Older Veterans Research Articles

Change in frailty among older COVID-19 survivors.

COVID-19 survivors are at greater risk for new medical conditions. Among older adults, where multimorbidity and functional impairment are common, frailty measurement provides a tool for understanding how infection impacts future health beyond a one-disease-at-a-time approach. We investigated whether COVID-19 was associated with change in frailty among older Veterans. Data were from the Veterans Affairs (VA) COVID-19 Observational Research Collaboratory, which extracted VA medical record data. We included Veterans who had COVID-19 from March 1, 2020, to April 30, 2021 and matched uninfected controls. We excluded those <50 years at index or did not survive 12 months after. Frailty was assessed at the index date and 12 months using the VA Frailty Index (VA-FI). We assessed the number of new VA-FI deficits over 12 months. Analysis was done by negative binomial regression adjusted for age, gender, race, ethnicity, and BMI. Coefficients are given as the ratio of the mean number of new deficits in COVID-19 cases versus controls during follow-up. We identified 91,338 COVID-19-infected Veterans and an equal number of matched controls. Median (IQR) age was 68.9 years (60.3-74.2), 5% were female, 71% were White, and baseline VA-FI was 0.16 (0.10, 0.26). Median (IQR) number of new deficits at 1 year was 1 (0-2) for infected and 0 (0-1) for uninfected controls. After adjustment, those with COVID-19 accrued 1.54 (95% CI 1.52-1.56) times more deficits than those who did not. The five most common new deficits were fatigue (9.7%), anemia (6.8%), muscle atrophy (6.5%), gait abnormality (6.2%), and arthritis (5.8%). We found a greater increase in frailty among older Veterans with COVID-19 compared with matched uninfected controls, suggesting that COVID-19 infection has long-term implications for vulnerability and disability among older adults. Functional impairments such as fatigue, impaired mobility, and joint pain may warrant specific attention in this population.

Are veterans willing to assist with firearm safety for suicide prevention?

ABSTRACT Veterans in the United States are affected by suicide at higher rates than the general population. This may be due to a higher probability for veterans to use more lethal methods of suicides such as firearms. While veterans often decline to disclose suicidal tendencies to healthcare providers, they show higher connectedness and willingness to heed the advice of peers. Considering this information, it is important to analyze how veteran peers could assist in a suicidal crisis. Veteran responses (n = 1,247) to the Gatekeeper Behavior Scale (GBS) and Firearm Safety Scale (FSS) were analyzed to determine predictive traits of willingness to assist a peer securely store or disable firearms during a suicidal crisis. Results show that veterans are willing to assist in securing firearms to prevent suicide death but are more willing to do so by locking, removing or disabling the firearms than storing them with law enforcement. Older veterans were also more likely to report a willingness to intervene than their younger peers. Of the GBS predictors, only the Likeliness to Help subscale predicted a willingness to intervene with firearm safety. Recommendations for training and interventions that further encourage helping behavior during suicidal episodes are discussed.

The Impact of Executive Function on Retention and Compliance in Physical Therapy in Veterans

ObjectiveTo examine retention and compliance to a novel Physical Therapy (PT) treatment among Veterans with and without executive function deficits (EFD+/EFD-). DesignThis study was a preplanned secondary analysis of an ongoing randomized controlled trial. SettingOutpatient PT at VA Boston Healthcare System (VABHS). ParticipantsSeventy-two community-dwelling middle-aged and older Veterans (mean age 72, (range 51-91); 87% male) with gait speed between 0.5 and 1.0 m/s were recruited from primary care practices. InterventionsEight-week moderate to vigorous intensity PT program. Main outcome measureVeterans’ baseline mobility, retention (dropouts), and treatment compliance and post-treatment exercise compliance to 8-week PT treatment were evaluated based on their baseline EFD status. ResultsOf the 72 participants, 22% (n=16) were EFD+. Veterans with EFD+ at baseline had worse mobility performance (Short Physical Performance Battery (SPPB), 7.7 vs. 9.5, p<0.001) and patient-reported mobility (Activity Measure for Post-Acute Care (AM-PAC), 57.6 vs. 62.2, p<0.01) after adjusting for age, gender, number of comorbidities, depressive symptoms, and pain interference. Dropout rates for EFD+ and EFD- were 44% and 25%, respectively (p>0.05). In multivariable logistic regression modeling, pain interference, depressive symptoms, mobility, and living alone but not EFD status were associated with dropping out. There was no evidence of significant differences in treatment compliance or post-treatment exercise compliance, measured by the number of attended sessions and the number of post-treatment exercise days by EFD status. ConclusionEFD+ was associated with poor baseline mobility. While the dropout rate was higher among Veterans with EFD+, we were unable to conclude whether EFD status impacts retention or compliance due to the small sample size. Further investigation is needed to determine whether EFD status may identify individuals who need additional support during and/or after rehabilitation treatment.

