BackgroundPain medication may have an impact on the quality of life (QoL) in persons with dementia, but may also influence care dependency and daily functioning. The aim of this study is to... Show moreBackgroundPain medication may have an impact on the quality of life (QoL) in persons with dementia, but may also influence care dependency and daily functioning. The aim of this study is to investigate the effect of regularly scheduled paracetamol on care dependency and daily functioning in persons with advanced dementia with low QoL living in long-term care facilities.MethodsThe Quality of life and Paracetamol In advanced Dementia (Q-PID) study was a (block) randomized double-blind placebo-controlled crossover trial with paracetamol and placebo across seventeen long-term care facilities across 9 care organizations in the western region of the Netherlands. Participants were >= 65 years, had advanced dementia (Global Deterioration Scale 5-7), and low QoL (QUALIDEM-6D score <= 70). Measurements were performed by nursing staff at the start and at the end of each treatment period of six weeks. Repeated linear mixed models were used to compute differences between randomization groups, with adjustment for period and order effects, and psychotropic use.ResultsNinety-five persons (mean age of 83.9 years, 57.4% female) were enrolled in the Q-PID study. The mean Care Dependency Scale total score was 37.8 (Standard Deviation [SD] 12.9) and the mean Katz-15 total score was 11.9 (SD 2.4). Repeated linear mixed models showed no difference in mean differences of care dependency (paracetamol - 1.0 [95% Confidence Interval (CI) -2.4-0.3], placebo + 0.1 [-1.3-1.5]), and daily functioning (paracetamol + 0.2 [95% CI -0.2-0.6], placebo + 0.1 [-0.3-0.4]).ConclusionsCompared to placebo, no effect of scheduled administration of paracetamol was found on care dependency and daily functioning in persons with advanced dementia with low QoL. Future research should focus on which specific items of care dependency need special attention to improve the care for persons with advanced dementia. A multi-domain approach is needed to enhance and/or maintain QoL of persons with advanced dementia.Trial registrationNetherlands Trial Register (NTR6766); http://www.trialregister.nl/trialreg/admin/rctview.asp?TC=6766; Trial registration date: 20/10/2017. Show less
With ageing populations, the prevalence of age-related disorders such as dementia is on the rise. As there is currently no curable treatment for dementia, the vascular component of dementia is... Show moreWith ageing populations, the prevalence of age-related disorders such as dementia is on the rise. As there is currently no curable treatment for dementia, the vascular component of dementia is increasingly recognised as a key modifiable cause. This thesis aims to investigate biological pathways between risk factors of cardiometabolic disease and cognitive function, in a population of older adults at increased risk of cardiovascular disease (CVD). We hypothesise that changes in physiological functioning caused by (sub)clinical CVD are possible mediators within the pathway leading to cognitive dysfunction. In the first part of this thesis, we studied electrocardiogram-based intervals and serum cardiac biomarkers (such as troponin) in relation to cognitive function. In the second part of this thesis, we studied the interplay of body mass index and serum leptin, loss of body weight and body weight variability, as well as metabolomics-based health scores in relation to cognitive function. We found that various cardiometabolic risk factors are associated with worse cognitive function. The results of this thesis strongly suggest that subclinical changes in cardiometabolic health may exist before cognitive dysfunction becomes apparent. Treating these cardiometabolic risk factors may be of benefit to future cognitive health. Show less
Tasseron-Dries, P.E.M.; Smaling, H.J.A.; Nakanishi, M.; Achterberg, W.P.; Steen, J.T. van der 2023
Objectives This study aimed to determine best practices for involving family caregivers in interventions aimed at preventing and reducing responsive behaviour stemming from unmet needs, including... Show moreObjectives This study aimed to determine best practices for involving family caregivers in interventions aimed at preventing and reducing responsive behaviour stemming from unmet needs, including pain.Design Scoping review, reported according to the Preferred Reporting Items for Systematic Reviews, Meta-Analyses extension for Scoping Reviews reporting guideline.Data sources PubMed, Embase, Emcare, Web of Science, COCHRANE Library, PsycINFO, Academic Search Premier and Cinahl searched up to 23 July 2023.Eligibility criteria Studies reporting on family involvement in interventions for nursing home residents with dementia were included.Data extraction and synthesis Two researchers independently extracted the data, followed by a content analysis.Results Of the 1486 records screened, 20 studies were included. Family caregivers were involved in interventions aimed at planning care, life review (eg, documentation of life experiences of their