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Singh S, Zhong S, Rogers K, Hachinski V, Frisbee S. Prioritizing determinants of cognitive function in healthy middle-aged and older adults: insights from a machine learning regression approach in the Canadian longitudinal study on aging. Front Public Health 2023; 11:1290064. [PMID: 38186704 PMCID: PMC10768541 DOI: 10.3389/fpubh.2023.1290064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2023] [Accepted: 12/04/2023] [Indexed: 01/09/2024] Open
Abstract
Introduction The preservation of healthy cognitive function is a crucial step toward reducing the growing burden of cognitive decline and impairment. Our study aims to identify the characteristics of an individual that play the greatest roles in determining healthy cognitive function in mid to late life. Methods Data on the characteristics of an individual that influence their health, also known as determinants of health, were extracted from the baseline cohort of the Canadian Longitudinal Study of Aging (2015). Cognitive function was a normalized latent construct score summarizing eight cognitive tests administered as a neuropsychological battery by CLSA staff. A higher cognitive function score indicated better functioning. A penalized regression model was used to select and order determinants based on their strength of association with cognitive function. Forty determinants (40) were entered into the model including demographic and socioeconomic factors, lifestyle and health behaviors, clinical measures, chronic diseases, mental health status, social support and the living environment. Results The study sample consisted mainly of White, married, men and women aged 45-64 years residing in urban Canada. Mean overall cognitive function score for the study sample was 99.5, with scores ranging from 36.6 to 169.2 (lowest to highest cognitive function). Thirty-five (35) determinants were retained in the final model as significantly associated with healthy cognitive functioning. The determinants demonstrating the strongest associations with healthy cognitive function, were race, immigrant status, nutritional risk, community belongingness, and satisfaction with life. The determinants demonstrating the weakest associations with healthy cognitive function, were physical activity, greenness and neighborhood deprivation. Conclusion Greater prioritization and integration of demographic and socioeconomic factors and lifestyle and health behaviors, such greater access to healthy foods and enhancing aid programs for low-income and immigrant families, into future health interventions and policies can produce the greatest gains in preserving healthy cognitive function in mid to late life.
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Affiliation(s)
- Sarah Singh
- Robarts Research Institute, University of Western Ontario, London, ON, Canada
| | - Shiran Zhong
- Department of Geography, University of Western Ontario, London, ON, Canada
| | - Kem Rogers
- Department of Anatomy and Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
| | - Vladimir Hachinski
- Robarts Research Institute, University of Western Ontario, London, ON, Canada
- Department of Clinical Neurological Sciences, and Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
| | - Stephanie Frisbee
- Department of Pathology and Laboratory Medicine, and Epidemiology and Biostatistics, Schulich School of Medicine and Dentistry, University of Western Ontario, London, ON, Canada
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Frank A, Ismail Z, Wilson M, Gauthier S, Verret L, Hsiung GYR, Borrie M. Health System Change for Alzheimer's Disease-Modifying Therapies in Canada: Beginning the Discussion. Can J Neurol Sci 2023:1-9. [PMID: 38052729 DOI: 10.1017/cjn.2023.322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2023]
Abstract
Alzheimer's disease (AD) is a neurodegenerative disorder that accounts for 60%-70% of patients with dementia, and it is estimated that over one million Canadians will be living with dementia by 2030. Disease-modifying therapies (DMTs) targeting the underlying pathophysiology of AD are currently in development. Several models have demonstrated that the potential arrival of Alzheimer's DMTs will most likely overwhelm the already-constrained Canadian healthcare system. Canada does not have a strategy to address the extensive requirements of using DMTs, including providing an early diagnosis of AD, confirming DMT eligibility via amyloid biomarkers, and conducting ongoing treatment monitoring. Thus, a multidisciplinary group of experts involved in AD care in Canada gathered to review (1) the current barriers to diagnosis and management of AD; (2) how existing clinic models, including those used in multiple sclerosis (MS), could be applied to address key barriers in AD; and (3) how to design and implement optimal care pathways in the future. The actions outlined in this review will help clinicians and healthcare systems improve readiness to integrate the use of disease-modifying therapies in Alzheimer's disease, if such therapies are approved in Canada.
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Affiliation(s)
- Andrew Frank
- Bruyere Research Institute, and University of Ottawa, Ottawa, ON, Canada
| | - Zahinoor Ismail
- Departments of Psychiatry, Clinical Neurosciences, and Community Health Sciences, Hotchkiss Brain Institute and O'Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada
| | | | - Serge Gauthier
- McGill Center for Studies in Aging and Dementia Education Program, McGill University, Montreal, QC, Canada
| | - Louis Verret
- Service de Neurologie, Clinique Interdisciplinaire de Mémoire, CHU de Québec-Université Laval, Hôpital Enfant-Jésus, Québec, QC, Canada
| | - Ging-Yuek Robin Hsiung
- Division of Neurology, Department of Medicine, University of British Columbia, Vancouver, BC, Canada
| | - Michael Borrie
- Division of Geriatric Medicine, Lawson Health Research Institute, Schulich School of Medicine & Dentistry, Western University, London, ON, Canada
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Singh SS, Zhong S, Rogers KA, Hachinski VC, Frisbee SJ. Prevalence of dementia, heart disease and stroke in community-dwelling adults in Canada, 2016-2021: opportunities for joint prevention. Arch Public Health 2023; 81:158. [PMID: 37620877 PMCID: PMC10464200 DOI: 10.1186/s13690-023-01171-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2023] [Accepted: 08/08/2023] [Indexed: 08/26/2023] Open
Abstract
INTRODUCTION This aim of this study is to provide updated estimates on the prevalence of dementia, heart disease, and stroke in Canadian communities. Targeting all three conditions together, at the community level, may be key to disease prevention and health aging in the Canadian population. METHODS Using nationwide health survey data, we calculated the age-standardized prevalence of self-reported dementia, heart disease and stroke in adults aged 18 years and over residing in Canadian communities from 2016 to 2021. Poisson regression models were used to detect statistically significant changes in the prevalence of all three conditions from 2016 to 2021. RESULTS Less than 1% (~ 175,000 individuals) of adults residing in Canadian communities reported dementia, 5% (~ 1.5 million individuals) reported heart disease, and more than 1% (~ 370,000 individuals) reported stroke annually from 2016 to 2021. Overall, the age-standardized prevalence for stroke decreased minimally from 2016 to 2021 (p = 0.0004). Although the age-standardized prevalence of heart disease and dementia decreased from 2016 to 2018, subsequent increases in prevalence from 2018 to 2021 led to a lack of overall statistically significant changes from 2016 to 2021 (p = 0.10 for heart disease and p = 0.37 for dementia). CONCLUSION Recent increases in the prevalence of dementia, heart disease and stroke in Canadian communities threaten to reverse any gains in vascular disease prevention over the past six years. Findings reveal the urgent need for intensified prevention efforts that are community-based with a focus on joint reduction in the shared risk factors contributing to all three diseases.
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Affiliation(s)
- Sarah S Singh
- Robarts Research Institute, University of Western Ontario, 100 Perth Dr, London, ON, N6A 5K8, Canada.
| | - Shiran Zhong
- Department of Geography, University of Western Ontario, London, ON, Canada
| | - Kem A Rogers
- Department of Anatomy & Cell Biology, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada
| | - Vladimir C Hachinski
- Robarts Research Institute, University of Western Ontario, 100 Perth Dr, London, ON, N6A 5K8, Canada
- Department of Clinical Neurological Sciences, and Epidemiology and Biostatistics, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada
| | - Stephanie J Frisbee
- Department of Pathology & Laboratory Medicine, and Epidemiology & Biostatistics, Schulich School of Medicine & Dentistry, University of Western Ontario, London, ON, Canada
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Impact of interventions scenarios targeting three main vascular risk factors on the future burden of dementia in France. Eur J Epidemiol 2023; 38:435-443. [PMID: 36853527 DOI: 10.1007/s10654-023-00974-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2022] [Accepted: 02/01/2023] [Indexed: 03/01/2023]
Abstract
The epidemiological and societal burden of dementia is expected to increase in the coming decades due to the world population aging. In this context, the evaluation of the potential impact of intervention scenarios aiming at reducing the prevalence of dementia risk factors is an active area of research. However, such studies must account for the associated changes in mortality and the dependence between the risk factors. Using micro-simulations, this study aims to estimate the changes in dementia burden in France in 2040 according to intervention scenarios targeting the prevention or treatment of hypertension, diabetes and physical inactivity. Accounting for their communality and their effects on mortality, the results show that the disappearance of hypertension, diabetes and physical inactivity in France in 2020 could decrease dementia prevalence by 33% among men and 26% among women in 2040 and increase the life expectancy without dementia at age 65 by 3.4 years (men) and 2.6 years (women). Among the three factors, the prevention of hypertension would be the most efficient. These projections rely on current estimates of the risk of dementia and death associated with risk factors. Thanks to the R package developed they could be refined for different countries or different interventions and updated with new estimates.