Long-Term Trajectories of Postoperative Recovery in Younger and Older Veterans

Major surgery sometimes involves long recovery or even permanent institutionalization. Little is known about long-term trajectories of postoperative recovery, as surgical registries are limited to 30-day outcomes and care can occur across various institutions. To characterize long-term postoperative recovery trajectories. This retrospective cohort study used Veterans Affairs (VA) Surgical Quality Improvement Program data (2016 through 2019) linked to the Residential History File, combining data from the VA, Medicare/Medicaid, and other sources to capture most health care utilization by days. Patients were divided into younger (younger than 65 years) or older (65 years or older) subgroups, as Medicare eligibility is age dependent. Latent-class, group-based trajectory models were developed for each group. These data were analyzed from February 2023 through August 2024. Surgical care in VA hospitals. Days elsewhere than home (DEH) were counted in 30-day periods for 275 days presurgery and 365 days postsurgery. A 5-trajectory solution was optimal and visually similar for both age groups (cases: 179 879 younger [mean age (SD) 51.2 (10.8) years; most were male [154 542 (83.0%)] and 198 803 older [mean (SD) age, 72.2 (6.0) years; 187 996 were male (97.6%)]). Most cases were in trajectories 1 and 2 (T1 and T2). T1 cases returned home within 30 days (younger, 74.0%; older, 54.2%), while T2 described delayed recovery within 30 to 60 days (younger, 21.6%; older, 35.5%). Trajectory 3 (T3) and trajectory 4 (T4) were similar for the first 30 days postsurgery, but subsequently separated with T3 representing protracted recovery of 6 months or longer (younger, 2.7%; older, 3.8%) and T4 indicating long-term loss of independence (younger, 1.3%; older, 5.2%). Few (trajectory 5) were chronically dependent, with 20 to 30 DEH per month before and after surgery (younger, 0.4%; older, 1.3%). In this study, trajectory models demonstrated clinically meaningful differences in postoperative recovery that should inform surgical decision-making. Registries should include longer-term outcomes to enable future research to distinguish patients prone to long-term loss of independence vs protracted, but meaningful recovery.

Demographics, Clinical Characteristics, and Well-Being of Veterans with TBI and Dementia and Their Caregivers.

This study provides a detailed examination of older Veterans with traumatic brain injury (TBI) and dementia and their caregivers, focusing on Veterans' demographic, clinical, functional, safety risk, and behavioral characteristics and caregivers' demographic, clinical, and care-related characteristics and well-being. Veterans' caregivers (N = 110) completed a telephone-based survey. Veterans averaged eight comorbid health conditions, with over 60% having chronic pain, hypertension, post-traumatic stress disorder, or depression. Caregivers reported helping with an average of three activities of daily living, with the highest percentages of Veterans needing assistance with grooming, dressing, and bathing. Almost all Veterans needed assistance with shopping, cooking, medication management, housework, laundry, driving, and finances. Veterans averaged two safety risks, the most common being access to dangerous objects, access to a gun, and not being able to respond to emergency situations. Although Veterans averaged 14 behavioral concerns, caregivers reported that their family needs relating to TBI were generally met or partly met, and they voiced confidence in their ability to respond to behaviors and control their upsetting thoughts. Caregivers' mean burden score was severe, while mean depression and anxiety scores were mild. Caregivers reported an average of 10.5 h per day providing care and 20.1 h per day on duty. The findings demonstrate the increased presence of impairments, safety risks, and behavioral issues in Veterans with comorbid TBI and dementia, as well as increased impacts on families' burdens and care provision requirements. Clinicians should be alert for and educate TBI patients and caregivers on the warning signs of post-TBI dementia and its associated functional, behavioral, and safety risk profile, as well as challenges related to caregiver well-being. Healthcare policymakers must consider the increased caregiver demands associated with comorbid TBI and dementia, as well as the need for expanded long-term support and services.

