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Riewpaiboon A, Van Minh H, Huong NT, Dung P, Wright EP. Burden of care for persons with disabilities in Vietnam. HEALTH & SOCIAL CARE IN THE COMMUNITY 2014; 22:660-671. [PMID: 25257047 DOI: 10.1111/hsc.12147] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 07/10/2014] [Indexed: 06/03/2023]
Abstract
Vietnam has more than 6 million persons with disabilities (PWD), or 7.8% of the population. To provide better services for them, it is important to investigate the care they currently receive, and to obtain evidence on the health outcomes from that care. This study aimed to estimate the quality of life and functional status of a group of PWD in Vietnam and the cost of care they receive. This was an analytical study exploring the time and cost of informal care, the cost of illness (prevalence-based, patient perspective), quality of life using EuroQoL and functional status using the Barthel Index. The sample was selected from urban and rural areas of Quang Tri province in Central Vietnam, using systematic random sampling. Data were collected by face-to-face interviews, and in a 1-month diary recorded during July-August 2010 for summer and in December 2010 for winter. The costs are presented in 2010 USD values. The data were analysed by descriptive, univariate and multivariate statistics to summarise and explore the relationships among dependent and independent variables. The study sample included 210 PWD, with an average age of 38 years and duration of disability on average 26 years. The health-related quality of life measured in terms of the health utility score (0 = death, 1 = full health) was on average 0.44 and 0.39 in summer and winter respectively. The total cost of illness per year per case was USD 971 (83% of gross domestic product per capita); explanatory variables were the age of the PWD, receiving community-based rehabilitation, receiving government support and the severity of the disability. This illustrates the importance of services and support for reduction of the economic burden on the family. In conclusion, the results of this study provide information on the burden caused by disabilities in rural and urban households in Vietnam.
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Affiliation(s)
- Arthorn Riewpaiboon
- Division of Social and Administrative Pharmacy, Department of Pharmacy, Faculty of Pharmacy, Mahidol University, Bangkok, Thailand
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Jones RW, Romeo R, Trigg R, Knapp M, Sato A, King D, Niecko T, Lacey L. Dependence in Alzheimer's disease and service use costs, quality of life, and caregiver burden: the DADE study. Alzheimers Dement 2014; 11:280-90. [PMID: 25074342 DOI: 10.1016/j.jalz.2014.03.001] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2013] [Revised: 12/24/2013] [Accepted: 03/06/2014] [Indexed: 01/16/2023]
Abstract
BACKGROUND Most models determining how patient and caregiver characteristics and costs change with Alzheimer's disease (AD) progression focus on one aspect, for example, cognition. AD is inadequately defined by a single domain; tracking progression by focusing on a single aspect may mean other important aspects are insufficiently addressed. Dependence has been proposed as a better marker for following disease progression. METHODS This was a cross-sectional observational study (18 UK sites). Two hundred forty-nine community or institutionalized patients, with possible/probable AD, Mini-Mental State Examination (3-26), and a knowledgeable informant participated. RESULTS Significant associations noted between dependence (Dependence Scale [DS]) and clinical measures of severity (cognition, function, and behavior). Bivariate and multivariate models demonstrated significant associations between DS and service use cost, patient quality of life, and caregiver perceived burden. CONCLUSION The construct of dependence may help to translate the combined impact of changes in cognition, function, and behavior into a more readily interpretable form. The DS is useful for assessing patients with AD in clinical trials/research.
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Affiliation(s)
- Roy W Jones
- RICE (The Research Institute for the Care of Older People), Royal United Hospital, Bath, UK.
