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PLoS Medicine

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https://www.readbyqxmd.com/read/28323832/age-related-cognitive-decline-and-associations-with-sex-education-and-apolipoprotein-e-genotype-across-ethnocultural-groups-and-geographic-regions-a-collaborative-cohort-study
#1
Darren M Lipnicki, John D Crawford, Rajib Dutta, Anbupalam Thalamuthu, Nicole A Kochan, Gavin Andrews, M Fernanda Lima-Costa, Erico Castro-Costa, Carol Brayne, Fiona E Matthews, Blossom C M Stephan, Richard B Lipton, Mindy J Katz, Karen Ritchie, Jacqueline Scali, Marie-Laure Ancelin, Nikolaos Scarmeas, Mary Yannakoulia, Efthimios Dardiotis, Linda C W Lam, Candy H Y Wong, Ada W T Fung, Antonio Guaita, Roberta Vaccaro, Annalisa Davin, Ki Woong Kim, Ji Won Han, Tae Hui Kim, Kaarin J Anstey, Nicolas Cherbuin, Peter Butterworth, Marcia Scazufca, Shuzo Kumagai, Sanmei Chen, Kenji Narazaki, Tze Pin Ng, Qi Gao, Simone Reppermund, Henry Brodaty, Antonio Lobo, Raúl Lopez-Anton, Javier Santabárbara, Perminder S Sachdev
BACKGROUND: The prevalence of dementia varies around the world, potentially contributed to by international differences in rates of age-related cognitive decline. Our primary goal was to investigate how rates of age-related decline in cognitive test performance varied among international cohort studies of cognitive aging. We also determined the extent to which sex, educational attainment, and apolipoprotein E ε4 allele (APOE*4) carrier status were associated with decline. METHODS AND FINDINGS: We harmonized longitudinal data for 14 cohorts from 12 countries (Australia, Brazil, France, Greece, Hong Kong, Italy, Japan, Singapore, Spain, South Korea, United Kingdom, United States), for a total of 42,170 individuals aged 54-105 y (42% male), including 3...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323831/genetic-assessment-of-age-associated-alzheimer-disease-risk-development-and-validation-of-a-polygenic-hazard-score
#2
Rahul S Desikan, Chun Chieh Fan, Yunpeng Wang, Andrew J Schork, Howard J Cabral, L Adrienne Cupples, Wesley K Thompson, Lilah Besser, Walter A Kukull, Dominic Holland, Chi-Hua Chen, James B Brewer, David S Karow, Karolina Kauppi, Aree Witoelar, Celeste M Karch, Luke W Bonham, Jennifer S Yokoyama, Howard J Rosen, Bruce L Miller, William P Dillon, David M Wilson, Christopher P Hess, Margaret Pericak-Vance, Jonathan L Haines, Lindsay A Farrer, Richard Mayeux, John Hardy, Alison M Goate, Bradley T Hyman, Gerard D Schellenberg, Linda K McEvoy, Ole A Andreassen, Anders M Dale
BACKGROUND: Identifying individuals at risk for developing Alzheimer disease (AD) is of utmost importance. Although genetic studies have identified AD-associated SNPs in APOE and other genes, genetic information has not been integrated into an epidemiological framework for risk prediction. METHODS AND FINDINGS: Using genotype data from 17,008 AD cases and 37,154 controls from the International Genomics of Alzheimer's Project (IGAP Stage 1), we identified AD-associated SNPs (at p < 10-5)...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323829/potentially-modifiable-lifestyle-factors-cognitive-reserve-and-cognitive-function-in-later-life-a-cross-sectional-study
#3
Linda Clare, Yu-Tzu Wu, Julia C Teale, Catherine MacLeod, Fiona Matthews, Carol Brayne, Bob Woods
BACKGROUND: Potentially modifiable lifestyle factors may influence cognitive health in later life and offer potential to reduce the risk of cognitive decline and dementia. The concept of cognitive reserve has been proposed as a mechanism to explain individual differences in rates of cognitive decline, but its potential role as a mediating pathway has seldom been explored using data from large epidemiological studies. We explored the mediating effect of cognitive reserve on the cross-sectional association between lifestyle factors and cognitive function in later life using data from a population-based cohort of healthy older people...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323827/dementia-in-the-oldest-old-beyond-alzheimer-disease