Veteran comfort and satisfaction with comprehensive geriatric assessment via video telehealth to home.

The purpose of this project was to measure satisfaction with virtual comprehensive geriatric assessments (CGA) among older Veterans (OVs). The CGA involved five different healthcare providers and four one-hour VA Video Connect (VVC) calls. Using specific enrollment criteria, OVs were recruited in four cohorts separated by time. After completing the CGA, participants were asked to complete a 10-statement telephone questionnaire. Before analyses, responses to each statement were dichotomized as Agree (Agree/Strongly agree) or Do not Agree (Neutral/Disagree/Strongly Disagree). Descriptive statistics and Binomial generalized linear models (GLMs) were used to analyze the data. All 269 enrolled OVs completed all components of the CGA. This included 79, 57, 61, and 72 Veterans in cohorts 1 to 4, respectively. Their average age was 76.0 ± 5.9 years, and they were predominately white (82%), male (94%), and residents of rural settings (64%). Of the 236 (88%) OVs who completed the telephone survey, 57% indicated they were comfortable using VVC and 57% expressed willingness to use VVC again; 44% felt that VVC was easier than going to in-person visits. The OVs in Cohort 1 were more likely to agree with these statements than those in the remaining cohorts, especially Cohorts 2 and 4. Differences in demographics partially explained some of these findings. The majority (89% or higher) of survey participants agreed with the remaining seven survey statements indicating they were satisfied with the CGA program. OVs were very satisfied with their participation in a program of CGA, although not necessarily the mode of delivery. The percentage of participants who indicated discomfort using VVC for the CGA visits appeared to increase with time. Further work is needed to determine which OVs would be the best candidates to use VVC to complete all or part of a CGA.

Trauma reactivation 50 years later: Yom Kippur war veterans after the October 7 attack

Fifty years after the Yom Kippur War began with a surprise attack, the October 7 terror attack caught Israelis off guard in yet another surprise attack. The current study assessed the extent to which Yom Kippur War veterans thought about the linkage between the two wars, and whether such thoughts were associated with trauma reactivation and exacerbation of distress. A web-based random sample of 297 Yom Kippur War veterans (age range 68–88) completed questionnaires five months before (T1) and two months after the October 7 attack (T2). The results showed an increase in probable posttraumatic stress disorder (PTSD) rates due to the Yom Kippur War, rising from 5.4 % in T1 to 13.1 % in T2. Rates of clinical depression and anxiety also rose. The study found that a significant number of veterans experienced intrusive thoughts linking the two wars. These intrusive thoughts increased the risk for probable PTSD and clinical levels of depression and anxiety, even after accounting for pre-attack symptoms. The study is among the first to show that intrusive linkage is quite frequent among older veterans who confronted another event that resonates with their focal trauma. Supporting the stress resolution perspective, this linkage increased the risk for trauma reactivation.

Validation of the Chumlea Equation in Home Bound Older Adult Veterans

Validation of the Chumlea Equation in Home Bound Older Adult Veterans

Adherence Of Older Veterans With Post-traumatic Stress Disorder To A 6-month Supervised Exercise Intervention

Adherence Of Older Veterans With Post-traumatic Stress Disorder To A 6-month Supervised Exercise Intervention

Graded Intensity Aerobic Exercise to Improve Cerebrovascular Function and Performance in Older Veterans: Protocol for a Randomized Controlled Trial.