| | - Renee Romeo
- Centre for the Economics of Mental and Physical Health, Institute of Psychiatry, King's College London, London, UK
| | - Richard Trigg
- School of Social Sciences, Nottingham Trent University, Nottingham, UK
| | - Martin Knapp
- Centre for the Economics of Mental and Physical Health, Institute of Psychiatry, King's College London, London, UK; LSE Health and Social Care, London School of Economics and Political Science, London, UK
| | - Azusa Sato
- LSE Health and Social Care, London School of Economics and Political Science, London, UK
| | - Derek King
- LSE Health and Social Care, London School of Economics and Political Science, London, UK
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Clinical and economic characteristics associated with direct costs of Alzheimer's, frontotemporal and vascular dementia in Argentina. Int Psychogeriatr 2011; 23:554-61. [PMID: 21044400 DOI: 10.1017/s1041610210002012] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND The economic cost of dementia is high and can be predicted by cognitive and neuropsychiatric profiles. The differential costs of the various subtypes of dementia are unknown in Argentina, and this study therefore aimed to compare these costs. METHODS Patients with a diagnosis of dementia of Alzheimer-type (DAT), frontotemporal dementia (FTD) and vascular dementia (VaD), and their primary caregivers, were evaluated between 2002 and 2008. RESULTS 104 patients with dementia (DAT = 44, FTD = 34, VaD = 26) were screened and matched by age and educational level with 29 healthy subjects. Demographic variables showed no significant differences among dementia patients. The annual direct costs were US$4625 for DAT, US$4924 for FTD, and US$5112 for VaD (p > 0.05 between groups). In the post hoc analysis VaD showed higher hospitalization costs than DAT (p < 0.001). VaD exhibited lower medication costs than FTD (p < 0.001). DAT exhibited higher anti-dementia drug costs; FTD had higher psychotropic costs. In the multivariate analysis, depression, activities of daily living, and caregiver burden were correlated with direct costs (r2 = 0.76). CONCLUSIONS The different dementia types have different costs. Overall, costs increased with the presence of behavioral symptoms, depression and functional impairment of activities of daily living.
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Mauskopf J, Racketa J, Sherrill E. Alzheimer's disease: the strength of association of costs with different measures of disease severity. J Nutr Health Aging 2010; 14:655-63. [PMID: 20922342 DOI: 10.1007/s12603-010-0312-6] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
OBJECTIVE To identify Alzheimer's disease (AD) severity measures for use in cost-effectiveness models that effectively capture the impact of AD on costs. METHODS A review of the literature and data abstraction from papers that present 1) mean AD costs (direct, indirect, or total) by disease severity, defined using measure of cognition, functional status, and behavior; and/or 2) the results of regression analyses that estimate the strength of the association between AD costs and disease severity. RESULTS All papers reviewed showed that mean total costs increase with disease severity regardless of severity-measurement method. The relative difference in mean total costs between patients with severe disease compared to those with moderate disease, or moderate disease compared to mild disease, was fairly consistent across studies, suggesting that any of the disease-severity measures may be used to broadly categorize patients by cost. However, when regression analysis included multiple disease-severity measures, independent associations with costs were noted for the different measures. Cognitive and functional status measures were consistently associated with direct costs, whereas functional status and behavioral measures were consistently associated with indirect costs and caregiver hours. CONCLUSIONS Either multidimensional disease-severity measures, or a single disease-severity measure, that capture the impact of cognition, functional status, and behavior on costs are needed for cost-effectiveness models.
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Affiliation(s)
- J Mauskopf
- RTI Health Solutions, 200 Park Offices Drive, Research Triangle Park, NC 27709, USA.
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Comas-Herrera A, Wittenberg R, Pickard L, Knapp M. Cognitive impairment in older people: future demand for long-term care services and the associated costs. Int J Geriatr Psychiatry 2007; 22:1037-45. [PMID: 17603823 DOI: 10.1002/gps.1830] [Citation(s) in RCA: 95] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Projections are presented of future numbers of older people with cognitive impairment (CI) in England, their demand for long-term care (LTC) services and future costs of their care. The sensitivity of the projections to factors that are likely to affect future LTC expenditure is explored. These factors include future numbers of older people, prevalence rates of CI, trends in household composition, informal care provision, care service patterns and unit costs. METHODS A macrosimulation (or cell-based) model was developed to produce the projections, building on an earlier PSSRU model. Base case assumptions are made about trends in key factors expected to impact on future LTC expenditure, and variant assumptions about the key factors are introduced to test for sensitivity. RESULTS Expenditure on LTC services for older people with CI is projected to rise from 0.60% of Gross Domestic Product (GDP) ( pound5.4 billion) in 2002 to 0.96% of GDP ( pound16.7 billion) in 2031, under base case assumptions. Under variant assumptions, the projection for 2031 ranges from 0.83% to 1.11% of GDP. These figures do not include the opportunity costs of informal care. CONCLUSIONS Sensitivity analysis shows that projected demand for LTC is sensitive to assumptions about the future numbers of older people and future prevalence rates of CI and functional disability. Projected expenditure is also sensitive to assumptions about future rises in the real unit costs of services.
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Affiliation(s)
- Adelina Comas-Herrera
- Personal Social Services Research Unit, London School of Economics and Political Science, UK.
