Medicine and Health Sciences Commons^™

Arterial Stiffness And Obesity As Predictors Of Diabetes: Longitudinal Cohort Study, Cancan Cui, Zhiyuan Wu, Jia Zheng, Jiaqi Chu, Jiajing Zhu, Yitian Qi, Zhenming Zhang, Zhijia Wang, Mengchao Zhang, Zhanhao Mo, Liangkai Cheng, Lei Ding, Xiaoping Kang, Lin Liu, Te Zhang

Research outputs 2022 to 2026

BACKGROUND: Previous studies have confirmed the separate effect of arterial stiffness and obesity on type 2 diabetes; however, the joint effect of arterial stiffness and obesity on diabetes onset remains unclear. OBJECTIVE: This study aimed to propose the concept of arterial stiffness obesity phenotype and explore the risk stratification capacity for diabetes. METHODS: This longitudinal cohort study used baseline data of 12,298 participants from Beijing Xiaotangshan Examination Center between 2008 and 2013 and then annually followed them until incident diabetes or 2019. BMI (waist circumference) and brachial-ankle pulse wave velocity were measured to define arterial stiffness abdominal obesity phenotype. The …

Living With Myocardial Ischaemia And No Obstructive Coronary Arteries: A Qualitative Study, Helen Humphreys, Danielle Paddock, Sarah Brown, Colin Berry, Aynsley Cowie, Susan Dawkes, Simon Nichols

Research outputs 2022 to 2026

Objective To explore the lived experience of people with myocardial ischaemia with no obstructive arteries. Design Qualitative study using semistructured interviews. Setting Telephone interviews with 17 participants living in the UK. Participants 17 people (2 males, 15 females; aged 31–69 years) with a presumed or confirmed diagnosis of myocardial ischaemia with no obstructive arteries, recruited via social media and online patient-led support forums. Results Five themes were generated. Theme 1 describes the wide range of experiences that participants described, particularly the frequency and intensity of symptoms, and the uncertainty and fear that symptoms commonly provoked. Theme 2 describes the major …

Assessing Suboptimal Health Status In The Saudi Population: Translation And Validation Of The Shsq-25 Questionnaire, Mohamed A. Alzain, Collins O. Asweto, Sehar-Un-Nisa Hassan, Mohammed E. Saeed, Ahmed Kassar, Kamal E. M. Ali, Mouna Ghorbel, Rafat Zrieq, Bandar Alsaif, Wei Wang

Research outputs 2022 to 2026

Background: Suboptimal Health Status (SHS) is realised as a vital feature for improving global health. However, the Arabian world does not have a validated instrument for screening SHS in their population. Therefore, the study aimed to evaluate the psychometric properties of Arabic-translated SHS (ASHSQ-25) in the Saudi Arabian population. Methods: We conducted a cross-sectional study among the conveniently sampled 1590 participants from the Saudi population (with a 97.4% response rate). The data was gathered through an online survey and then exported into SPSS and AMOS version 26.0 for analysis. Mann-Whitney and Kruskal-Wallis tests were used to identify the median difference …

Edsuch: A Robust Ensemble Data Summarization Method For Effective Medical Diagnosis, Mohiuddin Ahmed, A. N. M. B. Rashid

Research outputs 2022 to 2026

Identifying rare patterns for medical diagnosis is a challenging task due to heterogeneity and the volume of data. Data summarization can create a concise version of the original data that can be used for effective diagnosis. In this paper, we propose an ensemble summarization method that combines clustering and sampling to create a summary of the original data to ensure the inclusion of rare patterns. To the best of our knowledge, there has been no such technique available to augment the performance of anomaly detection techniques and simultaneously increase the efficiency of medical diagnosis. The performance of popular anomaly detection …

Analysis Of The Outer Retinal Bands In Abca4 And Prph2-Associated Retinopathy Using Oct, Rachael C. Heath Jeffery, Johnny Lo, Jennifer A. Thompson, Tina M. Lamey, Terri L. Mclaren, John N. De Roach, Lauren N. Ayton, Andrea L. Vincent, Abhishek Sharma, Fred K. Chen