Growing health care challenges resulting from a rapidly expanding aging population necessitate examining effective rehabilitation techniques that mitigate age-related comorbidity and improve quality of life. To date, exercise is one of a few proven interventions known to attenuate age-related declines in cognitive and sensorimotor functions critical to sustained independence. This work aims to implement a multimodal imaging approach to better understand the mechanistic underpinnings of the beneficial exercise-induced adaptations to sedentary older adults' brains and behaviors. Due to the complex cerebral and vascular dynamics that encompass neuroplastic change with aging and exercise, we propose an imaging protocol that will model exercise-induced changes to cerebral perfusion, cerebral vascular reactivity (CVR), and cognitive and sensorimotor task-dependent functional magnetic resonance imaging (fMRI) after prescribed exercise. Sedentary older adults (aged 65-80 years) were randomly assigned to either a 12-week aerobic-based interval-based cycling intervention or a 12-week balance and stretching intervention. Assessments of cardiovascular fitness used the YMCA submaximal VO2 test, basal cerebral perfusion using arterial spin labeling (ASL), CVR using hypercapnic fMRI, and cortical activation using fMRI during verbal fluency and motor tapping tasks. A battery of cognitive-executive and motor function tasks outside the scanning environment will be performed before and after the interventions. Our studies and others show that improved cardiovascular fitness in older adults results in improved outcomes related to physical and cognitive health as well as quality of life. A consistent but unexplained finding in many of these studies is a change in cortical activation patterns during task-based fMRI, which corresponds with improved task performance (cognitive-executive and motor). We hypothesize that the 12-week aerobic exercise intervention will increase basal perfusion and improve CVR through a greater magnitude of reactivity in brain areas susceptible to neural and vascular decline (inferior frontal and motor cortices) in previously sedentary older adults. To differentiate between neural and vascular adaptations in these regions, we will map changes in basal perfusion and CVR over the inferior frontal and the motor cortices-regions we have previously shown to be beneficially altered during fMRI BOLD (blood oxygen level dependent), such as verbal fluency and motor tapping, through improved cardiovascular fitness. Exercise is one of the most impactful interventions for improving physical and cognitive health in aging. This study aims to better understand the mechanistic underpinnings of improved health and function of the cerebrovascular system. If our hypothesis of improved perfusion and cerebrovascular reactivity following a 12-week aerobic exercise intervention is supported, it would add critically important insights into the potential of exercise to improve brain health in aging and could inform exercise prescription for older adults at risk for neurodegenerative disease brought on by cerebrovascular dysfunction. ClinicalTrials.gov NCT05932069; https://clinicaltrials.gov/study/NCT05932069. DERR1-10.2196/58316.

B - 64 Exploring the Role of Education in Predicting Older Veterans’ Functional Performance on the Pillbox Test

Abstract Objective Previous research demonstrates older adults with less education are at higher risk of medication nonadherence (Jin et al. 2016). The Pillbox Test is a process-oriented, performance-based measurement of executive functioning designed and validated by Zartman and colleagues (2013) which may help identify individuals at risk of medication nonadherence and functional impairment. This study aimed to assess the impact educational attainment has on Pillbox Test performance. Method Participants (n = 208) included a mixed diagnostic sample of older adults who completed the Pillbox Test as part of a comprehensive neuropsychological evaluation within a neuropsychology clinic between 2019–2024 (Mage = 71.54, Meducation = 13, 62.5% Caucasian, 89.9% male). Correlational and regression analyses were conducted to evaluate the relationship between education and Pillbox Test performance. Results Pearson correlations revealed a significant negative correlation between years of education and Pillbox Test total errors, r(206) = −0.14, p &amp;lt; 0.05, such that lower education was associated with greater errors. However, linear multiple regression analyses revealed education did not uniquely predict errors on the Pillbox Test when accounting for demographic variables (race, education, age, gender). Race was the only significant predictor of Pillbox errors. Specifically, identification as Hispanic (β = 0.21, p &amp;lt; 0.01) or African American (β = 0.18, p &amp;lt; 0.05) predicted greater errors. Conclusion(s) While lower education is associated with poorer Pillbox Test performance, it does not uniquely predict performance when accounting for other demographic variables. That said, the Pillbox Test appears to be a robust measure of functional ability and executive functioning among older adults with diverse educational backgrounds and may be less susceptible to the influence of formal education than other similar measures.

