Structural-functional connectivity bandwidth of the human brain.

BACKGROUND: The human brain is a complex network that seamlessly manifests behaviour and cognition. This network comprises neurons that directly, or indirectly mediate communication between brain regions. Here, we show how multilayer/multiplex network analysis provides a suitable framework to uncover the throughput of structural connectivity (SC) to mediate information transfer-giving rise to functional connectivity (FC). METHOD: We implemented a novel method to reconcile SC and FC using diffusion and resting-state functional MRI connectivity data from 484 subjects (272 females, 212 males; age = 29.15 ± 3.47) from the Human Connectome Project. First, we counted the number of direct and indirect structural paths that mediate FC. FC nodes with indirect SC paths were then weighted according to their least restrictive SC path. We refer to this as SC-FC Bandwidth. We then mapped paths with the highest SC-FC Bandwidth across 7 canonical resting-state networks. FINDINGS: We found that most pairs of FC nodes were connected by SC paths of length two and three (SC paths of length >5 were virtually non-existent). Direct SC-FC connections accounted for only 10% of all SC-FC connections. The majority of FC nodes without a direct SC path were mediated by a proportion of two (44%) or three SC path lengths (39%). Only a small proportion of FC nodes were mediated by SC path lengths of four (5%). We found high-bandwidth direct SC-FC connections show dense intra- and sparse inter-network connectivity, with a bilateral, anteroposterior distribution. High bandwidth SC-FC triangles have a right superomedial distribution within the somatomotor network. High-bandwidth SC-FC quads have a superoposterior distribution within the default mode network. CONCLUSION: Our method allows the measurement of indirect SC-FC using undirected, weighted graphs derived from multimodal MRI data in order to map the location and throughput of SC to mediate FC. An extension of this work may be to explore how SC-FC Bandwidth changes over time, relates to cognition/behavior, and if this measure reflects a marker of neurological injury or psychiatric disorders.

The Impact of Multiple Long-Term Care Services Use on Dementia and Nondementia Caregivers' Health Care Utilization and Costs.

BACKGROUND: The study examined the effects of multiple long-term care (LTC) services (i.e., using both social and professional care services) on caregivers of service recipients with and without dementia. METHODS: We retrieved data for 10,771 caregivers of older adults in the Ten-Year Long-Term Care Project (TLTCP) in Taiwan. We examined the effects of care recipients' initial prescription of single or multiple LTC services on their caregivers' healthcare services use, including outpatient, emergency department (ED), and inpatient services. RESULTS: For care recipients prescribed a single LTC service, dementia caregivers had 0.82 more ED visits and 10.4% higher total fees than nondementia caregivers (p < .05). However, for care recipients prescribed multiple LTC services, dementia caregivers and nondementia caregivers used healthcare services at similar levels, and dementia caregivers had 3.5% lower per-visit outpatient fees (p < .05). DISCUSSION: Providing multiple LTC services for people with dementia results in great benefit to their caregivers.

[Driving Cessation and Mental Health in Persons With Dementia: A Preliminary Study].

BACKGROUND: The driving safety of persons with dementia (PwD) is an important public-health issue worldwide. Driving is closely related to personal autonomy, self-esteem, and independence. When PwD lose their driving privileges, this may lead to negative effects on mental health. PURPOSE: The purpose of this study was to evaluate the relationship between driving cessation and mental health in PwD. METHODS: A cross-sectional design with convenient sampling was used, Data were collected using structured questionnaires. Participants were all PwDs who were recruited from a medical center in northern Taiwan. RESULTS: A total of 78 PwD were recruited. Two-fifths (41%) of the participants were still driving, with motorcycle the most common vehicle used. The participants who had retired from driving were older, and most did not have a spouse, were less socially active, had a lower mean level of functional ability, and perceived a lower association between driving and quality of life. Driving cessation was found to be positively correlated with age and the instrumental activities of daily living. Depression and anxiety levels in former drivers were higher than in current drivers, although the differences were not significant. CONCLUSIONS / IMPLICATIONS FOR PRACTICE: Among PwD, depression and anxiety is higher in former drivers. It is suggested that a prospective study should be conducted, that driving safety issues for PwD should be addressed in public health education, and that standards of driving safety for PwD should be developed and enacted.

Decision-Making in People With Dementia or Mild Cognitive Impairment: A Narrative Review of Decision-Making Tools.