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Nordberg G, Wimo A, Jönsson L, Kåreholt I, Sjölund BM, Lagergren M, von Strauss E. Time use and costs of institutionalised elderly persons with or without dementia: results from the Nordanstig cohort in the Kungsholmen Project--a population based study in Sweden. Int J Geriatr Psychiatry 2007; 22:639-48. [PMID: 17225239 DOI: 10.1002/gps.1724] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND The aging of the population has become a worldwide phenomenon. This leads to increased demand for services and with limited resources it is important to find a way to estimate how resources can be match to those with greatest need. AIMS To analyse time use and costs in institutional care in relation to different levels of cognitive and functional capacity for elderly persons. METHODS The population consisted of all institutionalised inhabitants, 75 + years, living in a rural community (n = 176). They were clinically examined by physicians and interviewed by nurses. Staff and informal care-giving time was examined with the RUD (Resource Utilization in Dementia) instrument. RESULTS Tobit regression analyses showed that having dementia increased the amount of ADL care time with 0.9 h when compared to those not having dementia, whereas each loss of an ADL function (0-6) added 0.6 h of ADL care time. Analysing the total care time use, the presence of dementia added more than 9 h, while each loss of one ADL function added 2.9 h. There were some informal care contributions, however with no correlation to severity in dependency. The estimated cost for institutional care increased with more than 85% for people being dependent in 5-6 ADL activities compared to persons with no functional dependency, and with 30% for persons with dementia compared to the non-demented. CONCLUSION There is a variation in time use in institutional settings due to differences in ADL dependency but also whether dementia is present or not. This variation has implications for costs of institutional care.
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Affiliation(s)
- Gunilla Nordberg
- Aging Research Center (ARC), Karolinska Institutet, Stockholm, Sweden.
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Jönsson L, Eriksdotter Jönhagen M, Kilander L, Soininen H, Hallikainen M, Waldemar G, Nygaard H, Andreasen N, Winblad B, Wimo A. Determinants of costs of care for patients with Alzheimer's disease. Int J Geriatr Psychiatry 2006; 21:449-59. [PMID: 16676288 DOI: 10.1002/gps.1489] [Citation(s) in RCA: 152] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
BACKGROUND Alzheimer's disease (AD), the most common cause of dementia, is a major cause of disability and care burden in the elderly. This study aims to estimate the costs of formal and informal care and identity determinants of care costs. MATERIALS AND METHODS Two hundred and seventy-two (AD) patients and their caregivers were recruited among patients attending regular visits at six memory clinic in Sweden, Denmark, Norway and Finland. Patients with a diagnosis of AD and with an identifiable primary caregiver were eligible for inclusion. Data was collected by questionnaires at baseline, and at scheduled follow-up visits after 6 months and again after 12 months. Cognitive function was assessed with the Mini Mental State Examination (MMSE) and behavioural disturbances were measured using a brief version of the neuropsychiatric inventory (NPI). RESULTS Total annual costs were on average 172,000 SEK, ranging from 60,700 SEK in mild dementia to 375,000 SEK in severe dementia. Costs for community care (special accommodation, home help, etc.) constituted about half of total costs of care and increase sharply with increasing cognitive impairment. Informal care costs, valued at the opportunity cost of the caregiver's time, make up about a third of total costs and also increased significantly with disease severity. Medical care costs (inpatient care, outpatient care, pharmaceuticals), on the other hand, were not significantly related to disease severity. Regression analysis confirmed a strong association between costs and cognitive function, between patients as well as within patients over time. There was also a significant influence on costs from behavioural disturbances. Sensitivity analysis showed that the method chosen to value informal care can have considerable impact on results. CONCLUSIONS Costs of care in patient with AD are high and related to dementia severity as well as presence of behavioural disturbances. The cost estimates presented have implications for future economic evaluation of treatments for Alzheimer's disease.
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Affiliation(s)
- Linus Jönsson
- Division of Geriatric Epidemiology, the Neurotec Department, Karolinska Institutet, Stockholm, Sweden.
