Publications by authors named "McGrath R"

Background: Handgrip strength (HGS) is an excellent marker of general strength capacity and health among adults. We aimed to calculate temporal trends in HGS for adults from Shanghai between 2000 and 2020.

Methods: Adults aged 20-59 years from Shanghai, China, were included.

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Kieser, J, Langford, M, Stover, E, Tomkinson, GR, Clark, BC, Cawthon, PM, and McGrath, R. Absolute agreement between subjective hand squeeze and objective handgrip strength in adults. J Strength Cond Res 39(1): 16-23, 2025-Despite handgrip strength (HGS) being considered a convenient muscle strength assessment, HGS lacks routine measurement in sports medicine and healthcare settings because barriers such as time and lack of instrumentation may exist.

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  • Muscular strength, particularly measured by handgrip strength (HGS), is an important indicator of health and a predictor of age-related diseases, but no international benchmarks exist for HGS across different ages and sexes.
  • The study systematically analyzed data from over 2.4 million adults across 69 countries to establish sex- and age-specific norms for HGS, identifying a peak in strength between ages 30 and 39 before a gradual decline.
  • Findings revealed that while absolute and body size-normalized HGS improves slightly in early adulthood, a more significant drop occurs from middle to late adulthood, with males generally experiencing a faster decline than females.
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Background: High variations in serially measured blood pressures (BPs) portend a variety of adverse clinical events including dementia, cardiovascular sequelae and frailty. In this study, systolic blood pressure variability (BPV) was examined for its association with fall frequency and time to next fall among older adults living in nursing homes.

Methods: BP values and falls over time were extracted from medical records of nursing home residents aged ≥65 years over a 10-month period.

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  • The case study describes a patient with chronic myelomonocytic leukemia (CMML) who experienced sudden orbital inflammation, leading to significant eye issues like bulging (proptosis) and increased eye pressure.
  • Despite initial treatments not working, the patient's condition improved quickly after starting intravenous steroids.
  • The case highlights that CMML, although rare, can cause orbital inflammation and suggests it should be considered in patients with ongoing high levels of monocytes.
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Objectives: Female athletes who experience childbirth during their athletic careers can expect to return to elite sports postpartum and perform at a comparable or improved level. However, mothering athletes often encounter significant barriers when re-entering elite sports. The aim of this study was to explore the experiences of a geographically diverse group of mothering athletes who returned to elite sports after childbirth.

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  • The systematic review investigated the impact of maxillofacial reconstruction with dental implants on quality of life (QoL), comparing it to no dental rehabilitation and other options like removable dentures.
  • After analyzing 2735 studies, only three were included, suggesting that maxillofacial reconstruction improved QoL, but they had a high risk of bias due to confounding factors.
  • The review found that existing QoL measurement tools were not sufficiently relevant for maxillofacial patients, emphasizing the need for tailored instruments to better assess their quality of life.
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Background: People with severe mental illness (SMI) have worse physical health than the general population. There is evidence that support from volunteers can help the mental health of people with SMI, but little evidence regarding the support they can give for physical health.

Aims: To evaluate the feasibility of an intervention where volunteer 'Health Champions' support people with SMI in managing their physical health.

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Objective: This study estimates and compares variation in the probability of child unmet need for mental health care and difficulties accessing care for each state in the United States. Estimates are also generated and compared for three socioeconomic and demographic subgroups nationwide: racial and ethnic group, household income, and insurance type.

Methods: Using a retrospective, cross-sectional design, this study pooled 2016-2019 National Survey of Children's Health data.

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Background: Ophthalmology consultation on inpatients is often important to optimise eye care and provide information for referring teams. Inpatient consultation may constitute a not-insignificant workload however. This study reports on the nature and necessity of ophthalmology inpatient consults in a large Irish hospital.

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  • - The study aimed to compare the effectiveness of objectively measured cardiorespiratory fitness (CRF) versus exercise- and non-exercise-estimated CRF in predicting all-cause and cardiovascular disease (CVD) mortality among adults.
  • - A systematic review analyzed 42 cohort studies involving over 3.8 million participants, finding similar risk reductions in mortality linked to higher levels of CRF regardless of the measurement method used.
  • - The results indicated that both objectively measured and estimated CRF are valid indicators of mortality risk, with minimal differences in their predictive capabilities.
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  • Electronic handgrip dynamometry was used to measure various aspects of muscle function in both upper and lower extremities among resistance-trained adults, but the links between these muscle functions were previously unknown.
  • A study involving 30 adults found that strength was significantly correlated between dominant limbs for both upper (r = 0.76) and lower (r = 0.67) extremities, indicating that handgrip strength may reflect overall muscle strength.
  • The research highlighted that while strength correlations were common across age groups, differences emerged in RFD and endurance, suggesting that handgrip dynamometry could serve as a valuable tool for assessing muscle function in diverse populations.
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Objective: to establish whether torque pulses ap-plied by an exoskeleton to the hip and knee joint modulate propulsion mechanics and whether changes in propulsion me-chanics are sustained after exposure to torque pulses under user-driven treadmill control.