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Blum S, Conen D. Mechanisms and Clinical Manifestations of Cognitive Decline in Atrial Fibrillation Patients: Potential Implications for Preventing Dementia. Can J Cardiol 2023; 39:159-171. [PMID: 36252904 DOI: 10.1016/j.cjca.2022.10.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2022] [Revised: 10/10/2022] [Accepted: 10/11/2022] [Indexed: 02/07/2023] Open
Abstract
Atrial fibrillation (AF) patients face an approximate 1.5-fold increased risk of cognitive decline compared with the general population. Among poststroke AF patients, the risk of cognitive decline is even higher with an estimated threefold increase. This article provides a narrative review on the current evidence and highlights gaps in knowledge and areas for future research. Although earlier studies hypothesized that the association between AF and cognitive decline is mainly a consequence of previous ischemic strokes, more recent evidence also suggests such an association in AF patients without a history of clinical stroke. Because AF and cognitive decline mainly occur among elderly individuals, it is not surprising that both entities share multiple risk factors. In addition to clinically overt ischemic strokes, silent brain infarcts and other brain injury are likely mechanisms for the increased risk of cognitive decline among AF patients. Oral anticoagulation for stroke prevention in AF patients with additional stroke risk factors is one of the only proven therapies to prevent brain injury. Whether a broader use of oral anticoagulation, or more intense anticoagulation in some patients are beneficial in this context needs to be addressed in future studies. Although direct studies are lacking, it is reasonable to recommend optimal treatment of comorbidities and risk factors for the prevention of cognitive decline and dementia.
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Affiliation(s)
- Steffen Blum
- Cardiovascular Research Institute Basel, University Hospital Basel, University of Basel, Basel, Switzerland; Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - David Conen
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada.
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Hyle EP, Foote JHA, Shebl FM, Qian Y, Reddy KP, Mukerji SS, Wattananimitgul N, Viswanathan A, Schwamm LH, Pandya A, Freedberg KA. Development and validation of the age-associated dementia policy (AgeD-Pol) computer simulation model in the USA and Europe. BMJ Open 2022; 12:e056546. [PMID: 35793913 PMCID: PMC9260808 DOI: 10.1136/bmjopen-2021-056546] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2021] [Accepted: 05/25/2022] [Indexed: 12/05/2022] Open
Abstract
OBJECTIVE To develop and validate a novel, microsimulation model that accounts for the prevalence and incidence of age-associated dementias (AAD), disease progression and associated mortality. DESIGN, DATA SOURCES AND OUTCOME MEASURES We developed the AAD policy (AgeD-Pol) model, a microsimulation model to simulate the natural history, morbidity and mortality associated with AAD. We populated the model with age-stratified and sex-stratified data on AAD prevalence, AAD incidence and mortality among people with AAD. We first performed internal validation using data from the Adult Changes in Thought (ACT) cohort study. We then performed external validation of the model using data from the Framingham Heart Study, the Rotterdam Study and Kaiser Permanente Northern California (KPNC). We compared model-projected AAD cumulative incidence and mortality with published cohort data using mean absolute percentage error (MAPE) and root-mean-square error (RMSE). RESULTS In internal validation, the AgeD-Pol model provided a good fit to the ACT cohort for cumulative AAD incidence, 10.4% (MAPE, 0.2%) and survival, 66.5% (MAPE, 8.8%), after 16 years of follow-up among those initially aged 65-69 years. In the external validations, the model-projected lifetime cumulative incidence of AAD was 30.5%-32.4% (females) and 16.7%-23.0% (males), using data from the Framingham and Rotterdam cohorts, and AAD cumulative incidence was 21.5% over 14 years using KPNC data. Model projections demonstrated a good fit to all three cohorts (MAPE, 0.9%-9.0%). Similarly, model-projected survival provided good fit to the Rotterdam (RMSE, 1.9-3.6 among those with and without AAD) and KPNC cohorts (RMSE, 7.6-18.0 among those with AAD). CONCLUSIONS The AgeD-Pol model performed well when validated to published data for AAD cumulative incidence and mortality and provides a useful tool to project the AAD disease burden for health systems planning in the USA.
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Affiliation(s)
- Emily P Hyle
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Harvard University Center for AIDS Research, Cambridge, Massachusetts, USA
| | - Julia H A Foote
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Fatma M Shebl
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
| | - Yiqi Qian
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Krishna P Reddy
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Division of Pulmonary and Critical Care Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Shibani S Mukerji
- Harvard Medical School, Boston, Massachusetts, USA
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Nattanicha Wattananimitgul
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Anand Viswanathan
- Harvard Medical School, Boston, Massachusetts, USA
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lee H Schwamm
- Harvard Medical School, Boston, Massachusetts, USA
- Department of Neurology, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Ankur Pandya
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Kenneth A Freedberg
- Medical Practice Evaluation Center, Department of Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts, USA
- Harvard Medical School, Boston, Massachusetts, USA
- Harvard University Center for AIDS Research, Cambridge, Massachusetts, USA
- Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
- Division of General Internal Medicine, Massachusetts General Hospital, Boston, Massachusetts, USA
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Brück CC, Wolters FJ, Ikram MA, de Kok IMCM. Projected prevalence and incidence of dementia accounting for secular trends and birth cohort effects: a population-based microsimulation study. Eur J Epidemiol 2022; 37:807-814. [PMID: 35731313 PMCID: PMC9215138 DOI: 10.1007/s10654-022-00878-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2021] [Accepted: 04/25/2022] [Indexed: 11/30/2022]
Abstract
There is need for accurate projections of the future dementia burden to prepare healthcare systems and policymakers. Existing projections only account for population ageing, not for observed declines in age-specific dementia incidence of 13% per decade. We developed a dementia microsimulation model that synthesizes population-based data from the Rotterdam Study with changes in demographics between birth cohorts from the early 1900s onwards. We determined dementia prevalence and incidence until 2050 for three different dementia incidence trend scenarios: (1) stable age-specific incidence, (2) linear decline by 13% per decade, (3) nonlinear declines averaging 13% per decade. Assuming a stable age-specific incidence resulted in a 130% increase in incidence and 118% in prevalence between 2020 and 2050. By contrast, the linearly declining trend resulted in substantially smaller increases of 58% in incidence (95%CI: 29–87%), and 43% in prevalence (95%CI: 13–66%), corresponding to 39% lower incidence and 36% lower prevalence by 2050 than in the stable-incidence scenario. Results for various non-linear declines fell between the stable and linear trend. The future burden of dementia is highly susceptible to achievable changes in age-specific incidence. Extension of previously established secular trends globally would reduce widely upheld projections of new dementia cases until 2050 by 39%.
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Affiliation(s)
- Chiara Celine Brück
- Department of Public Health, Erasmus MC University Medical Center, Rotterdam, the Netherlands.
| | - Frank J Wolters
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - M Arfan Ikram
- Department of Epidemiology, Erasmus MC University Medical Center, Rotterdam, the Netherlands
| | - Inge M C M de Kok
- Department of Public Health, Erasmus MC University Medical Center, Rotterdam, the Netherlands
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Kontto J, Paalanen L, Sund R, Sainio P, Koskinen S, Demakakos P, Tolonen H, Härkänen T. Using multiple imputation and intervention-based scenarios to project the mobility of older adults. BMC Geriatr 2022; 22:311. [PMID: 35397525 PMCID: PMC8994920 DOI: 10.1186/s12877-022-03008-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 03/30/2022] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Projections of the development of mobility limitations of older adults are needed for evidence-based policy making. The aim of this study was to generate projections of mobility limitations among older people in the United States, England, and Finland.
Methods
We applied multiple imputation modelling with bootstrapping to generate projections of stair climbing and walking limitations until 2026. A physical activity intervention producing a beneficial effect on self-reported activities of daily living measures was identified in a comprehensive literature search and incorporated in the scenarios used in the projections. We utilised the harmonised longitudinal survey data from the Ageing Trajectories of Health – Longitudinal Opportunities and Synergies (ATHLOS) project (N = 24,982).
Results
Based on the scenarios from 2012 to 2026, the prevalence of walking limitations will decrease from 9.4 to 6.4%. A physical activity intervention would decrease the prevalence of stair climbing limitations compared with no intervention from 28.9 to 18.9% between 2012 and 2026.
Conclusions
A physical activity intervention implemented on older population seems to have a positive effect on maintaining mobility in the future. Our method provides an interesting option for generating projections by incorporating intervention-based scenarios.