Research outputs 2022 to 2026

Purpose: To evaluate the outer retinal bands using OCT in ABCA4- and PRPH2-associated retinopathy and develop a novel imaging biomarker to differentiate between these 2 genotypes. Design: Multicenter case-control study. Participants: Patients with a clinical and genetic diagnosis of ABCA4- or PRPH2-associated retinopathy and an age-matched control group. Methods: Macular OCT was used to measure the thickness of the outer retinal bands 2 and 4 by 2 independent examiners at 4 retinal loci. Main Outcome Measures: Outcome measures included the thicknesses of band 2, band 4, and the band 2/band 4 ratio. Linear mixed modeling was used to make comparisons …

Challenging The Nuances Of Pain Assessment With Co-Designed Audio-Visual Simulations In Nursing Education: A Descriptive Study, Michelle A. Kelly, Susan Slatyer, Naomi Tutticci, Joanne Ramsbotham, Sandra Johnston, Irene Ngune, Karen A. Theobald

Research outputs 2022 to 2026

Background: Appropriate management of pain remains a challenging issue. Surfacing nurses’ inherent assumptions about pain may lead to better pain management. This study developed and evaluated new audio-visual (AV) simulations for nursing students showcasing patient characteristics that may influence pain assessment. Methods: Descriptive pre/post intervention study informed by the STROBE framework. Participants were drawn from two Australian universities. Three AV simulations were codesigned by clinicians, educators, and health consumers. Data included: demographics, previous experiences of pain assessment; compassion scale, feasibility, and relevance of AV simulations. Quantile regression and content analyses were applied. Results: Full data sets of 491 participants (314 …

Failure To Progress Or Just Normal? A Constructivist Grounded Theory Of Physiological Plateaus During Childbirth, Marina Weckend, Kylie Mccullough, Christine Duffield, Sara Bayes, Clare Davison

Research outputs 2022 to 2026

Background and problem: During childbirth, one of the most common diagnoses of pathology is ‘failure to progress’, frequently resulting in labour augmentation and intervention cascades. However, failure to progress is poorly defined and evidence suggests that some instances of slowing, stalling and pausing labour patterns may represent physiological plateaus. Aim: To explore how midwives conceptualise physiological plateaus and the significance such plateaus may have for women's labour trajectory and birth outcome. Methods: Twenty midwives across Australia participated in semi-structured interviews between September 2020 and February 2022. Constructivist grounded theory methodology was applied to analyse data, including multi-phasic coding and application …

The Psychosocial Beliefs, Experiences And Expectations Of Children Living With Obesity, Lisa Newson, Nicola Sides, Amineh Rashidi

Research outputs 2022 to 2026

Background: Childhood obesity has been shown to impair psychological health. However, psychological factors are often overlooked in both research evaluations and treatment interventions, and children's perspectives on managing obesity are underexplored. Neglecting psychosocial factors might undermine interventions. This research explored the psychological beliefs, expectations and experiences of children living with obesity (range 7–13) and attending a weight management programme (WMP). Methods: Thirty-four participants (19 females, 15 males, average age 9.5 years) completed a semistructured interview. Recorded interviews were transcribed verbatim and analysed using thematic analysis. Results: Four overarching themes were developed: (1) defining health and self-recognition; (2) external influence; feedback, …

