A randomized placebo-controlled trial of nicotinamide riboside in older adults with mild cognitive impairment.

Nicotinamide riboside (NR) increases blood levels of NAD+, a cofactor central to energy metabolism, and improves brain function in some rodent models of neurodegeneration. We conducted a placebo-controlled randomized pilot study with the primary objective of determining safety of NR in older adults with mild cognitive impairment (MCI). Twenty subjects with MCI were randomized to receive placebo or NR using dose escalation to achieve, and maintain, a final dose of 1 g/day over a 10-week study duration. The primary outcome was post-treatment change from baseline measures of cognition (Montreal Cognitive Assessment, MoCA). Predefined secondary outcomes included post-treatment changes in cerebral blood flow (CBF); blood NAD+ levels; and additional neurocognitive, psychometric, and physical performance tests. DNA methylation was assessed in peripheral blood mononuclear cells (PBMCs) as an exploratory outcome. The target NR dose was safely achieved as evidenced by a 2.6-fold increase in blood NAD+ in the NR group (p < 0.001, 95% CI [17.77, 43.49]) with no between-group difference in adverse event reporting. MoCA and other neurocognitive and psychometric metrics remained stable throughout the study. NR reduced CBF in the default mode network (DMN) with greatest differences observed in the left inferior parietal lobe (IPL) (DMN p = 0.013, µ = 0.92, 95% CI [0.23, 1.62]; left IPL p = 0.009, µ = 1.66, 95% CI [0.5, 2.82]). Walking speed in the placebo group significantly improved across the study duration suggestive of a practice effect but did not change in the NR group (p = 0.0402 and p = 0.4698, respectively). Other secondary outcome measures remained stable. Global methylation analyses indicated a modest NR-associated increase in DNA methylation and concomitant reduction in epigenetic age as measured by PhenoAge and GrimAge epigenetic clock analyses. In summary, NR significantly increased blood NAD+ concentrations in older adults with MCI. NR was well tolerated and did not alter cognition. While CBF was reduced by NR treatment, statistical significance would not have withstood multiple comparisons correction. A larger trial of longer duration is needed to determine the potential of NR as a strategy to improve cognition and alter CBF in older adults with MCI. ClinicalTrials.gov NCT02942888.

Competencies for video telemedicine with older adult patients.

BACKGROUND: Telemedicine has recently become a part of mainstream clinical practice. Many curricula have been developed to teach general and specialty-specific video telemedicine skills; however, a lack of defined best practices for translating comprehensive interprofessional geriatric care to the virtual setting presents a unique challenge to educators and clinicians. This manuscript introduces and describes the development of competencies for video telemedicine with older adults for all health professionals who treat them. METHODS: A modified Delphi process was used in competency development. In 2019, interprofessional clinicians and educators who had expertise in telemedicine formed a competency development workgroup. The aim was to draft competencies for interprofessional video telemedicine with older adults while not duplicating existing competencies in geriatrics, interprofessional care, or general telemedicine. Draft competencies were circulated among experts in geriatric telemedicine and geriatric education for two rounds of comments. The competencies incorporated comments from 41 clinicians representing 7 professions. RESULTS: Twenty-three competencies were created spanning six domains. A temporal organization by domain was used: (1) Overarching considerations, (2) Pre-visit preparation, (3) Beginning of the visit, (4) History taking and communication during the visit, (5) Exam during the visit (organized by the 5Ms: Mind, Mobility, Medication, Multicomplexity, and Matters Most), and (6) Post-visit coordination. CONCLUSIONS: These newly developed competencies fill a gap left by those developed for specific disciplines or that do not address considerations for older adults. They lay the groundwork for curriculum development and the development of virtual Age-Friendly care.

A geriatrics walking clinic improves hemoglobin A1c and timed gait in older veterans with type 2 diabetes.