relative), and selecting activities for their relative. Family caregivers preferred an active role in developing optimal care for their relative. Drivers of success and barriers to family involvement centred around three themes: (1) communication between all involved; (2) prerequisites (organisational and other conditions) and (3) personal circumstances (family’s coping and skills).Conclusion Best practices for involving family caregivers in interventions aimed at addressing responsive behaviour in residents with dementia concerned those interventions in which family caregivers were given an important role in managing responsive behaviour. This means that, in order to achieve an active role of family caregivers in the whole care process, their needs must be taken into account. Show less
Persons with dementia may not always be able to set their own goals and expectations. When persons with dementia are no longer able to assess their own Quality of life (QoL), family, friends and... Show morePersons with dementia may not always be able to set their own goals and expectations. When persons with dementia are no longer able to assess their own Quality of life (QoL), family, friends and professional caregivers need to be their voice, as they are most familiar with their values, goals and needs. QoL in persons with advanced dementia is influenced by many factors, such as environment, background and psychological factors such as depression and agitation.The Q-PID study was a 13-week double-blind, randomised, placebo-controlled crossover trial that assessed the effect of paracetamol on QoL, discomfort, pain, neuropsychiatric symptoms, care dependency and daily functioning in 95 persons with moderate to advanced dementia living in long-term care facilities (LTCF).This thesis provides evidence that administration of paracetamol or placebo alone is not effective, i.e., no ‘panacea’, for improving QoL, discomfort, pain, neuropsychiatric symptoms, care dependency and dailyfunctioning in persons with advanced dementia living in LTCF. Personalizing interventions, collaborationbetween different health care workers and family/friends, and combining pharmacological and non-pharmacological interventions are important to maintain the best QoL possible, and we recognize that this will be challenging, but not impossible. Show less
Groot, B.; Hendrikx, A.; Bendien, E.; Woelders, S.; Kock, L. de; Abma, T. 2023
BackgroundAcademics aim to understand the experiences of people living with cognitive and/or language impairment in their search for epistemic justice. Methods that do not rely solely on verbal... Show moreBackgroundAcademics aim to understand the experiences of people living with cognitive and/or language impairment in their search for epistemic justice. Methods that do not rely solely on verbal information (e.g., interviews, focus groups) but also employ an attunement to the non-verbal - such as participant observation and creative methods, are seen as a suitable way to do justice to people's non-verbal interactions. However, in practice, researchers still experience ethical issues in everyday encounters with participants with cognitive and/or language impairment even when trying to address epistemic issues while employing such methods. This article aims to demonstrate 1) the importance of attending to the non-verbal in order to prevent epistemic injustice in research and 2) how a case-study approach and discussing ethical dilemmas with peers may help to unpack some of the ethical tensions that the researchers experience.Aim and methodsThis article focuses on ethical dilemmas the authors encountered during their research projects in the past. Three cases chosen by the authors illustrate these dilemmas. Dilemmas are presented as auto-ethnographical written accounts, which were discussed during ten retrospective dialogical sessions (60–90 min) organized by the research group consisting of six academic researchers.ResultsEthically sound research, in which older people living with cognitive and/or language impairment are engaged, entails much more than following procedures about informed consent, privacy, submitting a proposal to an ethics committee, and using suitable methods and techniques. Ethical issues in these studies relate to everyday situations in which researchers tried to do justice to the knowledge of people who have difficulties expressing themselves verbally, but were challenged by what they have initially experienced as ‘having it wrong,’ ‘not knowing,’ and ‘losing something in translation’ in their practice. Finally, we learned that the interactions the researchers encountered were complex. They had to constantly evaluate the appropriateness of their approach, balance rational and intuitive forms of interaction and interpretation, and consider ways of communicating the research findings.Discussion and conclusionApproximating epistemic justice in research with people with cognitive and/or language impairment requires extra effort in daily research routines. Sharing everyday ethical issues via case stories and reflecting on these issues encourages moral learning and brings new knowledge about the craftsmanship of researchers. Especially the collaborative and dialogical reflection helped the researchers to dig deeper and find words for intangible processes that often remain unaddressed. However, sharing stories about ethical issues requires mutual trust and safety because sharing and reflecting may bring discomfort, messiness, and uncertainty. Show less