Dropout From Exercise Trials Among Cancer Survivors—An Individual Patient Data Meta-Analysis From The Polaris Study, Benedikte Western, Andreas Ivarsson, Ingvild Vistad, Ingrid Demmelmaier, Neil K. Aaronson, Gillian Radcliffe, Marc Van Beurden, Martin Bohus, Kerry S. Courneya, Amanda J. Daley, Daniel A. Galvão, Rachel Garrod, Martine M. Goedendorp, Kathleen A. Griffith, Wim H. Van Harten, Sandi C. Hayes, Fernando Herrero-Roman, Anouk E. Hiensch, Melinda L. Irwin, Erica James, Marlou-Floor Kenkhuis, Marie J. Kersten, Hans Knoop, Alejandro Lucia, Anne M. May, Alex Mcconnachie, Willem Van Mechelen, Nanette Mutrie, Robert U. Newton, Frans Nollet, Hester S. Oldenburg, Ron Plotnikoff, Martina E. Schmidt, Katie H. Schmitz, Karl-Heinz Schulz, Camille E. Short, Gabe S. Sonke, Karen Steindorf, Martijn M. Stuiver, Dennis R. Taaffe, Lene Thorsen, Miranda J. Velthuis, Jennifer Wenzel, Kerri M. Winters-Stone, Joachim Wiskemann, Sveinung Berntsen, Laurien M. Buffart

Research outputs 2022 to 2026

Introduction: The number of randomized controlled trials (RCTs) investigating the effects of exercise among cancer survivors has increased in recent years; however, participants dropping out of the trials are rarely described. The objective of the present study was to assess which combinations of participant and exercise program characteristics were associated with dropout from the exercise arms of RCTs among cancer survivors. Methods: This study used data collected in the Predicting OptimaL cAncer RehabIlitation and Supportive care (POLARIS) study, an international database of RCTs investigating the effects of exercise among cancer survivors. Thirty-four exercise trials, with a total of 2467 patients …

The Role Of Diet And Gut Microbiota In Alzheimer’S Disease, D. M.Sithara Dissanayaka, Vijay Jayasena, Stephanie R. Rainey-Smith, Ralph N. Martins, W. M.A.D.Binosha Fernando

Research outputs 2022 to 2026

Alzheimer’s disease (AD), the most prevalent form of dementia, is characterized by the accumulation of amyloid-beta (A ) plaques and hyperphosphorylated tau tangles. Currently, Alzheimer’s disease (AD) impacts 50 million individuals, with projections anticipating an increase to 152 million by the year 2050. Despite the increasing global prevalence of AD, its underlying pathology remains poorly understood, posing challenges for early diagnosis and treatment. Recent research suggests a link between gut dysbiosis and the aggregation of A , the development of tau proteins, and the occurrence of neuroinflammation and oxidative stress are associated with AD. However, investigations into the gut–brain axis …

Pre-Eclampsia Training Needs Of Midwives In A Ghanaian Tertiary Hospital: A Cross-Sectional Study, Isabella Garti, Michelle Gray, Angela Bromley, Jing-Yu (Benjamin) Tan

Research outputs 2022 to 2026

Aim: This study aimed to assess the specific clinical and non-clinical training needs of midwives and determine their preferred approach to enhancing performance. Background: Pre-eclampsia remains one of the leading causes of maternal deaths in low and middle-income countries. Pre-eclampsia-related deaths may be due to reduced midwifery knowledge and inadequate management. Therefore, a training needs assessment is vital in identifying gaps in practice, especially, in poorly resourced settings for maximal use of training resources. Design: A hospital-based cross-sectional study. Setting: The largest tertiary hospital in Ghana. Methods: An online version of the validated WHO Hennessy-Hicks Training Needs Analysis questionnaire was …

Core Competencies For Registered Nurse Preceptors: A Mapping Review Of Quantitative Studies, Colleen L. Ryan, Robyn Cant, Lynda Hughes, Darrelle Ahchay, Karen Strickland

Research outputs 2022 to 2026

Aims: To review the contemporary international literature on nurse preceptor competencies and map the components and their descriptors. Review Methods: A mapping review. Data Sources: Articles reporting evidence-based and validated Registered Nurse (RN) preceptor competencies published between 2013 and 2022 were identified. Open access databases such as PubMed and Google Scholar and the library healthcare databases Scopus and CINAHL were searched. The authors collaborated at each review stage that included screening, article selection, tabulation, mapping and preparation of findings. Results: Seven quantitative studies were included. Three were based on existing nurse preceptor competency data sets and four were purposely developed …

Relative Strength Explains The Differences In Multi-Joint Rapid Force Production Between Sexes, Paul Comfort, John J. Mcmahon, Jason P. Lake, Nicholas J. Ripley, N. Travis Triplett, G. Gregory Haff