#4
Aimee L Pierce, Claudia H Kawas
In a Perspective, Aimee Pierce and Claudia Kawas discuss risk factors and pathologies of dementia in the oldest-old.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323826/apoe-related-risk-of-mild-cognitive-impairment-and-dementia-for-prevention-trials-an-analysis-of-four-cohorts
#5
Jing Qian, Frank J Wolters, Alexa Beiser, Mary Haan, M Arfan Ikram, Jason Karlawish, Jessica B Langbaum, John M Neuhaus, Eric M Reiman, J Scott Roberts, Sudha Seshadri, Pierre N Tariot, Beth McCarty Woods, Rebecca A Betensky, Deborah Blacker
BACKGROUND: With the onset of prevention trials for individuals at high risk for Alzheimer disease, there is increasing need for accurate risk prediction to inform study design and enrollment, but available risk estimates are limited. We developed risk estimates for the incidence of mild cognitive impairment (MCI) or dementia among cognitively unimpaired individuals by APOE-e4 dose for the genetic disclosure process of the Alzheimer's Prevention Initiative Generation Study, a prevention trial in cognitively unimpaired APOE-e4/e4 homozygote individuals...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323825/association-between-fatty-acid-metabolism-in-the-brain-and-alzheimer-disease-neuropathology-and-cognitive-performance-a-nontargeted-metabolomic-study
#6
Stuart G Snowden, Amera A Ebshiana, Abdul Hye, Yang An, Olga Pletnikova, Richard O'Brien, John Troncoso, Cristina Legido-Quigley, Madhav Thambisetty
BACKGROUND: The metabolic basis of Alzheimer disease (AD) pathology and expression of AD symptoms is poorly understood. Omega-3 and -6 fatty acids have previously been linked to both protective and pathogenic effects in AD. However, to date little is known about how the abundance of these species is affected by differing levels of disease pathology in the brain. METHODS AND FINDINGS: We performed metabolic profiling on brain tissue samples from 43 individuals ranging in age from 57 to 95 y old who were stratified into three groups: AD (N = 14), controls (N = 14) and "asymptomatic Alzheimer's disease" (ASYMAD), i...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28323819/development-of-an-adaptive-personalized-and-scalable-dementia-care-program-early-findings-from-the-care-ecosystem
#7
Katherine L Possin, Jennifer Merrilees, Stephen J Bonasera, Alissa Bernstein, Winston Chiong, Kirby Lee, Leslie Wilson, Sarah M Hooper, Sarah Dulaney, Tamara Braley, Sutep Laohavanich, Julie E Feuer, Amy M Clark, Michael W Schaffer, A Katrin Schenk, Julia Heunis, Paulina Ong, Kristen M Cook, Angela D Bowhay, Rosalie Gearhart, Anna Chodos, Georges Naasan, Andrew B Bindman, Daniel Dohan, Christine Ritchie, Bruce L Miller
Katherine Possin and colleagues report on the implementation, development, and early findings of the Care Ecosystem, an adaptive, personalized, and scalable dementia care program.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28319130/plos-medicine-2016-reviewer-and-editorial-board-thank-you
#8
EDITORIAL
(no author information available yet)
No abstract text is available yet for this article.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28291818/challenges-and-opportunities-in-understanding-dementia-and-delirium-in-the-acute-hospital
#9
Thomas A Jackson, John R F Gladman, Rowan H Harwood, Alasdair M J MacLullich, Elizabeth L Sampson, Bart Sheehan, Daniel H J Davis
In an Essay, Andrew Jackson and colleagues discuss challenges in the diagnosis and management of older people with dementia and delirium in acute hospitals.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28291801/early-diagnosis-of-mild-cognitive-impairment-and-mild-dementia-through-basic-and-instrumental-activities-of-daily-living-development-of-a-new-evaluation-tool
#10
Elise Cornelis, Ellen Gorus, Ingo Beyer, Ivan Bautmans, Patricia De Vriendt