Objectives: The benefit-risk ratio of many interventions remains unclear in older adults with dementia. Efforts for more representative trial inclusion are made; however, recruiting and... Show moreObjectives: The benefit-risk ratio of many interventions remains unclear in older adults with dementia. Efforts for more representative trial inclusion are made; however, recruiting and particularly gaining informed consent remains complex. For research participation, dementia compels the designation of a legal guardian (LG) to give proxy consent. To advance future trial development, we aimed to provide more insights into the factors that affect the proxy decision-making process in dementia research. Design: A qualitative analysis of semi-structured interviews about proxy decision-making on participation in dementia research. Setting and Participants: LGs of nursing home residents that gave (n = 19) and refrained from giving (n = 18) proxy consent for a clinical trial (the Danton study) in the Netherlands. Methods: Verbatim transcripts were thematically analyzed by using a preliminary deductive framework with room for induction of additional emerging themes, being an overall abductive approach. Based on that theme list, related factors of the decision-making process were grouped into overarching levels and merged into a step-by-step process. Results: When discussing proxy decision-making on the participation of an older adult with dementia in a clinical trial, LGs described interconnected factors on the level of the study and patient. Past experiences and attitudes of the LG influenced the weighing of these study- and patient-related factors, leading to a preliminary decision. Other proxies and treating health care professionals (HCPs) were named as important other stakeholders of the decision-making process. Conclusions and Implications: When giving proxy consent for research participation, LGs weigh study- and patient-related factors, leading to an initial benefit-risk evaluation. This weighing process is influenced by LG-related factors and can be modulated by other proxies or treating HCPs, leading to a definitive decision. Although insights into these underlying mechanisms could facilitate the proxy decision-making process for both LGs and researchers, treating HCPs could act as an independent party. (c) 2023 The Authors. Published by Elsevier Inc. on behalf of AMDA - The Society for Post-Acute and Long-Term Care Medicine. This is an open access article under the CC BY license (http:// creativecommons.org/licenses/by/4.0/). Show less
Visser, L.N.C.; Fruijtier, A.; Kunneman, M.; Schoonenboom, N.; Staekenborg, S.S.; Wind, H.A.; ... ; Filer, W.M. van der 2023
Objective: We investigated motivations of patients and care partners for their memory clinic visit, and whether these are expressed in consultations.Methods: We included data from 115 patients (age... Show moreObjective: We investigated motivations of patients and care partners for their memory clinic visit, and whether these are expressed in consultations.Methods: We included data from 115 patients (age 71 +/- 11, 49% Female) and their care partners (N = 93), who completed questionnaires after their first consultation with a clinician. Audio-recordings of these consultations were available from 105 patients. Motivations for visiting the clinic were content-coded as reported by patients in the questionnaire, and expressed by patients and care partners in consultations.Results: Most patients reported seeking a cause for symptoms (61%) or to confirm/exclude a (dementia) diagnosis (16%), yet 19% reported another motivation: (more) information, care access, or treatment/advice. In the first consultation, about half of patients (52%) and care partners (62%) did not express their motivation(s). When both expressed a motivation, these differed in about half of dyads. A quarter of patients (23%) expressed a different/complementary motivation in the consultation, then reported in the questionnaire.Conclusion: Motivations for visiting a memory clinic can be specific and multifaceted, yet are often not addressed during consultations. Practice implications: We should encourage clinicians, patients, and care partners to talk about motivations for visiting the memory clinic, as a starting point to personalize (diagnostic) care. Show less
The general aim of this thesis was to study the frequency, causes and consequences of pathologic brain aging specifically focusing on sub-clinical and clinical MRI manifestations of vascular (small... Show moreThe general aim of this thesis was to study the frequency, causes and consequences of pathologic brain aging specifically focusing on sub-clinical and clinical MRI manifestations of vascular (small vessel disease) and neurodegenerative (brain atrophy) disease. A second aim was to improve the accuracy of the tools to quantify brain tissue so to better reflect the imaging characteristics of older people. All data presented in this thesis are from the AGES-Reykjavik Study including 5764 elderly men and women. The data is based on cross-sectional and longitudinal assessments of the brain with MRI measures. Show less