Research outputs 2022 to 2026

The primary aim of this study was to determine whether relative strength explains the differences in the rapid force production (force developed during first 150-, 200-, and 250 ms) of females and males, and to evaluate the relationships between peak force and rapid force production. Sixty-three team sport athletes (females: n = 25, age = 21.5 ± 1.3 years, stature = 166 ± 5 cm, body mass = 60.65 ± 10.04 kg; males: n = 38, age = 21.9 ± 1.1 years, stature = 178 ± 7 cm, body mass = 76.55 ± 12.88 kg) performed a series of isometric …

Remnant Cholesterol Traits And Risk Of Stroke: A Multivariable Mendelian Randomization Study, Zhiyuan Wu, Yue Jiang, Zheng Guo, Pingan Li, Yulu Zheng, Yutao Wang, Haiping Zhang, Lois Balmer, Xingang Li, Lixin Tao, Qi Zhang, Bo Gao, Xiuhua Guo

Research outputs 2022 to 2026

Observational epidemiological studies have reported a relationship between remnant cholesterol and stroke. However, the results are inconclusive, and causality remains unclear due to confounding or reverse causality. Our objective in this study was to investigate the causal relevance of remnant cholesterol and the risk of stroke and its subtypes using the Mendelian randomization (MR) approach. Genome-wide association studies (GWASs) including 115,082 European individuals (UK Biobank) were used to identify instruments for remnant cholesterol, including intermediate-density lipoprotein (IDL) cholesterol and very-low-density lipoprotein (VLDL) cholesterol. Summary-level data for total stroke, intracerebral hemorrhage, subarachnoid hemorrhage, ischemic stroke (IS), and IS subtypes were obtained …

Audit Tools For Culturally Safe And Responsive Healthcare Practices With Aboriginal And Torres Strait Islander People: A Scoping Review, Jessica Muller, Susan Devine, Lynore Geia, Alice Cairns, Kylie Stothers, Paul Gibson, Donna Murray

Research outputs 2022 to 2026

Aboriginal and Torres Strait Islander people in Australia face disparities in accessing culturally safe and appropriate health services. While current cultural safety and responsiveness frameworks set standards for improving healthcare practices, ensuring accountability and sustainability of changes, necessitates robust mechanisms for auditing and monitoring progress. This study examined existing cultural safety audit tools, and facilitators and barriers to implementation, in the context of providing culturally safe and responsive healthcare services with Aboriginal and Torres Strait Islander people. This will assist organisations, interested in developing tools, to assess culturally responsive practice. A scoping review was undertaken using Medline, Scopus, CINAHL, Informit …

Determining The Feasibility Of A Codesigned And Personalised Intervention (Veg4me) To Improve Vegetable Intake In Young Adults Living In Rural Australian Communities: Protocol For A Randomised Controlled Trial, Katherine M. Livingstone, Jonathan C. Rawstorn, Stephanie R. Partridge, Yuxin Zhang, Eric O, Stephanie L. Godrich, Sarah A. Mcnaughton, Gilly A. Hendrie, Kate Dullaghan, Gavin Abbott, Lauren C. Blekkenhorst, Ralph Maddison, Scott Barnett, John C. Mathers, Laura Alston

Research outputs 2022 to 2026

INTRODUCTION: Diets low in vegetables are a main contributor to the health burden experienced by young adults in rural communities. Digital health interventions provide an accessible delivery model that can be personalised to meet the diverse preferences of young adults. A personalisable digital vegetable intake intervention (Veg4Me) was codesigned to meet the needs of young adults living in rural communities. This study will determine the feasibility of delivering a personalised Veg4Me programme and compare preliminary effects with a non-personalised Veg4Me (control). METHODS AND ANALYSIS: A 12-week assessor-blinded, two-arm, parallel randomised controlled trial will be undertaken from August 2023 until April …