Using an in-office passive leg raise to identify older adults with suboptimal blood pressure control.

Passive leg raise (PLR) is a simple, dynamic maneuver that has been used to increase preload to the heart. We hypothesize that PLR may offer a new and efficient office-based tool for assessing blood pressure (BP) control in older adults. One hundred and three veterans (≥60 years old) without known cardiovascular disease and varying degrees of blood pressure control were included in this cross-sectional cohort study. Twenty-four hour ambulatory BP monitoring identified Veterans with optimal and suboptimal BP control (≥125/75 mmHg). Bioimpedance electrodes (Baxter Medical, Deerfield, Illinois, USA) and brachial BP were used to calculate hemodynamic parameter changes across PLR states [pre-PLR, active PLR (3 min), and post-PLR]. Multiple linear regression was used to assess associations between BP control status with changes in hemodynamic parameters between PLR states. The 24-h ambulatory BP monitoring identified 43 (42%) older Veterans with optimal BP control (mean age of 70.5 ± 7.0 years) and 55 (54%) with suboptimal BP (mean age of 71.3 ± 8.7 years). Veterans with suboptimal BP control had significantly reduced change in total peripheral resistance (ΔTPR) (7.0 ± 156.0 vs. 127.3 ± 145.6 dynes s/cm5; P = 0.002) following PLR compared with Veterans with optimal BP control. Suboptimal BP control (β = -0.35, P = 0.004) had a significant association with reduced ΔTPR, even after adjusting for demographic variables. Measuring PLR-induced hemodynamic changes in the office setting may represent an alternative way to identify older adults with suboptimal BP control when 24-h ambulatory BP monitoring is not available.

Trends in hip fracture rates in US male veterans.

In the United States, the annual incidence of osteoporotic hip fracture is estimated to be 250,000 to 300,000; the one-year mortality in some studies has been as high as 32%. Reports that hip fracture rates in US women 65years and older may no longer be declining led to this investigation of hip fracture in men, a less studied population. We assessed the trends in the incidence of hip fracture in US male veterans 50years and older of age as well as the rates of diagnosis and treatment in such men. We assessed the recent trends of hip fracture incidence in a nation-wide male veteran population 50years and older of age. Using data from the US Veterans Affairs Informatics and Computing Infrastructure (VINCI) 2002-2019, we calculated the annual age-standardized hip fracture incidence. Secondary objectives included evaluating the annual proportion of hip fracture patients who underwent dual-energy X-ray absorptiometry (DXA) before or after the fracture and/or received osteoporosis medication after the hip fracture over the study period. Hip fracture incidence increased in male veterans from 2006 to 2019. Fewer than 6% of men underwent a DXA scan and fewer than 0.5% received osteoporosis medications up to two years after a hip fracture. Despite available screening methods such as DXAs and medications for primary and secondary prevention of osteoporotic fractures, hip fracture incidence is not decreasing in older male veterans. Our study highlights a need for closerattention to fracture risk in men.

