Getting outside the box: exploring role fluidity in interprofessional student groups through the lens of activity theory.

Health professionals' roles and scopes often overlap, creating a need for role clarity in interprofessional teamwork. Yet, such clarity does not mean roles are fixed within teams and some literature suggests role flexibility can enhance team functioning. Interprofessional practice competencies and learning activities often emphasize knowledge and definition of roles, but rarely attend to the dynamic nature of roles and influential contextual factors. This study explores role fluidity in interprofessional student groups using an activity theory framework. Using a collective instrumental case study approach, the authors examine the fluidity of one physical therapy (PT) student's role within 3 different interprofessional (medical, pharmacy, PT) student groups completing nursing home patient care plans. Field notes, group debriefing interviews, and care plans were collected and coded from all care planning sessions. Codes mapped to group-specific activity systems that compared role-influencing interactions and tensions. The PT student's role fluidity varied in each group's activity system, influenced primarily by system tensions from implicit rules (e.g., encouraging questions), division of labor (e.g., rigid profession-based task assignment), and tool use (e.g., computers). Attention to modifiable system elements, such as tool use and explicit rules of inclusivity, could foster role fluidity and improve interprofessional teamwork and learning environments.

Daily consumption of ketone ester, bis-octanoyl (R)-1,3-butanediol, is safe and tolerable in healthy older adults, a randomized, parallel arm, double-blind, placebo-controlled, pilot study.

Objectives: Ketone bodies are endogenous metabolites produced during fasting or a ketogenic diet that have pleiotropic effects on aging pathways. Ketone esters (KEs) are compounds that induce ketosis without dietary changes, but KEs have not been studied in an older adult population. The primary objective of this trial was to determine tolerability and safety of KE ingestion in older adults. Design: Randomized, placebo-controlled, double-blinded, parallel-arm trial, with a 12-week intervention period ( NCT05585762 ). Setting: General community, Northern California, USA. Participants: Community-dwelling older adults, independent in activities of daily living, with no unstable acute medical conditions (n=30) were randomized and n=23 (M= 14, F=9) completed the protocol. Intervention: Participants were randomly allocated to consume either KE (bis-octanoyl (R)-1,3-butanediol) or a taste, appearance, and calorie-matched placebo (PLA) containing canola oil. Measurements: Tolerability was assessed using a composite score from a daily log for 2-weeks, and then via a bi-weekly phone interview. Safety was assessed by vital signs and lab tests at screening and weeks 0, 4 and 12, along with tabulation of adverse events. Results: There was no difference in the prespecified primary outcome of proportion of participants reporting moderate or severe nausea, headache, or dizziness on more than one day in a two-week reporting period (KE n =2 (14.3% [90% CI = 2.6 - 38.5]); PLA n=1 (7.1% [90% CI = 0.4 - 29.7]). Dropouts numbered four in the PLA group and two in the KE group. A greater number of symptoms were reported in both groups during the first two weeks; symptoms were reported less frequently between 2 - 12 weeks. There were no clinically relevant changes in safety labs or vital signs in either group. Conclusions: This KE was safe and well-tolerated in healthy older adults. These results provide a foundation for use of KEs in aging research. Highlights: Ketones esters induce ketosis without dietary changes and may target aging biologyStudies of ketone esters were limited in duration and focused on younger adultsWe found ketone esters were safe and tolerable for 12 weeks in healthy older adults.

A randomized open-label, observational study of the novel ketone ester, bis octanoyl (R)-1,3-butanediol, and its acute effect on ß-hydroxybutyrate and glucose concentrations in healthy older adults.