Are Remote Health Clinics Primary Health Care Focused? Validation Of The Primary Health Care Engagement (Phce) Scale For The Australian Remote Primary Health Care Setting, Kylie Mccullough, Gemma Doleman, Melissa Dunham, Lisa Whitehead, Davina Porock

Research outputs 2022 to 2026

AIM: To test and validate a measure of primary health care (PHC) engagement in the Australian remote health context. BACKGROUND: PHC principles include quality improvement, community participation and orientation of health care, patient-centred continuity of care, accessibility, and interdisciplinary collaboration. Measuring the alignment of services with the principles of PHC provides a method of evaluating the quality of care in community settings. METHODS: A two-stage design of initial content and face validity evaluation by a panel of experts and then pilot-testing the instrument via survey methods was conducted. Twelve experts from clinical, education, management and research roles within the remote …

Immune Checkpoint Inhibitor Therapy For Advanced Cutaneous Squamous Cell Carcinoma In Australia: A Retrospective Real World Cohort Study, Luke S. Mclean, Annette M. Lim, Mathias Bressel, Jenny Lee, Rahul Ladwa, Alexander D. Guminski, Brett Hughes, Samantha Bowyer, Karen Briscoe, Samuel Harris, Craig Kukard, Rob Zielinski, Muhammad Alamgeer, Matteo Carlino, Jeremy Mo, John J. Park, Muhammad A. Khattak, Fiona Day, Danny Rischin

Research outputs 2022 to 2026

Objectives: To review the outcomes of immune checkpoint inhibitor (ICI) treatment of advanced cutaneous squamous cell carcinoma (CSCC) outside clinical trials. Study design: Retrospective observational study; review of patient records in fifteen Australian institutions. Setting, participants: All Australian adults with locally advanced or metastatic CSCC not amenable to curative surgery or radiotherapy treated with ICIs, 5 May 2017 – 23 May 2022, through a cemiplimab compassionate access scheme (Therapeutic Goods Administration Special Access Scheme) or who personally covered the cost of pembrolizumab prior to the start of the access scheme. Main outcome measures: Best overall response rate (ORR) according to …

Excitatory Drive To Spinal Motoneurones Is Necessary For Serotonin To Modulate Motoneurone Excitability Via 5-Ht2 Receptors In Humans, Tyler T. Henderson, Janet L. Taylor, Jacob R. Thorstensen, Justin J. Kavanagh

Research outputs 2022 to 2026

Serotonin modulates corticospinal excitability, motoneurone firing rates and contractile strength via 5-HT2 receptors. However, the effects of these receptors on cortical and motoneurone excitability during voluntary contractions have not been explored in humans. Therefore, the purpose of this study was to investigate how 5-HT2 antagonism affects corticospinal and motoneuronal excitability with and without descending drive to motoneurones. Twelve individuals (aged 24 ± 4 years) participated in a double-blind, placebo-controlled, crossover study, whereby the 5-HT2 antagonist cyproheptadine was administered. Transcranial magnetic stimulation (TMS) was delivered to the motor cortex to produce motor evoked potentials (MEPs), and electrical stimulation at the cervicomedullary …

The Gut Microbiome Modulates Associations Between Adherence To A Mediterranean-Style Diet, Abdominal Adiposity, And C-Reactive Protein In Population-Level Analysis, Amy Jennings, Tilman Kühn, Nicola P. Bondonno, Sabina Waniek, Corinna Bang, Andre Franke, Jan Kassubek, Hans-Peter Müller, Marcus Both, Katharina S. Weber, Wolfgang Lieb, Aedín Cassidy

Research outputs 2022 to 2026

Background: Adherence to a Mediterranean-style dietary pattern is likely to have variable effects on body composition, but the impact of gut microbiome on this relationship is unknown. Objectives: To examine the potential mediating effect of the gut microbiome on the associations between Alternate Mediterranean Diet (aMed) scores, abdominal adiposity, and inflammation in population-level analysis. Design: In a community-based sample aged 25 to 83 y (n = 620; 41% female) from Northern Germany, we assessed the role of the gut microbiome, sequenced from 16S rRNA genes, on the associations between aMed scores, estimated using validated food-frequency questionnaires, magnetic resonance imaging-determined visceral …