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Maxwell CJ, Maclagan LC, Harris DA, Wang X, Guan J, Marrie RA, Hogan DB, Austin PC, Vigod SN, Swartz RH, Bronskill SE. Incidence of neurological and psychiatric comorbidity over time: a population-based cohort study in Ontario, Canada. Age Ageing 2022; 51:6520504. [PMID: 35134841 DOI: 10.1093/ageing/afab277] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 10/14/2021] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION Comprehensive, population-based investigations of the extent and temporality of associations between common neurological and psychiatric disorders are scarce. METHODS This retrospective cohort study used linked health administrative data for Ontarians aged 40-85 years on 1 April 2002, to estimate the adjusted rate of incident dementia, Parkinson's disease (PD), stroke or mood/anxiety disorder (over 14 years) according to the presence and time since diagnosis of a prior disorder. Sex differences in the cumulative incidence of a later disorder were also examined. RESULTS The cohort included 5,283,546 Ontarians (mean age 56.2 ± 12.1 years, 52% female). The rate of dementia was significantly higher for those with prior PD (adjusted hazard ratio [adjHR] 4.05, 95% confidence interval [CI] 3.99-4.11); stroke (adjHR 2.49, CI 2.47-2.52) and psychiatric disorder (adjHR 1.79, CI 1.78-1.80). The rate of PD was significantly higher for those with prior dementia (adjHR 2.23, CI 2.17-2.30) and psychiatric disorder (adjHR 1.77, CI 1.74-1.81). The rate of stroke was significantly higher among those with prior dementia (adjHR 1.56, CI 1.53-1.58). Prior dementia (adjHR 2.36, CI 2.33-2.39), PD (adjHR 1.80, CI 1.75-1.85) and stroke (adjHR 1.47, CI 1.45-1.49) were associated with a higher rate of an incident psychiatric disorder. Generally, associations were strongest in the 6 months following a prior diagnosis and demonstrated a J-shape relationship over time. Significant sex differences were evident in the absolute risks for several disorders. CONCLUSIONS The observed nature of bidirectional associations between these neurological and psychiatric disorders indicates opportunities for earlier diagnosis and interventions to improve patient care.
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Affiliation(s)
- Colleen J Maxwell
- Schools of Pharmacy and Public Health, Sciences University of Waterloo, Waterloo, Ontario, Canada
- ICES, Toronto, Ontario, Canada
| | | | - Daniel A Harris
- ICES, Toronto, Ontario, Canada
- Public Health Sciences, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | | | | | - Ruth Ann Marrie
- Departments of Internal Medicine and Community Health Sciences, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, Manitoba, Canada
| | - David B Hogan
- Division of Geriatric Medicine, Department of Medicine, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Peter C Austin
- ICES, Toronto, Ontario, Canada
- Institute of Health Policy, Management & Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
| | - Simone N Vigod
- ICES, Toronto, Ontario, Canada
- Women’s College Research Institute, Women’s College Hospital, Toronto, Ontario, Canada
- Department of Psychiatry, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Richard H Swartz
- ICES, Toronto, Ontario, Canada
- Department of Medicine (Neurology), Hurvitz Brain Sciences Program, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Susan E Bronskill
- ICES, Toronto, Ontario, Canada
- Institute of Health Policy, Management & Evaluation, Dalla Lana School of Public Health, University of Toronto, Toronto, Ontario, Canada
- Women’s College Research Institute, Women’s College Hospital, Toronto, Ontario, Canada
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Adedeji IA, Ogunniyi A, Henderson DC, Sam-Agudu NA. Experiences and practices of caregiving for older persons living with dementia in African countries: A qualitative scoping review. DEMENTIA 2022; 21:995-1011. [PMID: 34978956 DOI: 10.1177/14713012211065398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND The increasing awareness and diagnosis of dementia in Africa necessitate documentation of caregiving practices to understand local patterns and improve the quality of care. Caregiving in African communities is rooted in informal-communal social organization. This scoping review analyses caregiver characteristics and experiences, and practices of caregiving for persons living with dementia in Africa. METHODS A total of 152 references were retrieved, with 64 references obtained from PubMed, 85 from AJOL, and three from Scopus. Based on the relevance of titles, 83 references were further retained from PubMed (64), AJOL (16), and Scopus (3). A rapid review of abstracts was done in Distiller SR, and finally, six relevant articles were content-analyzed using Atlas ti 8.4 qualitative analysis software. RESULTS All six included studies were published between 2003 and 2018. Four themes were identified: article characteristics, caregiver characteristics, caregiver in context, and caregiver potentialities (challenges and opportunities). Studies reported findings from research conducted in four African countries: three from Nigeria, and one each from South Africa, Egypt, and Tanzania. Caregivers of persons living with dementia typically had eight years or less of formal education, were unpaid, and spent a daily average of 13 hours in caregiving. Cultural thresholds and individual caregiver differences underlie the interpretation of stressors across cultures. Caregivers lack the right training and information as well as support systems to improve their role performance and reduce accumulated stress. CONCLUSION In African countries, informational and educational platforms are essential for improved individual dementia caregiving, vis-à-vis strengthened roles of governments, and religious/traditional leaders and organizations.
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Affiliation(s)
- Isaac A Adedeji
- Department of Sociology, 107991Olabisi Onabanjo University, Ago-Iwoye, Nigeria
| | - Adesola Ogunniyi
- Department of Medicine, 58987University College Hospital, Ibadan, Nigeria
| | - David C Henderson
- Department of Psychiatry, 1846Boston University School of Medicine, USA
| | - Nadia A Sam-Agudu
- International Research Center of Excellence, 12264Institute of Human Virology Nigeria, Abuja, Nigeria.,Department of Paediatrics and Child Health, University of Cape Coast School of Medical Sciences, Cape Coast, Ghana.,Division of Epidemiology and Prevention, Institute of Human Virology, 12264University of Maryland School of Medicine, Baltimore, USA
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Kopec JA, Sayre EC, Okhmatovskaia A, Cibere J, Li LC, Bansback N, Wong H, Ghanbarian S, Esdaile JM. A comparison of three strategies to reduce the burden of osteoarthritis: A population-based microsimulation study. PLoS One 2021; 16:e0261017. [PMID: 34879102 PMCID: PMC8654220 DOI: 10.1371/journal.pone.0261017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2021] [Accepted: 11/22/2021] [Indexed: 12/12/2022] Open
Abstract
Objectives The purpose of this study was to compare three strategies for reducing population health burden of osteoarthritis (OA): improved pharmacological treatment of OA-related pain, improved access to joint replacement surgery, and prevention of OA by reducing obesity and overweight. Methods We applied a validated computer microsimulation model of OA in Canada. The model simulated a Canadian-representative open population aged 20 years and older. Variables in the model included demographics, body mass index, OA diagnosis, OA treatment, mortality, and health-related quality of life. Model parameters were derived from analyses of national surveys, population-based administrative data, a hospital-based cohort study, and the literature. We compared 8 what-if intervention scenarios in terms of disability-adjusted life years (DALYs) relative to base-case, over a wide range of time horizons. Results Reductions in DALYs depended on the type of intervention, magnitude of the intervention, and the time horizon. Medical interventions (a targeted increase in the use of painkillers) tended to produce effects quickly and were, therefore, most effective over a short time horizon (a decade). Surgical interventions (increased access to joint replacement) were most effective over a medium time horizon (two decades or longer). Preventive interventions required a substantial change in BMI to generate a significant impact, but produced more reduction in DALYs than treatment strategies over a very long time horizon (several decades). Conclusions In this population-based modeling study we assessed the potential impact of three different burden reduction strategies in OA. Data generated by our model may help inform the implementation of strategies to reduce the burden of OA in Canada and elsewhere.
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Affiliation(s)
- Jacek A. Kopec
- University of British Columbia, Vancouver, British Columbia, Canada
- * E-mail:
| | - Eric C. Sayre
- Arthritis Research Canada, Richmond, British Columbia, Canada
| | | | - Jolanda Cibere
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Linda C. Li
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Nick Bansback
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Hubert Wong
- University of British Columbia, Vancouver, British Columbia, Canada
| | - Shahzad Ghanbarian
- Centre of Clinical Epidemiology and Evaluation, Vancouver, British Columbia, Canada
| | - John M. Esdaile
- University of British Columbia, Vancouver, British Columbia, Canada
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Amyloid Burden in Alzheimer's Disease Patients Is Associated with Alterations in Circadian Rhythm. Dement Neurocogn Disord 2021; 20:99-107. [PMID: 34795773 PMCID: PMC8585536 DOI: 10.12779/dnd.2021.20.4.99] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2021] [Revised: 10/23/2021] [Accepted: 10/24/2021] [Indexed: 11/27/2022] Open
Abstract
Background and Purpose In this study we evaluated the relationship between amyloid-beta (Aβ) deposition and 3 aspects of sleep quality in a group of clinically diagnosed Alzheimer's disease (AD) patients. Methods We used self-report questionnaires to assess the quality of sleep using 3 previously established surveys: the Glasgow Sleep Effort Scale (GSES), the Pittsburgh Sleep Quality Index (PSQI), and the Morningness-Eveningness Questionnaire (MEQ). These questionnaires focused on the sleep effort, sleep efficiency, and circadian rhythm patterns of each participant. Also, we evaluated the regional distribution of Aβ in the brain by amyloid positron emission tomography-computed tomography (PET-CT) standardized uptake value ratios (SUVRs) in healthy normal (HN), mild cognitive impairment (MCI), and AD dementia groups. The MCI and AD dementia groups were combined to form the group with cognitive impairment due to AD (CIAD). Results GSES and MEQ scores differed significantly between the HN, MCI, and AD dementia groups (p<0.037), whereas PSQI scores were similar across the groups (p=0.129). GSES and MEQ scores also differed between the HN and CIAD groups (p<0.018). Circadian rhythm scores positively correlated with amyloid PET-CT SUVR in posterior cingulate cortices (p<0.049). Conclusions Sleep effort and abnormal shifts in circadian rhythm were more significant in the CIAD group than in the HN group. At the same time, HN subjects had minimal sleep disturbance, irrespective of clinical status. Thus, alterations in circadian rhythm may be indicative of neurodegeneration due to Aβ deposition.