Steen, J.T. van der; Leussen, C.A. van; Ballentine, J.; Gribben, L.; Reid, J.; Hasson, F.; ... ; McLaughlin, D. 2023
Much is known about palliative care needs of persons with dementia and their family. Less is known about how to successfully implement models that address those needs. We present specialist models... Show moreMuch is known about palliative care needs of persons with dementia and their family. Less is known about how to successfully implement models that address those needs. We present specialist models in the Netherlands (2017-2018) and Northern Ireland (2016-2017) contrasting its evaluations. From implementation failure in the Netherlands compared with successful implementation in Northern Ireland, we learn that recognizing roles and competencies among all involved is essential in developing effective partnership relationships. All of this is facilitated by referral before the end of life and offering various training programs and in-patient and out-patient services and therapies to show benefits early. Show less
AbstractIntroductionPeople with dementia from migrant and ethnic minority (MEM) groups often receive suboptimal care. Differences in perceptions, values and preferences, and linguistic barriers may... Show moreAbstractIntroductionPeople with dementia from migrant and ethnic minority (MEM) groups often receive suboptimal care. Differences in perceptions, values and preferences, and linguistic barriers may complicate communication between persons with dementia, their families and healthcare professionals. Metaphor analysis can provide unique insight into the lifeworld of people with dementia and their informal caregivers. This study identified the metaphors with which informal caregivers of persons with dementia from diverse cultural-linguistic backgrounds understand and discuss dementia.MethodsWe conducted 7 focus groups (n = 42) and 12 interviews (n = 13) with informal caregivers of persons with dementia living in the Netherlands from six different cultural backgrounds: Dutch, Chinese, Turkish, Moroccan, Surinamese, and Dutch-Antillean. Interviews, in the native tongue of participants, were analyzed for the presence of direct and indirect metaphor.ResultsThe results indicate a conspicuous lack of metaphor to reflect on the nature and experience of having dementia. Two typical conceptual metaphors in health communication (journey/war) are virtually absent in all MEM groups. Furthermore, results suggest a one-sided and negative outlook on dementia, with an emphasis on persons with dementia as ‘childlike’ or ‘crazy’.ConclusionOur results suggest a lack of extensively available sophisticated (metaphorical) language to consider daily life with persons with dementia. There is a clear need to address the stigma and lack of medical knowledge surrounding dementia in these MEM groups and to carry out more cross-linguistic and cross-cultural research to explore which metaphors aid understanding and lead to the empowerment and restoration of self-worth of people with dementia. Show less
Objectives: To investigate the association between clinical, demographic, and organizational factors and formal (health professionals) and informal (relatives) resource utilization in nursing home... Show moreObjectives: To investigate the association between clinical, demographic, and organizational factors and formal (health professionals) and informal (relatives) resource utilization in nursing home patients with and without dementia. Methods: Baseline data from the multicomponent cluster randomized control COSMOS trial including 33 Norwegian nursing homes and 723 residents with and without dementia. Nursing home staff (n = 117) participated as proxy raters to approximate formal and informal resource use in daily care. Measurements: The primary outcome was the Resource Utilization in Dementia - Formal Care scale to assess formal and informal care time in hours/month regarding basic activities of daily living (ADL), instrumental ADL, and supervision. Secondary outcomes were hours/week spent on formal and informal leisure activities. Behavioral and psychological symptoms in dementia (BPSD) were assessed by the Neuropsychiatric Inventory-Nursing Home version, physical function by the Physical Self-Maintenance Scale, and psychotropic drug use by the Anatomical Therapeutic Chemical classification system. Organizational factors were ward size and staff ratio. Results: Generalized linear mixed-effect models and two-part modelling revealed an association between increased formal care time and poorer physical function, higher agitation and psychotropic drug use and lower cognitive function (all p < .05). Enhanced formal leisure time was related to better ADL function (p < .05) and smaller wards (p < .05). The