Over one quarter of older adults in the U.S. has diabetes; and, physical activity is important for the promotion of healthy aging in this population. The purpose of this clinical demonstration project is to evaluate the effect of physical activity in the form of walking on glycemic control and timed gait in older Veterans with type 2 diabetes (T2D). Veterans aged ≥60 years were enrolled in the Geriatrics Walking Clinic (GWC), a clinical demonstration project, at South Texas Veterans Health Care System. GWC is a 6-week clinical program that promotes physical activity and is delivered by a registered nurse/diabetes educator and geriatrician. Veterans were recruited from the VA clinics. Enrolled patients received a pedometer at an initial face-to-face visit, were followed with weekly phone calls to monitor steps/day, received encouragement, and participated in a final face-to-face visit at the end of 6 weeks. In a sub-set of patients with T2D, we performed a chart review and recorded Hemoglobin A1c (HbA1c) at 3, 6, and 12 months after completion of the program. Timed Gait, a major characteristic of frailty, was measured at baseline and after completing the program. Change in HbA1c and timed gait compared to baseline was examined using paired t-tests. Sixty-two patients had HbA1c values available and were included in this analysis. Of these, 36, 52, and 61 patients had repeat HbA1c at 3, 6, and 12 months after the intervention, respectively. Mean age was 68 ± 6 years, 58% were Hispanic, and 92% males. HbA1c improved at 3 months (-0.49, 95% CI: -0.87 to -0.12, p=0.013), at 6 months (-0.40, 95% CI: -0.68 to -0.12, p=0.006), and at 12 months (-0.30, 95% CI: -0.57 to -0.029, p=0.031) compared to baseline. Timed Gait also improved (9.3 ±1.7 vs. 10.2 ±1.8, p<0.001). The finding highlights that older patients with T2D benefit from a GWC with improved glycemic control and timed gait.

National Geriatric Network Rapidly Addresses Trainee Telehealth Needs in Response to COVID-19.

BACKGROUND/OBJECTIVES: Coronavirus disease 2019 (COVID-19) has pushed many geriatric healthcare providers to attempt video visits for the first time. Although the Veterans Health Administration (VA) is a pioneer in telemedicine, rapid shifts to nearly exclusive use of telehealth for healthcare delivery and changes regarding trainee engagement in telehealth served as the impetus for rapidly assessing telehealth training needs. DESIGN: National needs assessment (online survey) of associated health trainees and medical fellows affiliated with Geriatric Research Education and Clinical Centers (GRECCs). SETTING: National GRECC network -- 20 VA centers of excellence focused on supporting Veterans as they age. Each GRECC is affiliated with a school of medicine at a major university. PARTICIPANTS: Trainees (n = 89) representing 12 disciplines. RESULTS: Two-thirds of participants had received some telehealth training. However, most had never done a video-to-home visit, and, regardless of telehealth experience, they reported low confidence. Based on open-ended questions exploring training needs, educational resources were rapidly developed and disseminated. INTERVENTION: Within 1 week of the assessment, a nuts-and-bolts guide regarding remote access, technology requirements, video-conferencing platforms, and managing emergencies was sent to the national network of GRECC associate directors for education for dissemination among discipline-specific training directors at their sites. This resource was subsequently submitted to the national VA COVID Strong Practices SharePoint site. An interdisciplinary team of geriatric specialists with extensive video-to-home experience also organized a national webinar that peaked at just over 700 participants. GRECC Connect, a network of geriatric specialty teams funded to improve care access for rural older veterans using telehealth and associated health training programs at each GRECC facilitated rapid development and dissemination of both resources. CONCLUSION: We quickly identified and responded to telehealth training needs of geriatrics trainees to optimize care for rural older adults as part of a rapid response to COVID-19. Although the webinar and nuts-and-bolts resources were developed within the VA context, they have demonstrated high demand and broader applicability. Results should continue to inform curriculum development efforts to address telehealth training gaps within and outside the VA.

Rationale and Study Design of a Randomized Clinical Trial of Metformin to Prevent Frailty in Older Adults With Prediabetes.

BACKGROUND: Frailty is a geriatric syndrome that leads to poor health outcomes with aging. Previous studies have demonstrated that insulin resistance and inflammation predict frailty onset. Metformin is a widely used, well-tolerated drug that improves insulin sensitivity and displays anti-inflammatory properties. It is also known to prevent diabetes onset in adults with prediabetes. We hypothesize that metformin in older adults with prediabetes will promote healthy aging and prevent frailty. Here we describe an ongoing placebo-controlled, double-blinded clinical trial of metformin for the prevention of frailty in older adults with prediabetes. METHODS: Older adults aged more than 65 years are randomized to metformin or placebo and are followed for 2 years. Prediabetes, required for inclusion, is assessed by 2-hour oral glucose tolerance test. Exclusion criteria are baseline frailty (Fried criteria), diabetes, dementia, untreated depression, active malignancy, or severe cardiovascular, pulmonary, and neurologic diseases. Primary outcome is frailty; secondary outcomes are physical function (Short Physical Performance Battery), systemic and skeletal muscle tissue inflammation, muscle insulin signaling, insulin sensitivity (insulin clamp), glucose tolerance (oral glucose tolerance test), and body composition (dual-energy x-ray absorptiometry). Subjects are followed every 3 months for safety assessments and every 6 months for frailty assessment (Fried criteria) and oral glucose tolerance test, and every 12 or 24 months for secondary outcomes. Enrollment of 120 subjects (completers) will take place over a 2-year period. CONCLUSION: Metformin is being examined in this study as a potential therapeutic agent to prevent frailty in older adults with prediabetes. Findings from this trial may have future implications for the screening and potential treatment of prediabetes in older patients with metformin for the prevention of frailty.