BACKGROUND: Assessment of activities of daily living (ADL) is paramount to determine impairment in everyday functioning and to ensure accurate early diagnosis of neurocognitive disorders. Unfortunately, most common ADL tools are limited in their use in a diagnostic process. This study developed a new evaluation by adopting the items of the Katz Index (basic [b-] ADL) and Lawton Scale (instrumental [i-] ADL), defining them with the terminology of the International Classification of Human Functioning, Disability and Health (ICF), adding the scoring system of the ICF, and adding the possibility to identify underlying causes of limitations in ADL...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28291788/mixed-pathologies-and-neural-reserve-implications-of-complexity-for-alzheimer-disease-drug-discovery
#11
David A Bennett
In a Perspective, David Bennett makes a case for neural reserve to be considered as a therapeutic endpoint in clinical trials for dementia.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28291786/association-of-lifelong-exposure-to-cognitive-reserve-enhancing-factors-with-dementia-risk-a-community-based-cohort-study
#12
Hui-Xin Wang, Stuart W S MacDonald, Serhiy Dekhtyar, Laura Fratiglioni
BACKGROUND: Variation in the clinical manifestation of dementia has been associated with differences in cognitive reserve, although less is known about the cumulative effects of exposure to cognitive reserve factors over the life course. We examined the association of cognitive reserve-related factors over the lifespan with the risk of dementia in a community-based cohort of older adults. METHODS AND FINDINGS: Information on early-life education, socioeconomic status, work complexity at age 20, midlife occupation attainment, and late-life leisure activities was collected in a cohort of dementia-free community dwellers aged 75+ y residing in the Kungsholmen district of Stockholm, Sweden, in 1987-1989...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28291781/effectiveness-of-an-intervention-to-facilitate-prompt-referral-to-memory-clinics-in-the-united-kingdom-cluster-randomised-controlled-trial
#13
Gill Livingston, Gianluca Baio, Andrew Sommerlad, Simon de Lusignan, Spyridon Poulimenos, Steve Morris, Greta Rait, Juanita Hoe
BACKGROUND: Most people with dementia do not receive timely diagnosis, preventing them from making informed plans about their future and accessing services. Many countries have a policy to increase timely diagnosis, but trials aimed at changing general practitioner (GP) practice have been unsuccessful. We aimed to assess whether a GP's personal letter, with an evidence-based leaflet about overcoming barriers to accessing help for memory problems-aimed at empowering patients and families-increases timely dementia diagnosis and patient presentation to general practice...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28267802/multimorbidity-and-healthcare-utilization-among-home-care-clients-with-dementia-in-ontario-canada-a-retrospective-analysis-of-a-population-based-cohort
#14
Luke Mondor, Colleen J Maxwell, David B Hogan, Susan E Bronskill, Andrea Gruneir, Natasha E Lane, Walter P Wodchis
BACKGROUND: For community-dwelling older persons with dementia, the presence of multimorbidity can create complex clinical challenges for both individuals and their physicians, and can contribute to poor outcomes. We quantified the associations between level of multimorbidity (chronic disease burden) and risk of hospitalization and risk of emergency department (ED) visit in a home care cohort with dementia and explored the role of continuity of physician care (COC) in modifying these relationships...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28267788/dementia-incidence-trend-over-1992-2014-in-the-netherlands-analysis-of-primary-care-data
#15
Emma F van Bussel, Edo Richard, Derk L Arts, Astrid C J Nooyens, Preciosa M Coloma, Margot W M de Waal, Marjan van den Akker, Marion C J Biermans, Markus M J Nielen, Kees van Boven, Hugo Smeets, Fiona E Matthews, Carol Brayne, Wim B Busschers, Willem A van Gool, Eric P Moll van Charante