Bis-octanoyl (R)-1,3-butanediol (BO-BD) is a novel ketone ester (KE) ingredient which increases blood beta-hydroxybutyrate (BHB) concentrations rapidly after ingestion. KE is hypothesized to have beneficial metabolic effects on health and performance, especially in older adults. Whilst many studies have investigated the ketogenic effect of KE in young adults, they have not been studied in an exclusively older adult population, for whom age-related differences in body composition and metabolism may alter the effects. This randomized, observational, open-label study in healthy older adults (n = 30, 50% male, age = 76.5 years, BMI = 25.2 kg/m2) aimed to elucidate acute tolerance, blood BHB and blood glucose concentrations for 4 hours following consumption of either 12.5 or 25 g of BO-BD formulated firstly as a ready-to-drink beverage (n = 30), then as a re-constituted powder (n = 21), taken with a standard meal. Both serving sizes and formulations of BO-BD were well tolerated, and increased blood BHB, inducing nutritional ketosis (≥ 0.5mM) that lasted until the end of the study. Ketosis was dose responsive; peak BHB concentration (Cmax) and incremental area under the curve (iAUC) were significantly greater with 25 g compared to 12.5 g of BO-BD in both formulations. There were no significant differences in Cmax or iAUC between formulations. Blood glucose increased in all conditions following the meal; there were no consistent significant differences in glucose response between conditions. These results demonstrate that both powder and beverage formulations of the novel KE, BO-BD, induce ketosis in healthy older adults, facilitating future research on functional effects of this ingredient in aging.

Awakening: The Unveiling of Historically Unaddressed Social Inequities During the COVID-19 Pandemic in the United States.

The violence and victimization brought by colonization and slavery and justified for over a century by race-based science have resulted in enduring inequities for black, Indigenous and people of color (BIPOC) across the United States. This is particularly true if BIPOC individuals have other intersecting devalued identities. We highlight how such longstanding inequities paved the way for the disproportionate burdens of coronavirus disease 2019 (COVID-19) among the BIPOC populations across the country and provide recommendations on how to improve COVID-19 mitigation strategies with the goal of eliminating disparities.

Fostering Interprofessional Geriatric Patient Care Skills for Health Professions Students Through a Nursing Facility-Based Immersion Rotation.

Introduction: Interprofessional (IP) clinical care is ideally taught in authentic environments; however, training programs often lack authentic opportunities for health professions students to practice IP patient care. Skilled nursing facilities (SNFs) can offer such opportunities, particularly for geriatric patient care, but are underutilized as training sites. We present an IP nursing facility rotation (IP-SNF) in which medical, pharmacy, and physical therapy students provided collaborative geriatric patient care. Methods: Our 10-day immersion rotation focused on four geriatric competencies common to all three professions: appropriate/hazardous medications, patient self-care capacity, evaluating and treating falls, and IP collaboration. Activities included conducting medication reviews, quarterly care planning, evaluating functional status/fall risk, and presenting team recommendations at SNF meetings. Facility faculty/staff provided preceptorship and assessed team presentations. Course evaluations included students' pre/post objective-based self-assessment, as well as facility faculty/staff evaluations of interactions with students. Results: Thirty-two students (15 medical, 12 pharmacy, five physical therapy) participated in the first 2 years. Evaluations (n = 31) suggested IP-SNF filled gaps in students' geriatrics and IP education. Pre/post self-assessment showed significant improvement (p < .001) in self-confidence related to course objectives. Faculty/staff indicated students added value to SNF patient care. Challenges included maximizing patient care experiences while allowing adequate team work time. Discussion: IP-SNF showcases the feasibility of, and potential for, engaging learners in real-world IP geriatric patient care in a SNF. Activities and materials must be carefully designed and implemented to engage all levels/types of IP learners and ensure valuable learning experiences.

A new Mentor Evaluation Tool: Evidence of validity.