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Arsenault-Lapierre G, Henein M, Rojas-Rozo L, Bergman H, Couturier Y, Vedel I. Primary care clinicians' knowledge, attitudes, and practices concerning dementia: They are willing and need support. CANADIAN FAMILY PHYSICIAN MEDECIN DE FAMILLE CANADIEN 2021; 67:731-735. [PMID: 34649895 DOI: 10.46747/cfp.6710731] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Geneviève Arsenault-Lapierre
- Senior Research Associate for the Research on Organization of Healthcare Services for Alzheimers Team at the Lady Davis Institute for Medical Research affiliated with the Jewish General Hospital in Montreal, Que, and McGill University
| | - Mary Henein
- Research assistant for the Research on Organization of Healthcare Services for Alzheimers Team at the Lady Davis Institute for Medical Research
| | - Laura Rojas-Rozo
- Research assistant for the Research on Organization of Healthcare Services for Alzheimers Team at the Lady Davis Institute for Medical Research
| | - Howard Bergman
- Assistant Dean of Internal Affairs in the Faculty of Medicine at McGill University, and Professor of Family Medicine in the Department of Medicine and Oncology and the Institute for Health and Social Policy at McGill University
| | - Yves Couturier
- Tenured Professor at the University of Sherbrooke in Quebec and Scientific Director of the Réseau de connaissances en services et soins de santé intégrés de première ligne
| | - Isabelle Vedel
- Associate Professor and Graduate Program Director (MSc) at the University of McGill
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Blais AA, Tremblay C, Guarnaccia L, Tremblay L, Laflamme-Thibault S, Côté S, Tremblay P, Bouchard J, da Silva RA. The Importance of Adapting Functional Test Instructions for Older Adults with Neurocognitive Disorders. PHYSICAL & OCCUPATIONAL THERAPY IN GERIATRICS 2021. [DOI: 10.1080/02703181.2021.1920654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Audrey-Ann Blais
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
| | - Cynthia Tremblay
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
| | - Laury Guarnaccia
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
| | - Léane Tremblay
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
| | - Sandrine Laflamme-Thibault
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
| | - Sharlene Côté
- Centre intégré de santé et services sociaux du Saguenay-Lac-Saint-Jean (CIUSSS SLSJ), Saguenay, Québec, Canada
| | - Patrice Tremblay
- Centre intégré de santé et services sociaux du Saguenay-Lac-Saint-Jean (CIUSSS SLSJ), Saguenay, Québec, Canada
| | - Julie Bouchard
- Département des Sciences de la Santé, Centre intersectoriel en santé durable, Laboratoire de recherche BioNR, Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
- Centre intégré de santé et services sociaux du Saguenay-Lac-Saint-Jean (CIUSSS SLSJ), Saguenay, Québec, Canada
| | - Rubens A. da Silva
- Programme de physiothérapie de l’Université McGill offert en extension à l’Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
- Département des Sciences de la Santé, Centre intersectoriel en santé durable, Laboratoire de recherche BioNR, Université du Québec à Chicoutimi (UQAC), Saguenay, Québec, Canada
- Centre intégré de santé et services sociaux du Saguenay-Lac-Saint-Jean (CIUSSS SLSJ), Saguenay, Québec, Canada
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15
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Arsenault-Lapierre G. [Not Available]. CANADIAN FAMILY PHYSICIAN MEDECIN DE FAMILLE CANADIEN 2021; 67:e275-e279. [PMID: 34649910 PMCID: PMC8516169 DOI: 10.46747/cfp.6710e275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- Geneviève Arsenault-Lapierre
- Associée de recherche principale pour l’équipe Recherche en organisation des services sur l’Alzheimer à l’Institut Lady Davis de recherches médicales affilié à l’Hôpital général juif à Montréal et à l’Université McGill (Québec)
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Tastevin M, Lavoie M, de la Sablonnière J, Carrier-Auclair J, Laforce R. Survival in the Three Common Variants of Primary Progressive Aphasia: A Retrospective Study in a Tertiary Memory Clinic. Brain Sci 2021; 11:brainsci11091113. [PMID: 34573135 PMCID: PMC8466819 DOI: 10.3390/brainsci11091113] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Revised: 08/19/2021] [Accepted: 08/22/2021] [Indexed: 11/16/2022] Open
Abstract
Knowledge on the natural history of the three main variants of primary progressive aphasia (PPA) is lacking, particularly regarding mortality. Moreover, advanced stages and end of life issues are rarely discussed with caregivers and families at diagnosis, which can cause more psychological distress. We analyzed data from 83 deceased patients with a diagnosis of PPA. We studied survival in patients with a diagnosis of logopenic variant (lvPPA), semantic variant (svPPA), or non-fluent variant (nfvPPA) and examined causes of death. From medical records, we retrospectively collected data for each patient at several time points spanning five years before the first visit to death. When possible, interviews were performed with proxies of patients to complete missing data. Results showed that survival from symptom onset and diagnosis was significantly longer in svPPA than in lvPPA (p = 0.002) and nfvPPA (p < 0.001). No relevant confounders were associated with survival. Mean survival from symptom onset was 7.6 years for lvPPA, 7.1 years for nfvPPA, and 12 years for svPPA. The most common causes of death were natural cardio-pulmonary arrest and pneumonia. Aspiration pneumonia represented 23% of deaths in nfvPPA. In conclusion, this pilot study found significant differences in survival between the three variants of PPA with svPPA showing the longest and nfvPPA showing more neurologically-related causes of death.
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Nakanishi A, Cuthbertson L, Chase J. Advance Requests for Medical Assistance in Dying in Dementia: a Survey Study of Dementia Care Specialists. Can Geriatr J 2021; 24:82-95. [PMID: 34079602 PMCID: PMC8137455 DOI: 10.5770/cgj.24.496] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
Background Current Canadian Medical Assistance in Dying (MAiD) legislation requires individuals to have the mental capacity to consent at the time of the procedure. Advance requests for MAiD (ARs for MAiD) could allow individuals to document conditions where MAiD would be desired in the setting of progressive dementia. Methods Greater Vancouver area dementia care clinicians from family practice, geriatric medicine, geriatric psychiatry, and palliative care were approached to participate in an online survey to assess attitudes around the appropriateness of ARs for MAiD. Quantitative analysis of survey questions and qualitative analysis of open-ended response questions were performed. Results Of 630 clinicians approached, 80 were included in the data analysis. 64% of respondents supported legislation allowing ARs for MAiD in dementia. 96% of respondents articulated barriers and concerns, including determination of capacity, protecting the interests of the future individual, navigating conflict among stakeholders, and identifying coercion. 78% of respondents agreed with a mandatory capacity assessment to create an AR, and 59% agreed that consensus between clinicians and substitute decision-makers was required to enact an AR. Conclusion The majority of Vancouver dementia care clinicians participating in this study support legislation allowing ARs for MAiD in dementia, while also articulating ethical and logistical concerns with its application.