BACKGROUND: Recent reports have suggested declining age-specific incidence rates of dementia in high-income countries over time. Improved education and cardiovascular health in early age have been suggested to be bringing about this effect. The aim of this study was to estimate the age-specific dementia incidence trend in primary care records from a large population in the Netherlands. METHODS AND FINDINGS: A dynamic cohort representative of the Dutch population was composed using primary care records from general practice registration networks (GPRNs) across the country...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28267775/what-s-the-take-home-from-research-on-dementia-trends
#16
Eric B Larson, Kenneth M Langa
Eric Larson and Kenneth Langa discuss whether the risk of dementia is increasing or decreasing over time.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28267747/subjective-and-objective-cognitive-function-among-older-adults-with-a-history-of-traumatic-brain-injury-a-population-based-cohort-study
#17
Raquel C Gardner, Kenneth M Langa, Kristine Yaffe
BACKGROUND: Traumatic brain injury (TBI) is extremely common across the lifespan and is an established risk factor for dementia. The cognitive profile of the large and growing population of older adults with prior TBI who do not have a diagnosis of dementia, however, has not been well described. Our aim was to describe the cognitive profile associated with prior TBI exposure among community-dwelling older adults without dementia-an understudied but potentially vulnerable population. METHODS AND FINDINGS: In this population-based cohort study, we studied 984 community-dwelling older adults (age 51 y and older and their spouses) without dementia who had been randomly selected from respondents to the 2014 wave of the Health and Retirement Study to participate in a comprehensive TBI survey and who either reported no prior TBI (n = 737) or prior symptomatic TBI resulting in treatment in a hospital (n = 247)...
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28267744/rehabilitation-for-people-living-with-dementia-a-practical-framework-of-positive-support
#18
Linda Clare
In a Perspective, Linda Clare proposes using a cognitive rehabilitation approach for people living with dementia.
March 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28245280/serotonin-transporter-gene-slc6a4-polymorphism-and-susceptibility-to-a-home-visiting-maternal-infant-attachment-intervention-delivered-by-community-health-workers-in-south-africa-reanalysis-of-a-randomized-controlled-trial
#19
Barak Morgan, Robert Kumsta, Pasco Fearon, Dirk Moser, Sarah Skeen, Peter Cooper, Lynne Murray, Greg Moran, Mark Tomlinson
BACKGROUND: Clear recognition of the damaging effects of poverty on early childhood development has fueled an interest in interventions aimed at mitigating these harmful consequences. Psychosocial interventions aimed at alleviating the negative impacts of poverty on children are frequently shown to be of benefit, but effect sizes are typically small to moderate. However, averaging outcomes over an entire sample, as is typically done, could underestimate efficacy because weaker effects on less susceptible individuals would dilute estimation of effects on those more disposed to respond...
February 2017: PLoS Medicine
https://www.readbyqxmd.com/read/28245259/estimated-impact-on-birth-weight-of-scaling-up-intermittent-preventive-treatment-of-malaria-in-pregnancy-given-sulphadoxine-pyrimethamine-resistance-in-africa-a-mathematical-model
#20
Patrick G T Walker, Jessica Floyd, Feiko Ter Kuile, Matt Cairns
BACKGROUND: Malaria transmission has declined substantially in the 21st century, but pregnant women in areas of sustained transmission still require protection to prevent the adverse pregnancy and birth outcomes associated with malaria in pregnancy (MiP). A recent call to action has been issued to address the continuing low coverage of intermittent preventive treatment of malaria in pregnancy (IPTp). This call has, however, been questioned by some, in part due to concerns about resistance to sulphadoxine-pyrimethamine (SP), the only drug currently recommended for IPTp...
February 2017: PLoS Medicine
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