Methods: we applied twelve for-mulations of torque pulses consecutively over 300 strides to 22 healthy participants, and quantified the evolution of four outcome measures - gait speed (GS), hip extension (HE), trailing limb angle (TLA), normalized propulsive impulse (NPI) - before, during, and immediately after training.

Results: Metrics of propulsion mechanics significantly changed both during and after training.

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Background: Older people can experience health and social challenges such as loneliness, depression, and lack of social connectedness. There is need for programs and approaches that address the growing incidence of social isolation and loneliness for older people. One initiative that aims to address these challenges is the Sporting Memories program.

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Although perceived control is a well-established predictor of cognitive aging, less is known about how and under what developmental circumstances these beliefs about personal influence may protect against cognitive declines. Our study examined light physical activity (LPA) as an unexplored mechanism that may link changes in two facets of perceived control (personal mastery, perceived constraints) to longitudinal trajectories of cognitive functioning. We also examined whether mediated pathways were moderated by age (i.

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  • The study evaluated how handgrip strength, measured in older Americans, is linked to the risk of developing diabetes over time, distinguishing between absolute strength and strength normalized to body size.
  • It found that individuals with weaker handgrip strength, especially when adjusted for body weight and BMI, had a significantly higher chance of developing diabetes, while absolute strength did not show a meaningful association.
  • The results suggest that muscle strength, rather than just body size, plays a crucial role in the risk of diabetes, highlighting the importance of maintaining strength in older adults.
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This study aimed to compare patient outcomes between prescribing psychologists, psychiatrists, and primary care physicians (PCPs). Private insurance claims (2005-2021; = 307,478) were used to conduct an active comparator, new user longitudinal cohort study developed using target trial emulation. Inverse propensity for treatment weighting was used to adjust for baseline differences in a range of sociodemographic, clinical, and contextual patient factors.

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Background: Assessment of eating disorders (ED) in youth relies heavily on self-report, yet persistent lack of recognition of the presence and/or seriousness of symptoms can be intrinsic to ED. This study examines the psychometric properties of a semi-structured interview, the parent version of the Eating Disorder Examination (PEDE), developed to systematically assess caregiver report of symptoms.

Methods: A multi-site, clinical sample of youth (N = 522; age range: 12 to 18 years) seeking treatment for anorexia nervosa (AN) and subsyndromal AN were assessed using the Eating Disorder Examination (EDE) for youth and the PEDE for collateral caregiver report.

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To examine the association between scope-of-practice (SoP) regulations and racial disparities in pediatric mental health services. We used the National Survey of Children's Health (2016-2020; n = 33,790) to examine racial disparities in unmet mental health care needs and receipt of mental health medication between states with and without SoP expansions for psychologists and nurse practitioners (NP). Our primary outcomes were (1) unmet mental health care needs and (2) receipt of mental health medication.

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Aims: To examine the associations of 1) absolute and normalized weakness cut-points, 2) collective weakness categories, and 3) changes in weakness status on future activities of daily living (ADL) limitations in older Americans.

Methods: The analytic sample included 11,656 participants aged ≥65-years from the 2006-2018 waves of the Health and Retirement Study. ADL were self-reported.

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Objectives: Scientific evidence provides a widened view of differences in immune response between male and female neonates. The X-chromosome codes for several genes important in the innate immune response and neonatal innate immune cells express receptors for, and are inhibited by, maternal sex hormones. We hypothesized that sex differences in innate immune responses may be present in the neonatal population which may contribute to the increased susceptibility of premature males to sepsis.

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  • Bone stress injuries are common in athletes and military recruits, affecting their training, prompting the development of an ankle-foot orthosis to lessen tibial strain for quicker recovery.
  • A robotic leg was created to test how tibial strain varies with different orthotic conditions, using a dual actuation system that simulates the muscle forces in the leg.
  • Initial results show that while strain measurements are consistent across tests, they do not fully align with real-life data, indicating the need for further improvements for accurate scalability and insights into exoskeletal design for preventing bone stress injuries.
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Background: Weakness can be operationalized with several thresholds, which in turn, could impact associations with cognitive impairment when considering obesity status.

Objective: We examined the associations of absolute, normalized, and collective weakness thresholds on future cognitive impairment by obesity status in older adults.

Methods: We performed a secondary data analysis on the 2006-2018 waves of the Health and Retirement Study.

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  • This study analyzed the characteristics of 307,478 patients in New Mexico and Louisiana who received psychotropic medications from various prescribers (psychologists, psychiatrists, and primary care physicians) between 2004 and 2021.
  • Patients with bipolar disorder and schizophrenia were more likely to see specialists, particularly if they had recent psychotherapy visits. Prescribing psychologists notably treated patients similar to psychiatrists but showed a preference for prescribing antidepressants over antipsychotics.
  • Primary care physicians generally prescribed fewer psychotropic medications, with exceptions for antidepressants and anxiolytics, highlighting the varying prescribing patterns among different types of prescribers.
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