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Affiliation(s)
- Allison Nakanishi
- Geriatric Medicine, Vancouver Island Health Authority, Victoria, BC.,Division of Geriatric Medicine, University of British Columbia, Vancouver, BC
| | - Lauren Cuthbertson
- Division of Geriatric Medicine, University of British Columbia, Vancouver, BC
| | - Jocelyn Chase
- Division of Geriatric Medicine, University of British Columbia, Vancouver, BC.,Geriatric Medicine, Providence Health Care, Vancouver, BC
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Gibicar A, Moody AR, Khademi A. Automated Midline Estimation for Symmetry Analysis of Cerebral Hemispheres in FLAIR MRI. Front Aging Neurosci 2021; 13:644137. [PMID: 33994994 PMCID: PMC8118126 DOI: 10.3389/fnagi.2021.644137] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 03/24/2021] [Indexed: 01/09/2023] Open
Abstract
To perform brain asymmetry studies in large neuroimaging archives, reliable and automatic detection of the interhemispheric fissure (IF) is needed to first extract the cerebral hemispheres. The detection of the IF is often referred to as mid-sagittal plane estimation, as this plane separates the two cerebral hemispheres. However, traditional planar estimation techniques fail when the IF presents a curvature caused by existing pathology or a natural phenomenon known as brain torque. As a result, midline estimates can be inaccurate. In this study, a fully unsupervised midline estimation technique is proposed that is comprised of three main stages: head angle correction, control point estimation and midline generation. The control points are estimated using a combination of intensity, texture, gradient, and symmetry-based features. As shown, the proposed method automatically adapts to IF curvature, is applied on a slice-to-slice basis for more accurate results and also provides accurate delineation of the midline in the septum pellucidum, which is a source of failure for traditional approaches. The method is compared to two state-of-the-art methods for midline estimation and is validated using 75 imaging volumes (~3,000 imaging slices) acquired from 38 centers of subjects with dementia and vascular disease. The proposed method yields the lowest average error across all metrics: Hausdorff distance (HD) was 0.32 ± 0.23, mean absolute difference (MAD) was 1.10 ± 0.38 mm and volume difference was 7.52 ± 5.40 and 5.35 ± 3.97 ml, for left and right hemispheres, respectively. Using the proposed method, the midline was extracted for 5,360 volumes (~275K images) from 83 centers worldwide, acquired by GE, Siemens and Philips scanners. An asymmetry index was proposed that automatically detected outlier segmentations (which were <1% of the total dataset). Using the extracted hemispheres, hemispheric asymmetry texture biomarkers of the normal-appearing brain matter (NABM) were analyzed in a dementia cohort, and significant differences in biomarker means were found across SCI and MCI and SCI and AD.
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Affiliation(s)
- Adam Gibicar
- Electrical, Computer and Biomedical Engineering Department, Ryerson University, Toronto, ON, Canada
| | - Alan R Moody
- Department of Medical Imaging, University of Toronto, Toronto, ON, Canada
| | - April Khademi
- Electrical, Computer and Biomedical Engineering Department, Ryerson University, Toronto, ON, Canada.,Keenan Research Center for Biomedical Science, St. Michael's Hospital, Unity Health Network, Toronto, ON, Canada.,Institute for Biomedical Engineering, Science and Technology, A Partnership Between St. Michael's Hospital and Ryerson University, Toronto, ON, Canada
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Désormeaux-Moreau M, Michel CM, Vallières M, Racine M, Poulin-Paquet M, Lacasse D, Gionet P, Genereux M, Lachiheb W, Provencher V. Mobile Apps to Support Family Caregivers of People With Alzheimer Disease and Related Dementias in Managing Disruptive Behaviors: Qualitative Study With Users Embedded in a Scoping Review. JMIR Aging 2021; 4:e21808. [PMID: 33861207 PMCID: PMC8087965 DOI: 10.2196/21808] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 01/30/2021] [Accepted: 02/14/2021] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND People with Alzheimer disease and related dementias often display disruptive behaviors (eg, aggression, wandering, and restlessness), which increase family caregivers' burden of care. However, there are few tools currently available to help these caregivers manage disruptive behaviors. Mobile apps could meet this need, but to date little is known about them. OBJECTIVE The aims of our study were to identify existing mobile apps designed to support family caregivers of people with Alzheimer disease and related dementias in managing disruptive behaviors; explore whether family caregivers view these mobile apps as relevant to meeting their needs and as useful in managing disruptive behaviors; and document the types of mobile apps that are of interest and appeal to most family caregivers (with regard to format, ergonomics, and clarity). METHODS A review of mobile apps initially conducted in February 2018 was updated in March 2019 with 2 platforms (App Store [Apple Inc.] and Google Play [Google]). The selected apps were first analyzed independently by 3 raters (2 students and 1 researcher) for each of the platforms. A focus group discussion was then held with 4 family caregivers to explore their perceptions of the apps according to their needs and interests. The content of the discussion was analyzed. RESULTS Initially, 7 of 118 apps identified met the inclusion criteria. An eighth app, recommended by one of the knowledge users, was added later. Four family caregivers (women aged between 58 and 78 years) participated in the discussion. Participants expressed a preference for easy-to-understand apps that provide concrete intervention strategies. They reported being most inclined to use two apps, Dementia Advisor and DTA Behaviours. CONCLUSIONS Few mobile apps on the market meet the needs of family caregivers in terms of content and usability. Our results could help to address this gap by identifying what family caregivers deem relevant in a mobile app to help them manage disruptive behaviors.
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Affiliation(s)
- Marjorie Désormeaux-Moreau
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
- Institut universitaire de première ligne en santé et services sociaux, Centre intégré universitaire de santé et de services sociaux de l'Estrie, Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Charlie-Maude Michel
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Mélanie Vallières
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Maryse Racine
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Myriame Poulin-Paquet
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Delphine Lacasse
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Pascale Gionet
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
| | - Melissa Genereux
- Department of Community Health Sciences, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
- Public Health Directory, Centre intégré universitaire de santé et de services sociaux de l'Estrie, Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Wael Lachiheb
- Research Center on Aging, Centre intégré universitaire de santé et de services sociaux de l'Estrie, Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Véronique Provencher
- School of Rehabilitation, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, QC, Canada
- Research Center on Aging, Centre intégré universitaire de santé et de services sociaux de l'Estrie, Centre hospitalier universitaire de Sherbrooke, Sherbrooke, QC, Canada
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Choukou MA, Mbabaali S, East R. Healthcare Professionals' Perspective on Implementing a Detector of Behavioural Disturbances in Long-Term Care Homes. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2021; 18:2720. [PMID: 33800257 PMCID: PMC7967440 DOI: 10.3390/ijerph18052720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/11/2021] [Revised: 02/28/2021] [Accepted: 03/02/2021] [Indexed: 11/25/2022]
Abstract
The number of Canadians with dementia is expected to rise to 674,000 in the years to come. Finding ways to monitor behavioural disturbance in patients with dementia (PwDs) is crucial. PwDs can unintentionally behave in ways that are harmful to them and the people around them, such as other residents or care providers. Current practice does not involve technology to monitor PwD behaviours. Events are reported randomly by nonstaff members or when a staff member notices the absence of a PwD from a scheduled event. This study aims to explore the potential of implementing a novel detector of behavioural disturbances (DBD) in long-term care homes by mapping the perceptions of healthcare professionals and family members about this technology. Qualitative information was gathered from a focus group involving eight healthcare professionals working in a tertiary care facility and a partner of a resident admitted in the same facility. Thematic analysis resulted in three themes: (A) the ability of the DBD to detect relevant dementia-related behavioural disturbances that are typical of PwD; (B) the characteristics of the DBD and clinical needs and preferences; (C) the integration of the DBD into daily routines. The results tend to confirm the adequacy of the DBD to the day-to-day needs for the detection of behavioural disturbances and hazardous behaviours. The DBD was considered to be useful and easy to use in the tertiary care facility examined in this study. The participants intend to use the DBD in the future, which means that it has a high degree of acceptance.
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Affiliation(s)
- Mohamed-Amine Choukou
- Department of Occupational Therapy, College of Rehabilitation Sciences, University of Manitoba, Winnipeg, MB R3E 0T6, Canada; (S.M.); (R.E.)
- Riverview Health Centre, Winnipeg, MB R3L 2P4, Canada
- Centre on Aging, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
| | - Sophia Mbabaali
- Department of Occupational Therapy, College of Rehabilitation Sciences, University of Manitoba, Winnipeg, MB R3E 0T6, Canada; (S.M.); (R.E.)
| | - Ryan East
- Department of Occupational Therapy, College of Rehabilitation Sciences, University of Manitoba, Winnipeg, MB R3E 0T6, Canada; (S.M.); (R.E.)
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Normal pressure hydrocephalus: Diagnostic delay. ACTA ACUST UNITED AC 2020; 40:656-663. [PMID: 33275344 PMCID: PMC7808784 DOI: 10.7705/biomedica.5382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Indexed: 11/21/2022]
Abstract
Introduction: Normotensive hydrocephalus is a differential diagnosis in the evaluation of the dementia syndrome. The diagnostic protocols would allow detecting this pathology that has more effective treatment than other dementias. Objective: To describe a population with clinical suspicion of normal pressure hydrocephalus evaluated in a Colombian psychiatric hospital and discuss the possible reasons for its diagnostic and therapeutic delay. Materials and methods: We conducted a retrospective study of medical records to identify patients with suspected normal pressure hydrocephalus during a 5-year period. Results: Thirty-five patients with suspected normal pressure hydrocephalus underwent diagnostic lumbar puncture and five of them were considered candidates for a peritoneal-venous shunt, but none underwent this surgical procedure. After three to six months of the lumbar puncture, the gait pattern improved in 22.8% of the patients, cognition in 22.8%, and sphincter control in 11.4%. Improvement was not sustained in the long term (1 year) in any of them. Conclusion: This study suggests the poor implementation of the protocols for evaluating patients with cognitive deficits and delays in the diagnosis of normal pressure hydrocephalus. A small number of patients were identified as candidates for treatment. Normal pressure hydrocephalus is a potentially reversible clinical entity with the placement of a peritoneal ventricular shunt, but delays in diagnosis and treatment have deleterious consequences for patients and their families.