Enhancing older Veterans' care: Insights from medication reviews and deprescribing interventions

BackgroundPatient experience during and after health care is a critical indicator of quality of care that encompasses effective communication, respect, dignity, and emotional support. However, qualitative studies exploring the experiences of older adults after deprescribing interventions are sparse, highlighting a knowledge gap. This project seeks to address this gap by exploring Veterans’ experiences during and after a deprescribing intervention provided by a pharmacist.This study aims to: 1. Assess Veteran's experience of the process of their Comprehensive Medication Review and deprescribing intervention visit; 2. Assess the Veteran's experience with the outcomes of their Comprehensive Medication Review and deprescribing intervention. MethodData was collected from 17 Veterans through semi-structured interviews using an interview guide. The Veteran Affairs study site utilizes the VIONE polypharmacy risk calculator to identify high-risk Veterans; the majority of these Veterans were on at least 10 medications. The interview transcripts were analyzed using inductive content analysis. Two research team members independently coded the data for categories and themes. Similarities were identified, and any divergence was discussed and resolved. To enhance the validity of the findings, member checking was performed with Veterans to confirm the results. Result and discussionMost Veterans viewed the process of the pharmacists' visits and recommendations positively. They expressed confidence in pharmacists' knowledge and instructions. They appreciated the clarity of information pharmacists provided about the purpose, proper administration, and interactions of their medications. These enhanced the Veterans’ ability to manage their medication regime. They also desired an increased frequency of interactions with their pharmacist due to these positive interactions. Veterans appreciated interprofessional collaboration between pharmacists, physicians, and other providers. Veterans expressed how pivotal lab test results were for evaluating medication recommendations and effectiveness. Most Veterans reported positive outcomes and/or indicated there were no negative effects as a result of their recent medication changes. Some reported seeking additional information from their providers regarding suggested medication changes to validate recommendations. There was some uncertainty about whether there would be follow-up visits with the professional after the medication change and who should initiate this. A minority indicated problems associated with prior medication discontinuation before the deprescribing intervention and how this limited their openness to future opportunities of deprescribing. ConclusionThis exploration of Veterans' experiences with the process and outcomes of a deprescribing service affirms its importance and overall success in this site as part of the unique publicly funded Veteran healthcare system in the US. Equally important, the positive Veteran response suggests the value of exploring its potential to benefit patients experiencing polypharmacy across a range of other sites and systems.

Feasibility of Nurse-Facilitated Advance Care Planning Among Older Veterans in a Dialysis Unit and an Oncology Infusion Center.

Many veterans with serious illnesses, such as end-stage kidney disease requiring dialysis and advanced cancer requiring treatment infusions, must make complex decisions about their current and future medical care. Advance care planning (ACP) is a process where individuals identify, express, and communicate their personal values, life goals, and preferences for care. ACP may be feasible in chemotherapy infusion centers or chronic dialysis centers during patient treatment. We assessed the feasibility of a licensed vocational nurse (LVN) facilitator to help veterans review the PREPARE for Your Care program (www.prepareforyourcare.org) and complete an advance directive (AD) in an outpatient hemodialysis unit or a chemotherapy infusion center. PREPARE For Your Care is an evidence-based online program with written pamphlets and ADs that prepares patients to participate with clinicians in making medical decisions. We measured the time to complete a session and the level of assistance required from LVNs via LVN self-report. Self-reported ease-of-use, comfort, and helpfulness were assessed on a 10-point Likert scale from 1 (not at all) to 10 (very). Twenty-eight patients were enrolled (mean age ± SD: 67 ± 11 years); all (100%) completed PREPARE and the AD within 1 session. The mean completion time was 100 (±40) minutes. Most of the patients required considerable assistance from the LVN. The mean scores were 8.0 of 10 for ease-of-use (±2.3), 7.7 of 10 (±2.8) for comfort, and 8.2 of 10 (±2.3) for helpfulness. This pilot study demonstrates that using PREPARE as an ACP tool for veterans may be feasible for patients during hemodialysis and chemotherapy infusion. Patients required considerable assistance from the LVN to complete PREPARE. Hemodialysis and chemotherapy infusion are opportunities when patients have time and space to consider ACP.

Trajectories and Transitions in Service Use Among Older Veterans at High Risk of Long-Term Institutional Care.