OBJECTIVES: This review summarized the applicability of various decision-making tools for helping people with dementia or mild cognitive impairment (MCI) and their families make decisions. DESIGN: This study was a narrative literature review. The protocol of this review was registered in the International Prospective Register of Systematic Reviews (PROSPERO ID: CRD42020182259). SETTING AND PARTICIPANTS: People with dementia or MCI and their families were included in this study. METHODS: This review was conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses statement. We searched the Cochrane Library, PubMed, Embase, Cumulative Index to Nursing and Allied Health Literature, and Chinese Electronic Periodical Services databases from inception to May 2021. The Joanna Briggs Institute Critical Appraisal Checklists for a variety of study designs were used. RESULTS: Topics related to decision-making were categorized as everyday activity decisions or medical treatment decisions. Various types of decision-making tools were identified, and we observed that decision aids can be modified and used for both everyday activity decisions and medical treatment decisions. In addition to highlighting decision aids for specific decisional issues and topics, we also elucidated other validated tools that can be used to facilitate the decision-making process. CONCLUSIONS AND IMPLICATIONS: This study highlighted the topics involved in decision-making and using decision-making tools. The current review provides information that can help individuals and health care professionals choose optimal decision-making tools. On the basis of our findings, future studies can determine the most appropriate tools for intervention or outcome measures.

Mandarin version of dementia and driving decision aid (DDDA): Development and stakeholder evaluation in Taiwan.

BACKGROUND: Dementia causes cognitive and memory difficulties which can reduce the driving safety of the individuals. The decision-making process for driving retirement is challenging, and yet limited guidance is available. OBJECTIVES: This article reports the development of the Taiwanese version of dementia and driving decision aid (DDDA) and the evaluation from stakeholders through a dementia and driving education programme. METHODS: A multi-method approach was adopted using a pre-test, post-test survey and focus group interviews. A total of 154 healthcare professionals, family caregivers and people with dementia participated education programme, and 12 experts attended the focus group discussion. The survey included demographics, knowledge, confidence, competence and awareness of using DDDA. Participants completed a survey prior and immediately after the education programme. We translated a 32-page interactive DDDA booklet from the original English version to Mandarin. The education programme consisted of three-hour dementia and driving education module delivered both face-to-face and online. RESULTS: The majority of participants described the booklet as balanced (91.7%) with the information presented in a 'good' or 'excellent' manner (93.4%). Most participants (85.3%) felt that DDDA helps them in making decisions about driving. Five themes were extracted from the focus group interview: (1) approach targeted to people with dementia, (2) specific content and additional information, (3) culturally appropriate modification, (4) having the right to drive and (5) booklet dissemination. The knowledge, confidence, competence and awareness of using the DDDA increased significantly (p < 0.001) after the education programmes. CONCLUSION: We anticipate that use of the DDDA booklet will raise awareness of this social and health issue among the general public and facilitate collaborations with clinicians, municipalities and related organisations in providing a decision-making resource material for those with people living with dementia and their families. This study was not a clinical trial and the focus of this study was development and evaluation of the DDDA booklet. As mentioned in the methods section, participants were invited to attend the education program and provided their thoughts on the DDDA booklet based on their satisfaction level. Moreover, the education program was a one-day, workshop type program. This study was neither "prospectively assigns human participants or groups of humans to one or more health-related interventions" nor "to evaluate the effects on health outcomes", according to the definition of clinical trial by WHO. Therefore, we did not consider this study was a clinical trial. IMPLICATIONS FOR PRACTICE: There is an urgent need for supporting people with dementia and their families to negotiate the complex decision-making involved in deciding to change their approach to driving. The DDDA booklet can fill an important gap in service delivery to people with dementia who are adjusting to life without driving.

The impact of different patterns of home- and community-based services on nursing home admission: National data from Taiwan.

BACKGROUND: This study had two aims: (a) to identify the different patterns of use of home- and community-based services (HCBS) among older adults in Taiwan, and (b) to examine the effects of the different use patterns on HCBS recipients' use of institutional long-term care services. METHODS: The study analyzed cohort data from Taiwan's first National 10-Year Long-Term Care Plan database and from National Health Insurance Claim Data. We extracted baseline information on older adults who were first evaluated for and prescribed HCBS from 2010 through 2013 (N = 71,260). We used latent class analysis to specify the underlying subgroups of recipients with similar patterns of HCBS use. We used hierarchical multinomial logistic regression to examine the effect of the different use patterns on the risk of institutional (e.g., nursing home) placement from 4 to 15 months after initial HCBS evaluation. RESULTS: Four subgroups of HCBS recipients were identified, with patterns of home-based personal care (PC), home-based personal care and medical care (PC/MC), home-based medical care (MC), and community care services. Compared to the home-based PC/MC group, people in the home-based MC group had lower risk (OR = 0.54) and people in the community care group had higher risk (OR = 1.76) of admission to a nursing home. CONCLUSIONS: Study findings may provide insights for policy makers regarding the usefulness of integrating medical care and other types of long-term care services into adult day care.