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- Vermunt, L., et al.
(författare)
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Duration of preclinical, prodromal, and dementia stages of Alzheimer's disease in relation to age, sex, and APOE genotype
- 2019
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Ingår i: Alzheimers & Dementia. - : Wiley. - 1552-5260 .- 1552-5279. ; 15:7, s. 888-898
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Tidskriftsartikel (refereegranskat)abstract
- Introduction: We estimated the age-specific duration of the preclinical, prodromal, and dementia stages of Alzheimer's disease (AD) and the influence of sex, setting, apolipoprotein E (APOE) genotype, and cerebrospinal fluid tau on disease duration. Methods: We performed multistate modeling in a combined sample of 6 cohorts (n = 3268) with death as the end stage and estimated the preclinical, prodromal, and dementia stage duration. Results: The overall AD duration varied between 24 years (age 60) and 15 years (age 80). For individuals presenting with preclinical AD, age 70, the estimated preclinical AD duration was 10 years, prodromal AD 4 years, and dementia 6 years. Male sex, clinical setting, APOE epsilon 4 allele carriership, and abnormal cerebrospinal fluid tau were associated with a shorter duration, and these effects depended on disease stage. Discussion: Estimates of AD disease duration become more accurate if age, sex, setting, APOE, and cerebrospinal fluid tau are taken into account. This will be relevant for clinical practice and trial design. (C) 2019 the Alzheimer's Association. Published by Elsevier Inc. All rights reserved.
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| 4. |
- Kiejna, A, et al.
(författare)
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Epidemiological studies of cognitive impairment and dementia across Eastern and Middle European countries (epidemiology of dementia in Eastern and Middle European Countries)
- 2011
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Ingår i: International Journal of Geriatric Psychiatry. - : Wiley. - 0885-6230 .- 1099-1166. ; 26:2, s. 111-117
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Tidskriftsartikel (refereegranskat)abstract
- Objective To determine the availability and the consistency of prevalence findings of epidemiological studies on cognitive impairment and dementia conducted in Eastern and Middle Europe.Methods We adopted a stepwise multimethod study approach consisting of iterative literature searches for epidemiological articles published between 1990 and 2006 and subsequent data analyses of published material, reanalyses of existing accessible epidemiological data sets and expert inquiries in Eastern and Middle European countries. Systematic computer-assisted searches used the keywords: "dementia", "Alzheimer", "cognitive impairment", "incidence", "prevalence", "epidemiology" in combination with the name of the relevant countries or "Europe" in English and Polish language. We supplemented the literature search with a review of the references in the articles that were identified during the initial search.Results We were able to find few regional and country-specific epidemiological studies of various kinds (population-based, cohort, cross-sectional studies) and conducted on different restricted population groups of patients (from neurological units, out-patients units, residential homes). No studies were identified from most of the countries taken under consideration and the ones we found were characterized by an immense diversity with a considerable degree of clinical and methodological variations. The few studies that there are suggest prevalence rates of dementia in Eastern Europe similar to those in Western Europe.Conclusions There is strong need for epidemiological studies in Eastern and Middle Europe, as well as for greater coordination and standardization of methods to improve the quality and comparability of epidemiological data to determine the prevalences' rates of dementia in all the EU countries.
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| 5. |
- Lambert, M. A., et al.
(författare)
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Estimating the burden of early onset dementia : systematic review of disease prevalence
- 2014
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Ingår i: European Journal of Neurology. - : John Wiley & Sons. - 1351-5101 .- 1468-1331. ; 21:4, s. 563-569
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Forskningsöversikt (refereegranskat)abstract
- Dementia is more common in older age but a number of people develop symptoms at a younger age and are said to have early onset dementia (EOD). Those with EOD face different challenges to those with onset later in life. It has been difficult to quantify this disease burden. This is a systematic review of papers reporting on the prevalence of EOD. A search of Medline and Embase was performed. This was followed by a hand search of the references of these papers. Eleven suitable studies were included. All of the data was from more economically developed countries. The studies were heterogeneous in their design hindering direct comparison. The majority of the papers looked at all types of dementia although many gave a breakdown of the prevalence of different subgroups. A variety of diagnostic criteria was employed. Figures of 38 to 260 per 100 000 are quoted by papers looking at various different types of dementia together with an onset of between 30 and 64 or up to 420 per 100 000 for those aged 55–64. Prevalence rises as age approaches 65. Epidemiological data for prevalence rates for EOD are sparse. EOD remains a rare condition with low case numbers. Assimilation and comparison of results from existing studies is difficult due to methodological heterogeneity. Cross-national standardization of methodology should be a priority for future research in this area.
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| 6. |
- Reynish, E, et al.
(författare)
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The ICTUS Study: A Prospective longitudinal observational study of 1,380 AD patients in Europe. Study design and baseline characteristics of the cohort
- 2007
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Ingår i: Neuroepidemiology. - : S. Karger AG. - 1423-0208 .- 0251-5350. ; 29:1-2, s. 29-38
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Tidskriftsartikel (refereegranskat)abstract
- The long-term objective of the ICTUS study is to identify milestones in Alzheimer’s disease (AD) progression and to develop a model to predict disease course in individual AD patients in Europe. The secondary objectives are to describe the patterns of prescribing, and the socioeconomic impact of AD in Europe. Between 2003 and 2005 1,380 patients with probable AD were recruited in specialised (secondary care) clinics in 12 European countries. Their mean age was 76 years and they had a mean of 8.0 ± (SD) 4.6 years of education. Thirty-five percent were male. The mean MMSE score was 20.4 ± (SD) 4.0. Forty-three percent had very mild dementia (CDR 0.5) and 44% had mild dementia (CDR 1). All patients completed baseline evaluation and biannual follow-up is ongoing. The goals of the current study are to describe the specific methods for recruitment in this crosscultural setting and the characteristics of the inception ICTUS cohort, including clinical features, co-morbidity, neuropsychological performance, neuropsychiatric symptoms, functional impairment and social burden.
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