family related leisure time was associated with agitation, decline in ADL function, smaller wards, and better staffing ratio (all p < .05). Married patients received more informal direct care (p < .05) and leisure time (p < .05) compared to unmarried/widowed. Conclusion: For nursing home staff, higher agitation and psychotropic drug use, and lower cognitive function, is associated with more direct care time, whereas leisure time activities are less prioritized in people with lower physical function. Informal caregivers' engagement is encouraged by smaller nursing homes and better staff ratio. Therefore, we recommend stakeholders and healthcare professionals to consider these clinical and organizational factors to optimize treatment and leisure time activities in nursing home patients with various needs. Show less
Harding, A.J.E.; Doherty, J.; Bavelaar, L.; Walshe, C.; Preston, N.; Kaasalainen, S.; ... ; MySupport Study Group 2022
Background: Where it has been determined that a resident in a nursing home living with dementia loses decisional capacity, nursing home staff must deliver care that is in the person's best... Show moreBackground: Where it has been determined that a resident in a nursing home living with dementia loses decisional capacity, nursing home staff must deliver care that is in the person's best interests. Ideally, decisions should be made involving those close to the person, typically a family carer and health and social care providers. The aim of the Family Carer Decisional Support intervention is to inform family carers on end-of-life care options for a person living with advanced dementia and enable them to contribute to advance care planning. This implementation study proposes to; 1) adopt and apply the intervention internationally; and, 2) train nursing home staff to deliver the family carer decision support intervention. Methods: This study will employ a multiple case study design to allow an understanding of the implementation process and to identify the factors which determine how well the intervention will work as intended. We will enrol nursing homes from each country (Canada n = 2 Republic of Ireland = 2, three regions in the UK n = 2 each, The Netherlands n = 2, Italy n = 2 and the Czech Republic n = 2) to reflect the range of characteristics in each national and local context. The RE-AIM (reach, effectiveness, adoption, implementation, maintenance) framework will guide the evaluation of implementation of the training and information resources. Our mixed methods study design has three phases to (1) establish knowledge about the context of implementation, (2) participant baseline information and measures and (3) follow up evaluation. Discussion: The use of a multiple case study design will enable evaluation of the intervention in different national, regional, cultural, clinical, social and organisational contexts, and we anticipate collecting rich and in-depth data. While it is hoped that the intervention resources will impact on policy and practice in the nursing homes that are recruited to the study, the development of implementation guidelines will ensure impact on wider national policy and practice. It is our aim that the resources will be sustainable beyond the duration of the study and this will enable the resources to have a longstanding relevance for future advance care planning practice for staff, family carers and residents with advanced dementia. Show less
Nishimura, M.; Harrison Dening, K.; Sampson, E.L.; Iglesias de Oliveira Vidal, E.; Correia de Abreu, W.; Kaasalainen, S.; ... ; Steen, J.T. van der 2022
BackgroundTo support family caregivers of people with dementia in end-of-life decision making, a family booklet on comfort care has been adapted and adopted by several European jurisdictions since... Show moreBackgroundTo support family caregivers of people with dementia in end-of-life decision making, a family booklet on comfort care has been adapted and adopted by several European jurisdictions since the original publication in Canada in 2005.MethodsWe analyzed and compared the adaptations to the family booklets used in Canada, the Czech Republic, Italy, the Netherlands, the UK and Ireland that were made up to 2021. Qualitative content analysis was used to create a typology of changes to the original booklet. Interviews with the teams that adapted the booklets contributed to methodological triangulation. Further, using an established framework, we assessed whether the contents of the booklets addressed all domains relevant to optimal palliative dementia care.ResultsThe booklets differed in the types of treatment addressed, in particular tube feeding, euthanasia, and spiritual care. There was also variability in the extent to which medical details were provided, an emphasis on previously expressed wishes in medical decision making, addressing of treatment dilemmas at the end of life, the tone of the messages (indirect or explicit) and the discussion of prognosis (as more or less positive), and the involvement of various healthcare professionals and family caregivers in care. All booklets addressed all domains of palliative dementia care.ConclusionsWe identified core elements in providing information on end-of-life care to family caregivers of people with dementia as related to optimal palliative care in dementia. Additionally, local adaptations and updates are required to account for socio-cultural, clinical, and legal differences which may also change over time. These results may inform development of educational and advance care planning materials for different contexts. Show less