We aimed to identify combinations of long-term services and supports (LTSS) Veterans use, describe transitions between groups, and identify factors influencing transition. We explored LTSS across a continuum from home to institutional care. Analyses included 104,837 Veterans Health Administration (VHA) patients 66 years and older at high-risk of long-term institutional care (LTIC). We conduct latent class and latent transition analyses using VHA and Medicare data from fiscal years 2014 to 2017. We used logistic regression to identify variables associated with transition. We identified 5 latent classes: (1) No Services (11% of sample in 2015); (2) Medicare Services (31%), characterized by using LTSS only in Medicare; (3) VHA-Medicare Care Continuum (19%), including LTSS use in various settings across VHA and Medicare; (4) Personal Care Services (21%), characterized by high probabilities of using VHA homemaker/home health aide or self-directed care; and (5) Home-Centered Interdisciplinary Care (18%), characterized by a high probability of using home-based primary care. Veterans frequently stayed in the same class over the three years (30% to 46% in each class). Having a hip fracture, self-care impairment, or severe ambulatory limitation increased the odds of leaving No Services, and incontinence and dementia increased the odds of entering VHA-Medicare Care Continuum. Results were similar when restricted to Veterans who survived during all 3 years of the study period. Veterans at high risk of LTIC use a combination of services from across the care continuum and a mix of VHA and Medicare services. Service patterns are relatively stable for 3 years.

PTSD moderates the association between subjective cognitive decline and Alzheimer’s disease biomarkers in older veterans

Objectives Post-traumatic stress disorder (PTSD) and subjective cognitive decline (SCD) are independent risk factors for Alzheimer’s disease (AD) and dementia, but the association of their interaction on AD biomarkers have yet to be characterized. This study aimed to examine the impact of PTSD on the association between SCD and tau and amyloid positron emission tomography (PET) as well as global cognition in older Veterans. Method This study included 87 Vietnam-Era Veterans without dementia (42 with PTSD; 45 without PTSD) from the Department of Defense-Alzheimer’s Disease Neuroimaging Initiative. All participants had both tau and amyloid PET imaging as well as cognitive testing. SCD was measured using the Everyday Cognition questionnaire. Results While SCD was associated with tau PET, amyloid PET, and global cognition, PTSD moderated these associations for tau and amyloid PET levels. Specifically, Veterans without PTSD had a stronger positive relationship between SCD and AD biomarkers when compared to those with PTSD. Conclusion Higher SCD was associated with greater tau and amyloid burden and worse cognitive performance across the sample, though the tau and amyloid associations were stronger for Veterans without PTSD. Results highlight the potential benefit of comprehensive clinical assessments including consideration of mental health among older Veterans with SCD to understand the underlying cause of the cognitive concerns. Additionally, more work is needed to understand alternative mechanisms driving SCD in older Veterans with PTSD.

Glycated Hemoglobin A1c Time in Range and Dementia in Older Adults With Diabetes

Individuals with diabetes commonly experience Alzheimer disease and related dementias (ADRD). Factors such as hypoglycemia, hyperglycemia, and glycemic variability have been associated with increased risk of ADRD. Traditional glycemic measures, such as mean glycated hemoglobin A1c (HbA1c), may not identify the dynamic and complex pathophysiologic factors in the association between diabetes and ADRD. The HbA1c time in range (TIR) is a previously developed measure of glycemic control that expresses HbA1c stability over time within specific ranges. This measure may inform the current understanding of the association between glucose levels over time and ADRD incidence. To examine the association between HbA1c TIR and incidence of ADRD in older veterans with diabetes. The study sample for this cohort study was obtained from administrative and health care utilization data from the Veterans Health Administration and Medicare from January 1, 2004, to December 31, 2018. Veterans 65 years or older with diabetes were assessed. Participants were required to have at least 4 HbA1c tests during the 3-year baseline period, which could start between January 1, 2005, and December 31, 2014. Data analysis was conducted between July and December 2023. Hemoglobin A1c TIR was calculated as the percentage of days during baseline in which HbA1c was in individualized target ranges based on clinical characteristics and life expectancy, with higher HbA1c TIR viewed as more favorable. The association between HbA1c TIR and ADRD incidence was estimated. Additional models considered ADRD incidence in participants who were above or below HbA1c target ranges most of the time. The study included 374 021 veterans with diabetes (mean [SD] age, 73.2 [5.8] years; 369 059 [99%] male). During follow-up of up to 10 years, 41 424 (11%) developed ADRD. Adjusted Cox proportional hazards regression models showed that lower HbA1c TIR was associated with increased risk of incident ADRD (HbA1c TIR of 0 to <20% compared with ≥80%: hazard ratio, 1.19; 95% CI, 1.16-1.23). Furthermore, the direction of out-of-range HbA1c levels was associated with incident ADRD. Having greater time below range (≥60%, compared with ≥60% TIR) was associated with significantly increased risk (hazard ratio, 1.23; 95% CI, 1.19-1.27). Findings remained significant after excluding individuals with baseline use of medications associated with hypoglycemia risk (ie, insulin and sulfonylureas) or with hypoglycemia events. In this study of older adults with diabetes, increased HbA1c stability within patient-specific target ranges was associated with a lower risk of ADRD. Lower HbA1c TIR may identify patients at increased risk of ADRD.