BACKGROUND: Mentorship plays an essential role in enhancing the success of junior faculty. Previous evaluation tools focused on specific types of mentors or mentees. The main objective was to develop and provide validity evidence for a Mentor Evaluation Tool (MET) to assess the effectiveness of one-on-one mentoring for faculty in the academic health sciences. METHODS: Evidence was collected for the validity domains of content, internal structure and relationship to other variables. The 13 item MET was tested for internal structure evidence with 185 junior faculty from Schools of Dentistry, Medicine, Nursing, and Pharmacy. Finally, the MET was studied for additional validity evidence by prospectively enrolling mentees of three different groups of faculty (faculty nominated for, or winners of, a lifetime achievement in mentoring award; faculty graduates of a mentor training program; and faculty mentors not in either of the other two groups) at the University of California San Francisco (UCSF) and asking them to rate their mentors using the MET. Mentors and mentees were clinicians, educators and/or researchers. RESULTS: The 13 MET items mapped well to the five mentoring domains and six competencies described in the literature. The standardized Cronbach's coefficient alpha was 0.96. Confirmatory factor analysis supported a single factor (CFI = 0.89, SRMR = 0.05). The three mentor groups did not differ in the single overall assessment item (P = 0.054) or mean MET score (P = 0.288), before or after adjusting for years of mentoring. The mentorship score means were relatively high for all three groups. CONCLUSIONS: The Mentor Evaluation Tool demonstrates evidence of validity for research, clinical, educational or career mentors in academic health science careers. However, MET did not distinguish individuals nominated as outstanding mentors from other mentors. MET validity evidence can be studied further with mentor-mentee pairs and to follow prospectively the rating of mentors before and after a mentorship training program.

Reduced adipogenic gene expression in thigh adipose tissue precedes human immunodeficiency virus-associated lipoatrophy.

CONTEXT: The expression of adipogenic genes in sc adipose tissue has been reported to be lower among patients with HIV-associated lipoatrophy than HIV-uninfected controls. It is unclear whether this is a result or cause of lipoatrophy. OBJECTIVE: The objective of the study was to investigate the temporal relationships among changes in adipogenic gene expression in sc adipose tissue and changes in body fat distribution and metabolic complications in HIV-infected subjects on antiretroviral therapy. DESIGN: This was a prospective longitudinal study. SETTING: The study was conducted at HIV clinics in Seattle, Washington. PARTICIPANTS: The study population included 31 HIV-infected and 12 control subjects. INTERVENTIONS: Subjects were followed up for 12 months after they initiated or modified their existing antiretroviral regimen. MAIN OUTCOME MEASURES: Changes in body composition, plasma lipids, insulin sensitivity, and gene expression in sc abdominal and thigh adipose tissue. RESULTS: Subjects who developed lipoatrophy (n=10) had elevated fasting triglycerides [3.16 (sd 2.79) mmol/liter] and reduced insulin sensitivity as measured by frequently sampled iv glucose tolerance test [1.89 (sd 1.27)x10(-4) min(-1)/microU.ml] after 12 months, whereas those without lipoatrophy (n=21) did not show any metabolic complications [triglycerides 1.32 (sd 0.58) mmol/liter, P=0.01 vs. lipoatrophy; insulin sensitivity 3.52 (sd 1.91)x10(-4) min(-1)/microU.ml, P=0.01 vs. lipoatrophy]. In subjects developing lipoatrophy, the expression of genes involved in adipocyte differentiation, lipid uptake, and local cortisol production in thigh adipose tissue was significantly reduced already at the 2-month visit, several months before any loss of extremity fat mass was evident. CONCLUSIONS: In HIV-infected subjects, lipoatrophy is associated with elevated fasting triglycerides and insulin resistance and might be caused by a direct or indirect effect of antiretroviral drugs on sc adipocyte differentiation.

Effect of aging on the response of ghrelin to acute weight loss.