Introducing Aquifer Geriatrics, the American Geriatrics Society National Online Curriculum.

Aquifer Geriatrics, formerly web-based Geriatrics Education Modules, was initially developed through Donald W. Reynolds Foundation funding, and is now the national curriculum of the American Geriatrics Society and the Association of Directors of Geriatric Academic Programs. Aquifer Geriatrics consists of 26 evidence-based, peer-reviewed, online case-based modules based on the Association of American Medical Colleges/John A. Hartford Foundation Minimum Geriatrics Competencies for Medical Students and is available by subscription at www.aquifer.org/courses. This curriculum aims to help address the national shortage of geriatrics educators, complement current teaching, bridge content gaps in geriatrics education, and standardize geriatrics-focused educational content. This report will describe the development of Aquifer Geriatrics, highlight best practices to incorporate cases in a variety of teaching settings, describe teaching methods that utilize the curriculum to create a robust experience for learners, and address the cost of obtaining the curriculum. J Am Geriatr Soc 67:811-817, 2019.

Creation of an Interprofessional Teledementia Clinic for Rural Veterans: Preliminary Data.

The teledementia clinic is a new model of care that expands the reach of specialized geriatric and dementia care using clinical video telehealth (CVT) to rural veterans, who frequently lack access to specialty care. The clinic is a Veterans Affairs (VA) Geriatric Research, Education, and Clinical Center clinical demonstration project. It is located in the Pittsburgh VA Healthcare System tertiary referral hospital and serves veterans in affiliated rural community-based outpatient clinics (CBOCs). Rural CBOC primary care providers refer clinic patients, or referral is according to previous cognitive impairment diagnosis in a VAPHS geriatric clinic. Patients undergo interprofessional dementia assessment by a geriatrician, geropsychologist, geriatric psychiatrist or neurologist, and social worker using CVT technology. Metrics for clinic evaluation included rural patients served and savings in travel time, distance, and costs. Assessments collected depended upon individual presentation and included cognitive tests, geriatric depression scales, functional assessment, and the Zarit Burden Interview. A patient satisfaction survey was created and administered. In the first year, 95 individuals were served in 156 clinic visits and 251 interprofessional provider encounters. Of patients served, 61 lived in rural ZIP codes, 72 were diagnosed with dementia, 19 were diagnosed with mild cognitive impairment, and four were found to have primarily psychiatric diagnoses rather than cognitive impairment. The average Functional Assessment Staging of Alzheimer's Disease Scale score was 4.3 ± 1.3. This clinic model demonstrates that CVT technology is a feasible means of providing interprofessional dementia evaluations and follow-up to rural presidents.

Association of Hearing Impairment With Incident Frailty and Falls in Older Adults.

OBJECTIVE: We aimed to determine whether hearing impairment (HI) in older adults is associated with the development of frailty and falls. METHOD: Longitudinal analysis of observational data from the Health, Aging and Body Composition study of 2,000 participants aged 70 to 79 was conducted. Hearing was defined by the pure-tone-average of hearing thresholds at 0.5, 1, 2, and 4 kHz in the better hearing ear. Frailty was defined as a gait speed of <0.60 m/s and/or inability to rise from a chair without using arms. Falls were assessed annually by self-report. RESULTS: Older adults with moderate-or-greater HI had a 63% increased risk of developing frailty (adjusted hazard ratio [HR] = 1.63, 95% confidence interval [CI] = [1.26, 2.12]) compared with normal-hearing individuals. Moderate-or-greater HI was significantly associated with a greater annual percent increase in odds of falling over time (9.7%, 95% CI = [7.0, 12.4] compared with normal hearing, 4.4%, 95% CI = [2.6, 6.2]). DISCUSSION: HI is independently associated with the risk of frailty in older adults and with greater odds of falling over time.