Impact of a Delirium Protocol on Deliriogenic Medication Use in Hospitalized Older Veterans.

Background The Southern Arizona VA Health Care System (SAVAHCS) implemented a delirium prevention and treatment protocol in 2019. Objective The primary objective of this study was to determine if the implementation of a delirium protocol influenced deliriogenic medication use in hospitalized geriatric veterans. The secondary objectives were to compare the rates of delirium diagnosis, hospital length-of-stay, and rates of newly started deliriogenic medications during admission pre- and post-protocol. Methods This study was a retrospective, secondary data analysis study. Veterans 65 years of age and older who were admitted to an inpatient medical ward at the SAVAHCS for 24 hours or more between January 1, 2018 and December 31, 2018 (pre-protocol) or January 1, 2021 and December 31, 2021 (post-protocol) were included. Patients were excluded if they had a diagnosis of alcohol or benzodiazepine withdrawal upon admission. Results A total of 5491 patients were included in this study; 2940 (53.5%) in the pre-protocol group and 2551 (46.5%) in the post-protocol group. Patients received at least one deliriogenic medication during their admission in the post-protocol group (36.2%) compared with the pre-protocol group (34.1%), but there was no statistically significant difference (P = 0.098). There were also no significant differences in the rates of documentation of delirium as a diagnosis at discharge, hospital length-of-stay, or the rates of newly started deliriogenic medications during admission between the groups. Conclusion Implementation of a delirium prevention and treatment protocol at the SAVAHCS did not significantly impact the use of deliriogenic medications in hospitalized geriatric veterans.

Associations of Post-Traumatic Stress Disorder and Objective Subtle Cognitive Difficulties in Cognitively Unimpaired Older Veterans.

Psychiatric conditions such as post-traumatic stress disorder (PTSD) and depression have a two-fold increased dementia risk in Veterans. Prior work has shown that psychiatric factors can both impact cognitive functioning and be early symptoms associated with Alzheimer's disease (AD). Objectively defined subtle cognitive difficulties (Obj-SCD) has been associated with cognitive decline and AD biomarkers. However, Obj-SCD has not yet been investigated in the context of psychiatric disorders. A total of 179 cognitively unimpaired Veterans (50-92years old) underwent a comprehensive neuropsychological evaluation at VA San Diego and a retrospective medical record review. Chi-squared tests compared rates of psychiatric diagnoses in Veterans with and without Obj-SCD. About 21% of the sample was classified as Obj-SCD. Relative to cognitively unimpaired Veterans, Veterans classified as Obj-SCD had higher rates of PTSD, but not higher rates of other psychiatric conditions (e.g., depression). The PTSD findings appear to be driven by measures of cognitive efficiency. Elevated rates of PTSD, but not other psychiatric conditions, were observed among Veterans with Obj-SCD. The prevalence and type of subtle cognitive difficulties associated with PTSD in older Veterans demonstrates a need, and informs potential targets, for intervention. Further work is needed to determine mechanisms of subtle cognitive difficulties in older Veterans with PTSD.