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Snowden TM, Hinde AK, Reid HM, Christie BR. Does Mild Traumatic Brain Injury Increase the Risk for Dementia? A Systematic Review and Meta-Analysis. J Alzheimers Dis 2020; 78:757-775. [DOI: 10.3233/jad-200662] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Background: Mild traumatic brain injury (mTBI) is a putative risk factor for dementia; however, despite having apparent face validity, the evidence supporting this hypothesis remains inconclusive. Understanding the role of mTBI as a risk factor is becoming increasingly important given the high prevalence of mTBI, and the increasing societal burden of dementia. Objective: Our objective was to use the Preferred Reporting Items for Systematic Reviews and Meta-Analysis (PRISMA) format to determine if an association exists between mTBI and dementia and related factors, and to quantify the degree of risk. Methods: In this format, two authors conducted independent database searches of PubMed, PsycInfo, and CINAHL using three search blocks to find relevant papers published between 2000 and 2020. Relevant studies were selected using pre-defined inclusion/exclusion criteria, and bias scoring was performed independently by the two authors before a subset of studies was selected for meta-analysis. Twenty-one studies met the inclusion criteria for this systematic review. Results: The meta-analysis yielded a pooled odds ratio of 1.96 (95% CI 1.698–2.263), meaning individuals were 1.96 times more likely to be diagnosed with dementia if they had a prior mTBI. Most studies examining neuropsychiatric and neuroimaging correlates of dementia found subtle, persistent changes after mTBI. Conclusion: These results indicate that mTBI is a risk factor for the development of dementia and causes subtle changes in performance on neuropsychiatric testing and brain structure in some patients.
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Affiliation(s)
- Taylor M. Snowden
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
| | - Anthony K. Hinde
- Island Medical Program, University of British Columbia, Victoria, BC, Canada
| | - Hannah M.O. Reid
- Island Medical Program, University of British Columbia, Victoria, BC, Canada
| | - Brian R. Christie
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Island Medical Program, University of British Columbia, Victoria, BC, Canada
- Department of Psychology, University of British Columbia, Vancouver, BC, Canada
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Ault L, Goubran R, Wallace B, Lowden H, Knoefel F. Smart home technology solution for night-time wandering in persons with dementia. J Rehabil Assist Technol Eng 2020; 7:2055668320938591. [PMID: 35186320 PMCID: PMC8855416 DOI: 10.1177/2055668320938591] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2018] [Accepted: 05/28/2020] [Indexed: 11/15/2022] Open
Abstract
Introduction More than half of persons with dementia will experience night-time wandering, increasing their risk of falls and unattended home exits. This is a major predictor of caregiver burnout and one of the major causes of early institutionalization. Methods Using smart home technologies such as sensors, smart bulbs, pressure mats and speakers, the Night-time Wandering Detection and Diversion system is designed to assist caregivers and persons with dementia that are at risk of wandering at night. Being placed in homes around Ottawa for a 12-week trial, the system allows caregivers to rest peacefully in the night, as it detects when the person with dementia gets out of bed and automatically provides cue lighting to guide them safely to the washroom. The system also uses prerecorded audio prompts, if they venture from the bedroom, only waking the caregiver when the person with dementia opens an exit door. Results Thus far, the average depression and anxiety in caregivers have been improved after the 12 weeks, and most have said that they sleep more peacefully. Conclusion The system has proven successful in supporting the safety of persons with dementia as well as their caregivers.
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Affiliation(s)
- Laura Ault
- Bruyère Research Institute, Ottawa, ON, Canada
- AGE-WELL SAM3 National Innovation Hub, Ottawa, ON, Canada
| | - Rafik Goubran
- Bruyère Research Institute, Ottawa, ON, Canada
- AGE-WELL SAM3 National Innovation Hub, Ottawa, ON, Canada
- Faculty of Engineering, Carleton University, Ottawa, ON, Canada
- Technology Assisted Friendly Environment for the Third Age, Ottawa, ON, Canada
| | - Bruce Wallace
- Bruyère Research Institute, Ottawa, ON, Canada
- AGE-WELL SAM3 National Innovation Hub, Ottawa, ON, Canada
- Faculty of Engineering, Carleton University, Ottawa, ON, Canada
- Technology Assisted Friendly Environment for the Third Age, Ottawa, ON, Canada
| | - Hailey Lowden
- Bruyère Research Institute, Ottawa, ON, Canada
- Faculty of Engineering, Carleton University, Ottawa, ON, Canada
| | - Frank Knoefel
- Bruyère Research Institute, Ottawa, ON, Canada
- AGE-WELL SAM3 National Innovation Hub, Ottawa, ON, Canada
- Faculty of Engineering, Carleton University, Ottawa, ON, Canada
- Technology Assisted Friendly Environment for the Third Age, Ottawa, ON, Canada
- University of Ottawa, Ottawa, ON, Canada
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Abstract
INTRODUCTION Epidemiological data on dementia is not available in many European countries and regions due to the high cost and complexity of conducting large scale dementia screening studies. The available epidemiological studies identify potentially substantial variation in the prevalence of dementia over time and across Europe. METHODS In this paper we generate simulations of the number of dementia cases in Ireland from 1991 to 2036 using a three-state Markov illness-death model. Parameters values are selected for each simulation from a range using a random parameter search pattern. We employ a novel calibration method which exploits the strong relationship between dementia, ageing and mortality. Simulation weights are generated based on differences between observed and modelled cohorts of older people and the reported number of deaths from dementia. Irish Census data from 1991 to 2016 and the number of recorded deaths due to dementia in 2018 are used as calibration points. A weighted average projection of the number of dementia cases is generated. RESULTS We estimate a weighted average number of cases of dementia in 2016 of 54 877 increasing to 98 946 in 2036; this estimate is substantially lower than the estimates generated using extrapolation methods. We show the wide range of possible outcomes given the range in the available parameter estimates and show that irrespective of whether the incidence rate of dementia is declining the number of cases of dementia is rapidly increasing due to population ageing. CONCLUSION Previous studies have used parameter estimates from meta-analyses of the literature or from individual studies. In this paper we supplement these with a calibration approach using observed cause of death and population age structure data. These additional sources of data can be used to generate estimates of dementia prevalence in any country or region which has census data and data on deaths due to dementia.
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Affiliation(s)
- Tom Pierse
- Centre for Economic and Social Research on Dementia, National University of Ireland, Galway, Ireland
| | - Fiona Keogh
- Centre for Economic and Social Research on Dementia, National University of Ireland, Galway, Ireland
| | - Stephen O'Neill
- Department of Health Services Research and Policy, London School of Hygiene & Tropical Medicine, London, United Kingdom
- J.E. Cairnes School of Business and Economics, National University of Ireland, Galway, Ireland
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Botly LC, Lindsay MP, Mulvagh SL, Hill MD, Goia C, Martin-Rhee M, Casaubon LK, Yip CY. Recent Trends in Hospitalizations for Cardiovascular Disease, Stroke, and Vascular Cognitive Impairment in Canada. Can J Cardiol 2020; 36:1081-1090. [DOI: 10.1016/j.cjca.2020.03.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2020] [Revised: 02/27/2020] [Accepted: 03/01/2020] [Indexed: 10/23/2022] Open
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Amankwah N, Oskoui M, Garner R, Bancej C, Manuel DG, Wall R, Finès P, Bernier J, Tu K, Reimer K. Cerebral palsy in Canada, 2011-2031: results of a microsimulation modelling study of epidemiological and cost impacts. Health Promot Chronic Dis Prev Can 2020; 40:25-37. [PMID: 32049464 PMCID: PMC7053851 DOI: 10.24095/hpcdp.40.2.01] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2024]
Abstract
INTRODUCTION The objective of our study was to present model-based estimates and projections on current and future health and economic impacts of cerebral palsy in Canada over a 20-year time horizon (2011-2031). METHODS We used Statistics Canada's Population Health Model (POHEM)-Neurological to simulate individuals' disease states, risk factors and health determinants and to describe and project health outcomes, including disease incidence, prevalence, life expectancy, health-adjusted life expectancy, health-related quality of life and health care costs over the life cycle of Canadians. Cerebral palsy cases were identified from British Columbia's health administrative data sources. A population-based cohort was then used to generate the incidence and mortality rates, enabling the projection of future incidence and mortality rates. A utility-based measure (Health Utilities Index Mark 3) was also included in the model to reflect various states of functional health to allow projections of health-related quality of life. Finally, we estimated caregiving parameters and health care costs from Canadian national surveys and health administrative data and included them as model parameters to assess the health and economic impact of cerebral palsy. RESULTS Although the overall crude incidence rate of cerebral palsy is projected to remain stable, newly diagnosed cases of cerebral palsy will rise from approximately 1800 in 2011 to nearly 2200 in 2031. In addition, the number of people with the condition is expected to increase from more than 75 000 in 2011 to more than 94 000 in 2031. Direct health care costs in constant 2010 Canadian dollars were about $11 700 for children with cerebral palsy aged 1-4 years versus about $600 for those without the condition. In addition, people with cerebral palsy tend to have longer periods in poorer health-related quality of life. CONCLUSION Individuals with cerebral palsy will continue to face challenges related to an ongoing need for specialized medical care and a rising need for supportive services. Our study offers important insights into future costs and impacts associated with cerebral palsy and provides valuable information that could be used to develop targeted health programs and strategies for Canadians living with this condition.