The primary aim of this thesis was to investigate the complex relationship between pain, neuropsychiatric symptoms, and ADL functioning in persons with dementia. Furthermore, we studied the... Show moreThe primary aim of this thesis was to investigate the complex relationship between pain, neuropsychiatric symptoms, and ADL functioning in persons with dementia. Furthermore, we studied the psychometric properties of a new and universal observational pain assessment instrument Pain Assessment In Impaired Cognition: PAIC.The results of this thesis show that pain in nursing home residents with dementia is related to a decline in ADL functions, independent of dementia severity. Specifically, a decline in the ADL activities transferring and bathing.Additionally, the psychometric evaluation of the PAIC presented in this thesis not only results in a promising measurement instrument, but also provides useful information for the development and improvement of educational programmes that contribute to the utilization of the PAIC15. Show less
Introduction: Informal caregivers often support nursing home residents with dementia in making therapeutic decisions. We explored the perceptions, needs and preferences of informal caregivers of... Show moreIntroduction: Informal caregivers often support nursing home residents with dementia in making therapeutic decisions. We explored the perceptions, needs and preferences of informal caregivers of nursing home residents with dementia regarding physical therapy.Method: We conducted eleven semi-structured interviews. Thematic analysis was used.Results: Five themes emerged: 1) visibility and familiarity; 2) communication; 3) aim and content; 4) dosage and location; 5) level of expertise and the role of the physical therapist within the interdisciplinary team. Informal caregivers' perceptions of physical therapy included a lack of visibility and familiarity. They needed more communication, and empathic communication skills of the physical therapists. Preferences included physical therapy to be enjoyable, accessible and tailored to the needs of the resident.Conclusion: Physical therapists need to involve informal caregivers in physical therapy care. Implementing shared decision-making will help to get informal caregivers more involved, but has yet to be studied in this setting. (C) 2022 Elsevier Inc. All rights reserved. Show less
Groenendaal, M.; Smaling, H.J.A.; Achterberg, W.P.; Caljouw, M.A.A. 2022
This systematic review summarizes the experiences with maintaining meaningful activities for persons with dementia during transitions of care, including related barriers and facilitators, and... Show moreThis systematic review summarizes the experiences with maintaining meaningful activities for persons with dementia during transitions of care, including related barriers and facilitators, and interventions and strategies. A systematic search was performed in eight databases. The methodological quality was assessed with the Mixed Methods Appraisal Tool.Four articles were included; one describing the transition from home to hospital and vice versa, and three describing the transition from home to nursing home. The narrative synthesis revealed a decrease of meaningful activities after transition. Facilitators of and barriers to maintaining meaningful activities during transitions were related to the person with dementia, informal caregivers, healthcare professionals and organization of care, as well as the environment. Interventions and strategies focused on continuously adjusting meaningful activities to the person. To conclude, maintaining meaningful activities during transitions is an under-researched area. Several recommendations are provided for healthcare professionals and organizations. (C) 2022 The Authors. Published by Elsevier Inc. Show less
Vitamin D is a hormone produced in the skin via a non-enzymatic process involving ultraviolet light.It is well known that the physiology of aging makes older people particularly susceptible to... Show moreVitamin D is a hormone produced in the skin via a non-enzymatic process involving ultraviolet light.It is well known that the physiology of aging makes older people particularly susceptible to vitamin D deficiency and that, if untreated, it can have serious health consequences. This thesis deliberates on the topics of vitamin D supplementation in older people in light of the current guidelines and on the possible additional effects of ultraviolet light beyond vitamin D synthesis on nursing home residents. We present a cross-sectional study in nursing home residents aged 70 years and over designed to evaluate the efficacy of vitamin D supplementation in achieving