function (GFR<30 then cut dose in ½) • Sustain multi-modal care and pharmacological Tx 120 FDA label indication: 1. ChEI’s: Donepezil: mild, moderate and severe AD Galantamine & Rivastigmine: mild to moderate AD 2. Memantine (NMDA antagonist): moderate to severe AD General Considerations Remove deleterious medications; slowly start and maintain combination treatment with ChEI and memantine-add-on; treat exacerbating and comorbid conditions; promote quality sleep, life and health 121 Reduce stress Reduce excessive EtOH intake Promote restorative sleep (diagnose and treat sleep apnea) Promote general physical, social & mental activity and health (and good diet and exercise) Treat anxiety and depression that is not responsive to behavioral interventions and combination treatment with ChEI+memantine Consider ECASA 81, Vitamin E* (*unless severe cardiovascular disease, on blood thinners, bleeding history/diathesis), Vitamin C, Vit B6/B12/folate RESIST antipsychotics, NO BENZODIAZIPINES Atri, A. Effective Pharmacological Management of Alzheimer’s Disease. Am J Managed Care, 2011. What else to screen for (cont.) Screening for: Home Safety Public Safety - DRIVING Medico-legal and legal issues Stress, depression and support services for caregiver - CARE FOR THE CAREGIVER 122 123 124 Current Trends in Effective Multifactorial Management of AD Necessary • Early detection, assessment & staging • Sustained targeting & tailoring to patient, caregivers & environment Non-Pharmacological Interventions • Psycho-education • Behavioral interventions • Fostering support networks • Monitoring health, safety & environment • Caring for Caregivers Caregivers are the glue • Sustained therapeutic alliance • Tailored to patient & support environment • Safety first • Pragmatic: simplification of care routine where possible, consider preferences 125 Atri A. Am J Manag Care. 2011. Pharmacological • Eliminate inappropriate medications • Stage-appropriate combination therapy • Cautious and judicious use of other medications when necessary When to Stop? • End/Terminal-Stage Dementia/AD: non-verbal, no meaningful interaction or personhood, nonambulatory • No indication for ANY medications (except for comfort) 126 Multiple ways to define treatment benefits Assessing benefits Mean changes in symptom domains Placebo Active Stabilisation Improvement + + Cognition Cognition 0 Behaviour 0 Behaviour ADLs - - Less than expected decline + 0 127 Inter-relationship between symptom domains ADLs Treatment expectations versus expected decline Global symptom severity Mild Successful treatment Untreated Severe Time 128 Geldmacher et al. J Nutr Health Aging 2006; 10: 417–429 Why Diagnose and Treat as Early as Possible? Ethically: Primum non nocere (“Above all, do no harm”) Nonmaleficence: proven safety Beneficence: proven efficacy (decrease progression and delay emergence and severity of symptoms) prevent harm from exploitation, promote safety Autonomy: patients and families should be masters of their fate Justice: care should be available to all 129 Why Diagnose and Treat as Early as Possible? Medically: Greater opportunity to care for patient and families Pathways are potentially most viable and function at its highest (cognition, daily living functions, behavior, quality of life) Proven clinically significant benefits in populations of patients Allow patients to make own life decisions (medical, legal, financial, social, psychological) and to make beneficial lifestyle changes Possibility of entering clinical trials for experimental medications Minimizes the potential of being exploited or abused Economically: overall advantageous 130 Depends on who is paying Delaying late-stage dementia makes economic sense Effective Multifactorial Management of AD Early detection, education, communication, care coordination & support Pharmacological: reduce potential for harm; slow clinical decline using approved antiAD medications; judicial use of other Rx as needed Provide meaningful benefits to patients, families & caregivers 131 Atri A. Am J Manag Care. 2011. NonPharmacological: behavioral strategies; ongoing monitoring of health & safety and providing support to patient & caregivers Summary Early diagnosis and management of AD is ethically, medically, scientifically and economically supported Multifactorial AD care involves a combination of nonpharmacological and pharmacological approaches; it can: 132 ameliorate current symptoms delay and reduce emerging problem behaviors reduce the pace of overall clinical decline delay nursing home placement lower the impact of illness on patients and caregiver provide palliation Provide cumulative and meaningful benefits over the course of illness To cure sometimes To help often To console always 133