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Affiliation(s)
- Nana Amankwah
- Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Maryam Oskoui
- Departments of Pediatrics and Neurology Neurosurgery, McGill University, Montréal, Quebec, Canada
- Division of Pediatric Neurology, Montréal Children's Hospital, McGill University Health Centre, Montréal, Quebec, Canada
- Department of Epidemiology Biostatistics and Occupational Health, McGill University, Montréal, Quebec, Canada
| | - Rochelle Garner
- Health Analysis Division, Statistics Canada, Ottawa, Ontario, Canada
| | | | - Douglas G Manuel
- Health Analysis Division, Statistics Canada, Ottawa, Ontario, Canada
- Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
- University of Ottawa, Ottawa, Ontario, Canada
- Bruyère Research Institute, Ottawa, Ontario, Canada
- School of Public and Population Health, University of Ottawa, Ottawa, Ontario, Canada
- Institute for Clinical Evaluative Sciences, Ottawa, Ontario, Canada
- North York General Hospital, Toronto, Ontario, Canada
| | - Ron Wall
- Public Health Agency of Canada, Ottawa, Ontario, Canada
| | - Philippe Finès
- Health Analysis Division, Statistics Canada, Ottawa, Ontario, Canada
| | - Julie Bernier
- Health Analysis Division, Statistics Canada, Ottawa, Ontario, Canada
| | - Karen Tu
- North York General Hospital, Toronto, Ontario, Canada
- Department of Family and Community Medicine, Department of Medicine and Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
- Toronto Western Hospital Family Health Team, University Health Network, Toronto, Ontario, Canada
| | - Kim Reimer
- Population Health Surveillance and Epidemiology, Office of the Provincial Health Officer, British Columbia Ministry of Health, Victoria, British Columbia, Canada
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Laditka SB, Laditka JN, Jagger C. Microsimulation of Health Expectancies, Life Course Health, and Health Policy Outcomes. INTERNATIONAL HANDBOOK OF HEALTH EXPECTANCIES 2020. [DOI: 10.1007/978-3-030-37668-0_9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Prato FS, Pavlosky WF, Foster SC, Thiessen JD, Beaujot RP. Screening for Dementia Caused by Modifiable Lifestyle Choices Using Hybrid PET/MRI. J Alzheimers Dis Rep 2019; 3:31-45. [PMID: 30842996 PMCID: PMC6400112 DOI: 10.3233/adr-180098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/19/2018] [Indexed: 12/19/2022] Open
Abstract
Significant advances in positron emission tomography (PET) and magnetic resonance imaging (MRI) brain imaging in the early detection of dementia indicate that hybrid PET/MRI would be an effective tool to screen for dementia in the population living with lifestyle risk factors. Here we investigate the associated costs and benefits along with the needed imaging infrastructure. A demographic analysis determined the prevalence of dementia and its incidence. The expected value of the screening program was calculated assuming a sensitivity and specificity of 0.9, a prevalence of 0.1, a QALY factor of 0.348, a willingness to pay $114,000 CAD and the cost per PET/MRI scan of $2,000 CAD. It was assumed that each head PET/MRI could screen 3,000 individuals per year. The prevalence of dementia is increasing by almost two-fold every 20 years due to the increased population at ages where dementia is more prevalent. It has been shown that a five-year delay in the incidence of dementia would decrease the prevalence by some 45%. In Canada, a five-year delay corresponds to a health care savings of $27,000 CAD per subject per year. The expected value for screening was estimated at $23,745 CAD. The number of subjects to be screened per year in Canada, USA, and China between 60 and 79 was 11,405,000. The corresponding number of head-only hybrid PET/MRI systems needed is 3,800. A brain PET/MRI screening program is financially justifiable with respect to health care costs and justifies the continuing development of MRI compatible brain PET technology.
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Affiliation(s)
- Frank S. Prato
- Department of Medical Biophysics, Western University, London, ON, Canada
- Lawson Health Research Institute, London, ON, Canada
- Department of Medical Imaging, Western University, London, ON, Canada
| | - William F. Pavlosky
- Lawson Health Research Institute, London, ON, Canada
- Department of Medical Imaging, Western University, London, ON, Canada
| | | | - Jonathan D. Thiessen
- Department of Medical Biophysics, Western University, London, ON, Canada
- Lawson Health Research Institute, London, ON, Canada
- Department of Medical Imaging, Western University, London, ON, Canada
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Grossberg GT, Tong G, Burke AD, Tariot PN. Present Algorithms and Future Treatments for Alzheimer's Disease. J Alzheimers Dis 2019; 67:1157-1171. [PMID: 30741683 PMCID: PMC6484274 DOI: 10.3233/jad-180903] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/21/2018] [Indexed: 12/13/2022]
Abstract
An estimated 47 million people live with Alzheimer's disease (AD) and other forms of dementia worldwide. Although no disease-modifying treatments are currently available for AD, earlier diagnosis and proper management of the disease could have considerable impact on patient and caregiver quality of life and functioning. Drugs currently approved for AD treat the cognitive, behavioral, and functional symptoms of the disease and consist of three cholinesterase inhibitors (ChEIs) and the N-methyl-D-aspartate receptor antagonist memantine. Treatment of patients with mild to moderate AD is generally initiated with a ChEI. Patients who show progression of symptoms while on ChEI monotherapy may be switched to another ChEI and/or memantine can be added to the treatment regimen. In recent years, putative disease-modifying therapies have emerged that aim to slow the progression of AD instead of only addressing its symptoms. However, many therapies have failed in clinical trials in patients with established AD, suggesting that, once developed, disease-modifying agents may need to be deployed earlier in the course of illness. The goal of this narrative literature review is to discuss present treatment algorithms and potential future therapies in AD.
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Lee L, Slonim K, Hillier LM, Lu SK, Lee J. Persons with dementia and care partners’ perspectives on memory clinics in primary care. Neurodegener Dis Manag 2018; 8:385-397. [DOI: 10.2217/nmt-2018-0024] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Aims: To understand persons with dementia (PWD) and care partners’ experiences with the Primary Care Collaborative Memory Clinic (PCCMC) care model. Methods: Interviews were conducted with a purposeful sample of PWD (n = 12) and care partners (N = 16) to identify their perspectives of care received in the clinic and suggestions for improvement. Results: PWD and care partners were satisfied with care received within the PCCMC, had positive interactions with and perceived a strong sense of support from team members and felt listened to; the necessity of cognitive testing was recognized but disliked. Conclusions: The PCCMC care model can address many existing gaps in dementia care as experienced by PWD and care partners.
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Affiliation(s)
- Linda Lee
- Centre for Family Medicine Family Health Team, McMaster University, 10 B Victoria Street South, Kitchener, N2G 1C5 Ontario, Canada
- Department of Family Medicine, Faculty of Medicine, McMaster University, 100 Main St W, Hamilton, L8P 1H6 Ontario, Canada
| | - Karen Slonim
- Centre for Family Medicine Family Health Team, McMaster University, 10 B Victoria Street South, Kitchener, N2G 1C5 Ontario, Canada
| | - Loretta M Hillier
- Geriatric Education & Research in Aging Sciences (GERAS) Centre, St. Peter's Hospital, 88 Maplewood Ave, Hamilton, L8M 1W9 Ontario, Canada
| | - Stephanie K Lu
- Centre for Family Medicine Family Health Team, McMaster University, 10 B Victoria Street South, Kitchener, N2G 1C5 Ontario, Canada
| | - Jennifer Lee
- Centre for Family Medicine Family Health Team, McMaster University, 10 B Victoria Street South, Kitchener, N2G 1C5 Ontario, Canada
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Understanding the educational and support needs of informal care-givers of people with dementia attending an outpatient geriatric assessment clinic. AGEING & SOCIETY 2018. [DOI: 10.1017/s0144686x18000971] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
AbstractInformal (unpaid) care-givers of older people with dementia experience stress and isolation, causing physical and psychiatric morbidity. Comprehensive geriatric assessment clinics represent an important geriatrician-led model of dementia care. Our qualitative study examined the educational and support needs of care-givers of people diagnosed with dementia at a geriatric assessment clinic, resources used to address those needs and challenges experienced in doing so. We conducted structured thematic analysis of interviews with 18 informal care-givers. Participants’ narratives reflected four themes. First, care-givers sought information from varied sources, including the Alzheimer Society, the internet and clinic staff. Responsive behaviours, the expected progression of dementia and system navigation were topics of particular interest. Second, care-givers obtained assistance from public, for-profit and voluntary sources. Third, care-givers received little assistance. Two-thirds received fewer than four hours of help weekly from all sources combined, and none more than 15. Several received no assistance whatsoever. Publicly funded support workers’ tasks, and their timing, were often unhelpful. Finally, while numerous care-givers felt physical and emotional strain, and worried about how poor health impaired their care-giving, many hesitated to seek help. The needs of this unique population of informal care-givers can be met by improved home-care service flexibility, and access to trustworthy information about the expected progression of dementia and skills for managing behavioural and psychological symptoms.