OBJECTIVES: To determine whether the failure of the orexigenic hormone ghrelin to increase as it normally does with weight loss contributes to impaired weight recovery in older persons. DESIGN: Prospective diet intervention study. SETTING: University of Washington Medical Center from 2001 through 2005. PARTICIPANTS: Twenty-one younger (18-35) and 18 older (> or =70) men and women. INTERVENTION: Two weeks of a weight-maintaining diet were followed in sequence by 2 weeks of 30% calorie restriction, then 4 weeks of ad libitum food intake. MEASUREMENTS: Twenty-four-hour plasma ghrelin levels, dual x-ray absorptiometry scan for body composition, resting energy expenditure, and calorie intakes were measured. RESULTS: Both younger and older subjects lost weight with calorie restriction and failed to fully regain their baseline weight. The older adults trended toward increasing their calorie intake above their baseline level during the ad libitum period (111+/-66 kcal, P=.11), whereas the younger individuals did not (-236+/-95 kcal, P=.02). There was no statistically significant difference between the two cohorts in 24-hour ghrelin levels before or after calorie restriction. Ghrelin levels in the two cohorts increased equivalently after calorie restriction and decreased after ad libitum food consumption resumed. CONCLUSION: Ghrelin levels in healthy older individuals respond appropriately in a compensatory manner to changes in body weight and calorie intake.

Geriatric syndromes and geriatric assessment for the generalist.

Geriatric assessment is an increasingly important area of outpatient medicine, given the unprecedented aging of the US population. Screening and evaluation for geriatric syndromes, particularly falls, urinary incontinence, frailty, and cognitive impairment, are crucial aspects of outpatient geriatric assessment. Innovative models of care are emerging to improve quality of care and enhance cost savings for the geriatric patient. High-value features of geriatric care systems include providing increased 24/7 access to care, a multidisciplinary team-based approach to care, performing medication reconciliation and comprehensive geriatric assessments, and integrating palliative care into treatment planning.

Leptin levels are appropriate for body mass index in older men who experience involuntary weight loss.

OBJECTIVES: To determine the relationship between leptin and unintentional weight loss in older adults. DESIGN: Prospective cohort study over 2 years. SETTING: University-affiliated Veterans Affairs Medical Center. PARTICIPANTS: The subjects were 105 community-dwelling male veterans aged 65 and older who had participated in a prospective cohort study on nutrition and health conducted at the Veterans Affairs Puget Sound Health Care System from 1986 to 1989. MEASUREMENTS: Anthropometric data and fasting blood specimens were collected at baseline and annually for the subsequent 2 years. Stored blood specimens were analyzed for leptin, insulin, glucose, C-reactive protein, sex hormone binding globulin, and testosterone levels. RESULTS: Over 2 years, 75 men were weight stable (weight loss <4% of baseline) and 30 men had unintentional weight loss (weight loss>4% of baseline). The baseline body mass index (BMI) and leptin levels for the two groups were not statistically different. Positive correlations existed between leptin level and BMI at each time point for weight-stable and weight-loss subjects. Furthermore, a significant relationship existed between changes in leptin and changes in BMI over 1 year in multiple regression analysis (r =.436, P <.001 after the first year; and r =.630, P =.027 after the second year). CONCLUSIONS: Like in younger adults, plasma leptin levels remained proportional to BMI, and changes in BMI were accurately reflected by changes in leptin levels in older individuals. Fasting leptin levels did not predict involuntary weight loss over 2 years of follow-up.

Teaching geriatric fellows how to teach: a needs assessment targeting geriatrics fellowship program directors.

The entire healthcare workforce needs to be educated to better care for older adults. The purpose of this study was to determine whether fellows are being trained to teach, to assess the attitudes of fellowship directors toward training fellows to be teachers, and to understand how to facilitate this type of training for fellows. A nine-question survey adapted from a 2001 survey issued to residency program directors inquiring about residents-as-teachers curricula was developed and administered. The survey was issued electronically and sent out three times over a 6-week period. Of 144 ACGME-accredited geriatric fellowship directors from geriatric, internal medicine, and family medicine departments who were e-mailed the survey, 101 (70%) responded; 75% had an academic affiliation, 15% had a community affiliation, and 10% did not report. Academic and community programs required their fellows to teach, but just 55% of academic and 29% of community programs offered teaching skills instruction as part of their fellowship curriculum; 67% of academic programs and 79% of community programs felt that their fellows would benefit from more teaching skill instruction. Program directors listed fellow (39%) and faculty (46%) time constraints as obstacles to creation and implementation of a teaching curriculum. The majority of fellowship directors believe that it is important for geriatric fellows to become competent educators, but only approximately half of programs currently provide formal instruction in teaching skills. A reproducible, accessible curriculum on teaching to teach that includes a rigorous evaluation component should be created for geriatrics fellowship programs.