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Green C, Picot J, Loveman E, Takeda A, Kirby J, Clegg A. Modelling the cost effectiveness of cholinesterase inhibitors in the management of mild to moderately severe Alzheimer's disease. PHARMACOECONOMICS 2005; 23:1271-82. [PMID: 16336020 DOI: 10.2165/00019053-200523120-00010] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
OBJECTIVE To estimate the cost effectiveness (from the UK NHS and personal social services perspective) of the cholinesterase inhibitors donepezil, rivastigmine and galantamine compared with usual care in the treatment of mild to moderately severe Alzheimer's disease. Patients had a mean age of 74 years, a mean disease duration of 1 year and a mean Alzheimer's disease assessment scale-cognitive subscale score of 24. METHODS A pharmacoeconomic model was used to predict long-term outcomes over a 5-year time horizon and to estimate the cost effectiveness of cholinesterase inhibitors for the management of Alzheimer's disease. The model structure is informed by a systematic review of the literature on the clinical and cost effectiveness of cholinesterase inhibitors and a review of the literature on the costs and outcomes associated with treatment for Alzheimer's disease. The main outcome measure used was the cost per quality-adjusted life-year (QALY) gained. All healthcare costs (excluding cholinesterase inhibitor costs) were indexed to pounds sterling (2003 values). Drug costs are 2005 values. Multivariate probabilistic sensitivity analysis and scenario analysis were undertaken to assess uncertainty in the results. RESULTS The clinical benefits on cognition from treatment with cholinesterase inhibitors resulted in an incremental cost per QALY gained ranging from 53,780 pounds sterling to 74,735 pounds sterling, over 5 years (vs usual care). Uncertainty analysis suggests that the probability of any of these treatments having an incremental cost per QALY of < 30,000 pounds sterling is < 21%. The key determinants of cost effectiveness were the effectiveness of treatment, the mean treatment cost and the cost savings associated with an expected delay in disease progression. CONCLUSIONS Results presented in this paper suggest that the use of cholinesterase inhibitors may not be a cost-effective use of NHS resources. Guidance from the National Institute for Health and Clinical Effectiveness (NICE) in the UK on their judgements surrounding the acceptability of technologies as an effective use of resources, indicates there would need to be special reasons for accepting cholinesterase inhibitors as a cost-effective use of NHS resources.
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Affiliation(s)
- Colin Green
- Southampton Health Technology Assessments Centre, Wessex Institute for Health Research and Development, University of Southampton, Southampton, UK.
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Feldman HH, Van Baelen B, Kavanagh SM, Torfs KEL. Cognition, Function, and Caregiving Time Patterns in Patients With Mild-to-Moderate Alzheimer Disease. Alzheimer Dis Assoc Disord 2005; 19:29-36. [PMID: 15764869 DOI: 10.1097/01.wad.0000157065.43282.bc] [Citation(s) in RCA: 69] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Placebo data were pooled from two 1-year, randomized, double-blind, placebo-controlled trials of sabeluzole in patients with mild-to-moderate Alzheimer disease (AD). Cognition was assessed using the Alzheimer's Disease Assessment Scale-cognitive subscale (ADAS-cog) and activities of daily living (ADL) with the Disability Assessment in Dementia (DAD). Time spent assisting with ADL was estimated according to the caregiver for each DAD domain in the 2 weeks before assessment. Progressive annual decline was seen on ADAS-cog (5.6 +/- 7.3 [mean +/- SD]) and DAD (-12.4 +/- 17.8), with greater decline in moderate patients (Mini-Mental State Examination [MMSE] < or =18) than mild patients (MMSE >18). An MMSE score of 16 appeared to be a key transition point at which most instrumental ADL were lost and major losses of basic ADL began to occur over the next 12 months. Caregivers spent, on average, 14 hours more assisting with ADL over 2 weeks at the end of 1 year. The proportion of care provided by paid caregivers increased relative to the time spent by informal caregivers. Patients with mild-to-moderate AD experience predictable annual decline in cognition and daily functioning, with measurably increased caregiver time. Small changes in ADAS-cog are nevertheless associated with a substantial measurable effect on the daily lives of both patients and caregivers.
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Affiliation(s)
- Howard H Feldman
- Division of Neurology and Clinic for Alzheimer's Disease and Related Disorders, University of British Columbia, Vancouver, BC, Canada.