vitamin D sufficiency. We also discuss the different supplementation strategies for nursing home residents and community dwelling persons aged 70 years and over based on a survey administered to general practitioners and elderly care physicians in the Netherlands.In the second part we concentrate on additional effects of ultraviolet light beyond vitamin D synthesis. We describe our systematic review of literature on the effect of ultraviolet light, when applied to the skin or eyes, on mood, depression and well-being. We present also our randomized controlled trial on the effect of ultraviolet radiation compared with oral vitamin D supplementation on the well-being of nursing home residents with dementia. Further we use the data of the RCT to carry out a post-hoc analysis to compare the effect of vitamin D alone compared with ultraviolet radiation on the blood pressure of old people with dementia. Show less
Introduction: Although increased cholesterol level has been acknowledged as a risk factor for dementia, evidence synthesis based on published data has yielded mixed results. This is especially... Show moreIntroduction: Although increased cholesterol level has been acknowledged as a risk factor for dementia, evidence synthesis based on published data has yielded mixed results. This is especially relevant in older adults where individual studies report non-linear relationships between cholesterol and cognition and, in some cases, find higher cholesterol associated with a lower risk of subsequent cognitive decline or dementia. Prior evidence synthesis based on published results has not allowed us to focus on older adults or to standardize analyses across studies. Given our ageing population, an increased risk of dementia in older adults, and the need for proportionate treatment in this age group, an individual participant data (IPD) meta-analysis is timely. Method: We combined data from 8 studies and over 21,000 participants aged 60 years and over in a 2-stage IPD to examine the relationship between total, high-density, and low-density lipoprotein (HDL and LDL) cholesterol and subsequent incident dementia or cognitive decline, with the latter categorized using a reliable change index method. Results: Meta-analyses found no relationship between total, HDL, or LDL cholesterol (per millimoles per litre increase) and risk of cognitive decline in this older adult group averaging 76 years of age. For total cholesterol and cognitive decline: odds ratio (OR) 0.93 (95% confidence interval [CI] 0.86: 1.01) and for incident dementia: OR 1.01 [95% CI 0.89: 1.13]. This was not altered by rerunning the analyses separately for statin users and non-users or by the presence of an APOE e4 allele. Conclusion: There were no clear consistent relationships between cholesterol and cognitive decline or dementia in this older adult group, nor was there evidence of effect modification by statin use. Further work is needed in younger populations to understand the role of cholesterol across the life-course and to identify any relevant intervention points. This is especially important if modification of cholesterol is to be further evaluated for its potential influence on risk of cognitive decline or dementia. Show less
Background Observational studies have reported an inverse association between ultraviolet (UV) radiation and hypertension. The aim of this study was to assess differences in blood pressure changes... Show moreBackground Observational studies have reported an inverse association between ultraviolet (UV) radiation and hypertension. The aim of this study was to assess differences in blood pressure changes between persons with dementia receiving UV light versus vitamin D (VD) supplementation. Methods Post-hoc analysis of randomized controlled trial data concerning nursing home residents with dementia (N = 61; 41 women, mean age 84.8 years). The participants received half-body UV irradiation, twice weekly over 6 months, at one standard erythema dose (UV group, n = 22) or 5600 international units of cholecalciferol once a week (VD group, n = 39). Short-term effects were evaluated after 1 month and long-term effects after 3 and 6 months. Differences in blood pressure changes were assessed using linear mixed models. Results With the VD group as a reference, the estimated difference in mean change of systolic blood pressure was - 26.0 mmHg [95% confidence interval (CI) -39.9, - 12.1, p = .000] at 1 month, 4.5 mmHg (95% CI -6.8, 15.9, p = 0.432) at 3 months, and 0.1 (95% CI -14.1, 14.3, p = 0.83) at 6 months. The estimated difference in diastolic blood pressure was - 10.0 mmHg (95% CI -19.2, - 0.7, p = 0.035) at 1 month, 3.6 mmHg (95% CI -4.1, 11.2, p = 0.358) at 3 months, and 2.7 (95% CI -6.8, 12.1, p = 0.580) at 6 months. Conclusions UV light had only a short-term effect but not a long-term effect on blood pressure reduction compared to VD use in this sample of normotensive to mild hypertensive nursing home residents with dementia. Future studies will be needed to determine the effect of UV light in different samples of the population and especially in a population with hypertension. Show less