Evaluating the association of preoperative functional status and postoperative functional decline in older patients undergoing major surgery.

This prospective cohort study sought to identify predictors of functional decline in patients aged 65 years or older who underwent major, nonemergent abdominal or thoracic surgery in our tertiary hospital from 2006 to 2008. We used the Stanford Health Assessment Questionnaire-Disability Index (HAQ-DI) to evaluate functional decline; a 0.1 or greater increase was used to indicate a clinically significant decline. The preoperative Duke Activity Status Index (DASI) and a physical function score (PFS), assessing gait speed, grip strength, balance, and standing speed, were evaluated as predictors of decline. We enrolled 215 patients (71.2 ± 5.2 years; 56.7% female); 204 completed follow-up HAQ assessments (71.1 ± 5.3 years; 57.8% female). A significant number of patients had functional decline out to 1 year. Postoperative HAQ-DI increases of 0.1 or greater occurred in 45.3 per cent at 1 month, 30.1 per cent at 3 months, and 28.3 per cent at 1 year. Preoperative DASI and PFS scores were not predictors of functional decline. Male sex at 1 month (odds ratio [OR], 3.05; 95% confidence interval [CI], 1.41 to 6.85); American Society of Anesthesiologists class (OR, 3.41; 95% CI, 1.31 to 8.86), smoking (OR, 3.15; 95% CI, 1.27 to 7.85), and length of stay (OR, 1.09; 95% CI, 1.01 to 1.16) at 3 months; and cancer diagnosis at 1 year (OR, 2.6; 95% CI, 1.14 to 5.96) were associated with functional decline.

Identification of radiation-induced expression changes in nonimmortalized human T cells.

In the event of a radiation accident or attack, it will be imperative to quickly assess the amount of radiation exposure to accurately triage victims for appropriate care. RNA-based radiation dosimetry assays offer the potential to rapidly screen thousands of individuals in an efficient and cost-effective manner. However, prior to the development of these assays, it will be critical to identify those genes that will be most useful to delineate different radiation doses. Using global expression profiling, we examined expression changes in nonimmortalized T cells across a wide range of doses (0.15-12 Gy). Because many radiation responses are highly dependent on time, expression changes were examined at three different times (3, 8, and 24 h). Analyses identified 61, 512 and 1310 genes with significant linear dose-dependent expression changes at 3, 8 and 24 h, respectively. Using a stepwise regression procedure, a model was developed to estimate in vitro radiation exposures using the expression of three genes (CDKN1A, PSRC1 and TNFSF4) and validated in an independent test set with 86% accuracy. These findings suggest that RNA-based expression assays for a small subset of genes can be employed to develop clinical biodosimetry assays to be used in assessments of radiation exposure and toxicity.

Peripheral ghrelin treatment stabilizes body weights of senescent male Brown Norway rats at baseline and after surgery.

Unintentional weight loss may occur spontaneously in older humans and animals. Further weight losses after surgery or illness in the older patients result in increased morbidity, mortality, and hospital readmission rate. A growing body of work has shown increased appetite and weight gain in response to administration of ghrelin, the "hunger hormone." We conducted two studies in senescent male Brown Norway rats to assess the ability of peripheral administration of ghrelin to increase body weight and food intake. One study assessed the effect of 2 wk of daily subcutaneous ghrelin administration (1 mg.kg(-1).day(-1)) to senescent rats in a baseline condition; a second study used the same administration protocol in an interventional experiment with aged rats subjected to a surgery with 10-15% blood loss as a model of elective surgery. In both studies, animals receiving ghrelin maintained their body weights, whereas control animals lost weight. Body weight stability was achieved in ghrelin-treated animals despite a lack of increase in daily or cumulative food intake in both experiments. Hormone and proinflammatory cytokine levels were measured before surgery and after 14 days of treatment. Ghrelin treatment appeared to blunt declining ghrelin levels and also to blunt cytokine increases seen in the surgical control group. The ability of peripheral ghrelin treatment to maintain body weights of senescent rats without concomitant increases in food intake may be due to its known ability to decrease sympathetic activity and metabolic rate, perhaps by limiting cytokine-driven inflammation.