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López-Pousa S, Garre-Olmo J, Turon-Estrada A, Hernández F, Expósito I, Lozano-Gallego M, Hernández-Ferrándiz M, Gelada-Batlle E, Pericot-Nierga I, Vilalta-Franch J. Análisis de los costes de la enfermedad de Alzheimer en función del deterioro cognitivo y funcional. Med Clin (Barc) 2004; 122:767-72. [PMID: 15207104 DOI: 10.1016/s0025-7753(04)74381-x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
BACKGROUND AND OBJECTIVE This study aims to identify the relationship between costs of medical and social attention in patients with dementia of Alzheimer disease (AD) type and clinical and sociodemographic data of patients and their caregivers. PATIENTS AND METHOD It was an analytic observational study in a cohort of patients diagnosed with Alzheimer's disease who received ambulatory attention. Information about the use of health-related resources was collected and costs were estimated from a societal perspective. Indirect costs were calculated using a replacement cost approach. Patients and caregivers were examined with the Mini-Mental State Examination (MMSE), the Rapid Disability Rating Scale (RDRS-2), the Neuropsychiatric Inventory (NPI), the Burden Interview (BI) and the Resource Utilization in Dementia (RUD). Patients were grouped taking into account the score obtained in the MMSE. RESULTS A cohort of 417 patients, mean age (SD) 75.2 (6.6) years, 71% females, was studied. Disease severity levels were distributed as follows: MMSE, 26% for MMSE > 19, 66% for MMSE = 19-11, and 8% for MMSE < 11. 69% of caregivers were women, with a mean age of 57.1 (15.8) years. The cost per patient and per month was estimated to be 419.3 Euro for MMSE > 19, 641.9 Euro for MMSE = 19-11, and 1150.6 Euro for MMSE < 11. CONCLUSIONS The societal cost of AD increases dramatically with increasing disease severity. Caregiver burden and sex as well as the marital status of patients are associated with the cost of the disease.
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Affiliation(s)
- Secundino López-Pousa
- Unidad de Valoración de la Memoria y las Demencias (UVaMiD), Hospital Santa Caterina, Girona, Spain.
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Ward A, Caro JJ, Getsios D, Ishak K, O'Brien J, Bullock R. Assessment of health economics in Alzheimer's disease (AHEAD): treatment with galantamine in the UK. Int J Geriatr Psychiatry 2003; 18:740-7. [PMID: 12891643 DOI: 10.1002/gps.919] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE To assess the long-term health and economic impact of treating mild to moderate Alzheimer's disease (AD) with galantamine (16 mg or 24 mg per day) compared to no cholinesterase therapy in the UK. METHODS The long-term costs and outcomes were assessed using a model developed from longitudinal data on a cohort of AD patients. The model predicts the time until patients require full-time care, defined as the consistent requirement for a significant amount of care and supervision each day. Efficacy data were obtained from three clinical trials comparing galantamine with placebo, forecasts were made for ten years. Costs were determined in 2001 British pounds and discounted at 6% per annum, while outcomes such as time to full-time care were discounted at 1.5%. RESULTS Without pharmacological treatment, patients are expected to incur costs of 28,134 British pounds over ten years, 70% of costs accrue from providing full-time care. Galantamine (16 mg per day) is predicted to reduce the duration of the full-time care state by 12%; approximately five patients need to be treated to avoid one year of full-time care. The ten-year incremental costs per month of full-time care avoided average pound 192 British pounds per patient and 8,693 British pounds per QALY. Savings (1380 British pounds) are predicted for patients who continue treatment beyond six months and whose cognitive function is maintained or improved. Comparable results were estimated for the 24 mg dose. CONCLUSION In addition to the clinical benefits associated with galantamine treatment, the savings predicted from delaying when full-time care is needed may offset the treatment costs.
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Affiliation(s)
- A Ward
- Caro Research Institute, Concord, MA 01742, USA
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Wolstenholme J, Fenn P, Gray A, Keene J, Jacoby R, Hope T. Estimating the relationship between disease progression and cost of care in dementia. Br J Psychiatry 2002; 181:36-42. [PMID: 12091261 DOI: 10.1192/bjp.181.1.36] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Previous studies have shown a positive relationship between disease severity and cost. AIMS To explore the factors affecting time to institutionalisation and estimate the relationship between the costs of care and disease progression. METHOD Retrospective analysis of a longitudinal data-set for a cohort of 100 patients diagnosed with Alzheimer's disease or vascular dementia. RESULTS Changes in both Mini-Mental State Examination (MMSE) and Barthel scores have independent and significant marginal effects on costs. Each one-point decline in the MMSE score is associated with a pound sterling 56 increase in the four-monthly costs, whereas each one-point fall in the Barthel index is associated with a pound sterling 586 increase in costs. CONCLUSIONS It may be inappropriate for economic models of disease progression in dementia to be based solely on measures of cognitive change. MMSE and the Barthel index are independent significant predictors of time to institutionalisation and cost of care, but changes in the Barthel index are particularly important in predicting costs outside institutional care.
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Affiliation(s)
- J Wolstenholme
- Health Economics Research Centre, University of Oxford, Headington, UK
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Current awareness in geriatric psychiatry. Int J Geriatr Psychiatry 2002; 17:494-501. [PMID: 11994944 DOI: 10.1002/gps.577] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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