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Silverman JM, Gibbs E, Peng X, Martens KM, Balducci C, Wang J, Yousefi M, Cowan CM, Lamour G, Louadi S, Ban Y, Robert J, Stukas S, Forloni G, Hsiung GYR, Plotkin SS, Wellington CL, Cashman NR. A Rational Structured Epitope Defines a Distinct Subclass of Toxic Amyloid-beta Oligomers. ACS Chem Neurosci 2018; 9:1591-1606. [PMID: 29614860 DOI: 10.1021/acschemneuro.7b00469] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
Abstract
Oligomers of amyloid-β (AβO) are deemed key in synaptotoxicity and amyloid seeding of Alzheimer's disease (AD). However, the heterogeneous and dynamic nature of AβO and inadequate markers for AβO subtypes have stymied effective AβO identification and therapeutic targeting in vivo. We identified an AβO-subclass epitope defined by differential solvent orientation of the lysine 28 side chain in a constrained loop of serine-asparagine-lysine (cSNK), rarely displayed in molecular dynamics simulations of monomer and fibril ensembles. A mouse monoclonal antibody targeting AβOcSNK recognizes ∼50-60 kDa SDS-resistant soluble Aβ assemblages in AD brain and prolongs the lag phase of Aβ aggregation in vitro. Acute peripheral infusion of a murine IgG1 anti-AβOcSNK in two AD mouse models reduced soluble brain Aβ aggregates by 20-30%. Chronic cSNK peptide immunization of APP/PS1 mice engendered an anti-AβOcSNK IgG1 response without epitope spreading to Aβ monomers or fibrils and was accompanied by preservation of global PSD95 expression and improved cued fear memory. Our data indicate that the oligomer subtype AβOcSNK participates in synaptotoxicity and propagation of Aβ aggregation in vitro and in vivo.
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Affiliation(s)
- Judith M. Silverman
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Ebrima Gibbs
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Xubiao Peng
- Department of Physics and Astronomy, Genome Sciences and Technology Program, Bioinformatics, Institute for Applied Math, University of British Columbia, Room
311, 6356 Agricultural Road, Vancouver, BC V6T 1Z2, Canada
| | - Kris M. Martens
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Claudia Balducci
- IRCCS, Department of Neuroscience, Mario Negri Institute for Pharmacological Research, Via La Masa, 19, 20156 Milano, Italy
| | - Jing Wang
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Masoud Yousefi
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Catherine M. Cowan
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Guillaume Lamour
- Chemistry Department, University of British Columbia, Rm D223, 2036 Main Mall, Vancouver, BC V6T 1Z1, Canada
| | - Sarah Louadi
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Yuxin Ban
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
| | - Jerome Robert
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Sophie Stukas
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Gianluigi Forloni
- IRCCS, Department of Neuroscience, Mario Negri Institute for Pharmacological Research, Via La Masa, 19, 20156 Milano, Italy
| | - Ging-Yuek R. Hsiung
- UBC Hospital Clinic for Alzheimer Disease and Related Disorders, Department of Medicine, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Steven S. Plotkin
- Department of Physics and Astronomy, Genome Sciences and Technology Program, Bioinformatics, Institute for Applied Math, University of British Columbia, Room
311, 6356 Agricultural Road, Vancouver, BC V6T 1Z2, Canada
| | - Cheryl L. Wellington
- Department of Pathology and Laboratory Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2215 Wesbrook Mall, Vancouver, BC V6T 1Z3, Canada
| | - Neil R. Cashman
- Department of Medicine, Djavad Mowafaghian Centre for Brain Health, University of British Columbia, 2211 Wesbrook Mall, Vancouver, BC V6T 2B5, Canada
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Knoefel F, Wallace B, Goubran R, Marshall S. Naturalistic Driving: A Framework and Advances in Using Big Data. Geriatrics (Basel) 2018; 3:geriatrics3020016. [PMID: 31011060 PMCID: PMC6319207 DOI: 10.3390/geriatrics3020016] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/22/2018] [Accepted: 03/24/2018] [Indexed: 11/16/2022] Open
Abstract
Driving is an activity that facilitates physical, cognitive, and social stimulation in older adults, ultimately leading to better physical and cognitive health. However, aging is associated with declines in vision, physical health, and cognitive health, all of which can affect driving ability. One way of assessing driving ability is with the use of sensors in the older adult’s own vehicle. This paper provides a framework for driving assessment and addresses how naturalistic driving studies can assist in such assessments. The framework includes driving characteristics (how much driving, speed, position, type of road), actions and reactions (lane changes, intersections, passing, merging, traffic lights, pedestrians, other vehicles), destinations (variety and distance, sequencing and route planning), and driving conditions (time of day and season). Data from a subset of Ottawa drivers from the Candrive study is used to illustrate the use of naturalistic driving data. Challenges in using naturalistic driving big data and the changing technology in vehicles are discussed.
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Affiliation(s)
- Frank Knoefel
- Bruyère Continuing Care, Ottawa, ON K1N 5C8, Canada.
- Bruyère Research Institute, Ottawa, ON K1N 5C8, Canada.
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8L6, Canada.
- Department of Systems and Computer Engineering, Faculty of Engineering and Design, Carleton University, Ottawa, ON K1S 5B6, Canada.
- AGE-WELL NIH-SAM3, Ottawa, ON K1N 5C8, Canada.
| | - Bruce Wallace
- Bruyère Research Institute, Ottawa, ON K1N 5C8, Canada.
- Department of Systems and Computer Engineering, Faculty of Engineering and Design, Carleton University, Ottawa, ON K1S 5B6, Canada.
- AGE-WELL NIH-SAM3, Ottawa, ON K1N 5C8, Canada.
| | - Rafik Goubran
- Bruyère Research Institute, Ottawa, ON K1N 5C8, Canada.
- Department of Systems and Computer Engineering, Faculty of Engineering and Design, Carleton University, Ottawa, ON K1S 5B6, Canada.
- AGE-WELL NIH-SAM3, Ottawa, ON K1N 5C8, Canada.
| | - Shawn Marshall
- Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8L6, Canada.
- Ottawa Health Research Institute, The Ottawa Hospital, Ottawa, ON K1Y 4E9, Canada.
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DeForge R, Ward-Griffin C, St-Amant O, Hall J, McWilliam C, Forbes D, Kloseck M, Oudshoorn A. Evaluating dementia home care practices: The reification of care norms. J Aging Stud 2017; 43:23-31. [PMID: 29173511 DOI: 10.1016/j.jaging.2017.09.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2017] [Revised: 06/28/2017] [Accepted: 09/01/2017] [Indexed: 11/29/2022]
Abstract
This critical ethnographic study examined how power relations shape the nature and enactment of caregivers' evaluation of home-based dementia care practices. As the home care sector continues to evolve and prepare itself as a key element in caring for people living with dementia and their families, this study grounds our understanding of how dementia home care practices are enacted and evaluated, particularly at the interface of formal and familial caregiving. The critical finding from our data is that not all evaluations of care practices were considered equally meaningful or relevant, and, moreover, their significance depended on whether the evaluation was made by someone in a position of power. Renewed awareness of and attention to power relations, such as class and gender, are implicated in the evaluation of care practices. Consequently, challenging how power is enacted in ways that (re)produces and reifies care norms is vital in order to foster equitable and supportive partnerships in home-based dementia care.
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Affiliation(s)
- Ryan DeForge
- Health & Rehabilitation Sciences, Western University, London, Canada.
| | - Catherine Ward-Griffin
- Arthur Labatt Family School of Nursing, Faculty of Health Sciences, Western University, London, Canada
| | - Oona St-Amant
- Daphne Cockwell School of Nursing, Ryerson University, Toronto, Canada
| | - Jodi Hall
- School of Nursing, Faculty of Health Sciences, Nursing, Human Services, Fanshawe College, London, Canada
| | - Carol McWilliam
- Arthur Labatt Family School of Nursing, Faculty of Health Sciences, Western University, London, Canada
| | - Dorothy Forbes
- Faculty of Nursing, University of Alberta, Edmonton, Canada
| | - Marita Kloseck
- School of Health Studies, Faculty of Health Sciences, Western University, London, Canada
| | - Abe Oudshoorn
- Arthur Labatt Family School of Nursing, Faculty of Health Sciences, Western University, London, Canada
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