Modeling the impact of COPD on the brain.

Previous studies have shown that COPD adversely affects distant organs and body systems, including the brain. This pilot study aims to model the relationships between respiratory insufficiency and domains related to brain function, including low mood, subtly impaired cognition, systemic inflammation, and brain structural and neurochemical abnormalities. Nine healthy controls were compared with 18 age- and education-matched medically stable-COPD patients, half of whom were oxygen-dependent. Measures included depression, anxiety, cognition, health status, spirometry, oximetry at rest and during 6-minute walk, and resting plasma cytokines and soluble receptors, brain MRI, and MR spectroscopy in regions relevant to mood and cognition. ANOVA was used to compare controls with patients and with COPD subgroups (oxygen users [n = 9] and nonusers [n = 9]), and only variables showing group differences at p < or = 0.05 were included in multiple regressions controlling for age, gender, and education to develop the final model. Controls and COPD patients differed significantly in global cognition and memory, mood, and soluble TNFR1 levels but not brain structural or neurochemical measures. Multiple regressions identified pathways linking disease severity with impaired performance on sensitive cognitive processing measures, mediated through oxygen dependence, and with systemic inflammation (TNFR1), related through poor 6-minute walk performance. Oxygen desaturation with activity was related to indicators of brain tissue damage (increased frontal choline, which in turn was associated with subcortical white matter attenuation). This empirically derived model provides a conceptual framework for future studies of clinical interventions to protect the brain in patients with COPD, such as earlier oxygen supplementation for patients with desaturation during everyday activities.

What is the Optimal Duration of Participation in a Community-Based Health Promotion Program for Older Adults?

Optimizing duration of participation in health promotion programs has important implications for program reach and costs. We examined data from 355 participants in EnhanceWellness (EW) to determine whether improvements in disability risk factors (depression, physical inactivity) occurred early or late in the enrollment period. Participants had a mean age of 74 years; 76% were women, and 16% were non-white. The percent depressed declined from enrollment to six months (35% to 28%, p = .001) and from six to 12 months (28% to 22%, p = .03). The percent physically inactive declined over the first six months, without substantial change thereafter (47%, 29%, and 29%). Those remaining inactive at six months had worse self-rated health and more depressive symptoms initially; a subset of those increased their physical activity by 12 months. These data suggest that enrollment could be reduced from 12 to six months without compromising favorable effects of EW participation, although additional benefits may accrue beyond six months.

Body mass index and C-reactive protein in the healthy Korean aged men.

The purpose of this study was to determine the relationship between plasma C-reactive protein (CRP) and body mass index (BMI) in elderly Korean men. A review of routine health examination records were done. Out of 671 eligible elderly men, who had their routine health examination in 2001 at a Health Promotion Center of a university hospital, 367 subjects were included after excluding inflammatory conditions. Subgroup analyses were performed on those who did not smoke and exercised regularly. Body composition, blood pressure, blood samples and radiologic examinations including chest radiography and abdominal ultrasound were obtained from each subject. Age, BMI, current smoking, regular exercise, WBC count, HDL-cholesterol, gamma glutamyl transferase were independently associated with logCRP. BMI subgroups according to the Asia-Pacific guideline did not show any difference in CRP level from each other by ANCOVA (p>0.05). However, BMI groups subdivided according to our criteria showed an association with CRP; the CRP level was lowest in the group of BMI between 18.5-19.4 and showed significant difference from BMI group of the highest BMI group (>or=29.0). Since elevated CRP levels are associated with higher risk for cardiovascular disease, lower BMI (18.5-19.4) levels may be advised for healthy elderly men in Korea.