Co-Designing An Online Treatment Decision Aid For Men With Low-Risk Prostate Cancer: Navigate, Penelope Schofield, Amelia Hyatt, Alan White, Fiona White, Mark Frydenberg, Suzanne Chambers, Robert Gardiner, Declan G. Murphy, Lawrence Cavedon, Jeremy Millar, Natalie Richards, Barbara Murphy, Ilona Juraskova

Research outputs 2022 to 2026

Objectives: To develop an online treatment decision aid (OTDA) to assist patients with low-risk prostate cancer (LRPC) and their partners in making treatment decisions. Patients and methods: Navigate, an OTDA for LRPC, was rigorously co-designed by patients with a confirmed diagnosis or at risk of LRPC and their partners, clinicians, researchers and website designers/developers. A theoretical model guided the development process. A mixed methods approach was used incorporating (1) evidence for essential design elements for OTDAs; (2) evidence for treatment options for LRPC; (3) an iterative co-design process involving stakeholder workshops and prototype review; and (4) expert rating using the …

Exercise Professional Education, Qualifications, And Certifications: A Content Analysis Of Job Postings In The United States, Rachele Pojednic, Devin P. O’Neill, Molly G. Flanagan, Alexis Bartlett, Byron L. G. Carter, Mary A. Kennedy

Research outputs 2022 to 2026

Introduction: Growth in the field of clinical exercise science and the potential impacts on overall health and wellbeing have driven the need for qualified, clinically trained, exercise professionals. And yet, it is not well understood what specific credentials employers are seeking when hiring exercise professionals. Purpose: The purpose of the study was to examine the qualification requirements for professionals seeking employment in exercise science, exercise physiology, kinesiology or equivalent fields. Methods: Search platforms Indeed.com and USAJobs.gov were examined within a two week period in 2022. Search terms included “Exercise Physiology”, “Exercise Science”, “Exercise Professional”, “Exercise Prescription”, “Exercise Specialist”, and “Kinesiology”. …

Changes In Sleep Effort Mediate Insomnia Severity In Older Adults Following Online Cognitive Behavioural Therapy, Yvonne Kutzer, Lisa Whitehead, Eimear Quigley, Mandy Stanley

Research outputs 2022 to 2026

Background

To examine treatment mechanisms of digitally delivered cognitive behavioural therapy for insomnia (CBT-I), this study assessed the mediating effects of dysfunctional beliefs, hyperarousal, locus of control, self-efficacy, sleep effort, and safety behaviours on self-reported insomnia severity in older adults before and following the completion of a self-guided, online CBT-I program.

Methods

The baseline and follow-up measurements were completed by 62 older adults (55 female, 89%). This was a two-condition within-participant design. Mediation analysis using a parallel mediation model was conducted using the MEMORE macro for repeated measure designs.

Results

Out of all the included mediator variables, only a reduction …

Blood Eosinophil-Guided Oral Prednisolone For Copd Exacerbations In Primary Care In The Uk (Starr2): A Non-Inferiority, Multicentre, Double-Blind, Placebo-Controlled, Randomised Controlled Trial, Sanjay Ramakrishnan, Helen Jeffers, Beverly Langford-Wiley, Joanne Davies, Samantha J. Thulborn, Mahdi Mahdi, Christine A'Court, Ian Binnian, Stephen Bright, Simon Cartwright, Victoria Glover, Alison Law, Robin Fox, Adam Jones, Christopher Davies, David Copping, Richard E. K. Russell, Mona Bafadhel

Research outputs 2022 to 2026

Background: Systemic glucocorticoids are recommended for use in chronic obstructive pulmonary disease (COPD) exacerbations; however, there is increased harm associated with their use. We hypothesised that the use of eosinophil biomarker-directed oral prednisolone therapy at the time of an exacerbation of COPD was effective at reducing prednisolone use without affecting adverse outcomes. Methods: The studying acute exacerbations and response (STARR2) study was a multicentre, randomised, double-blind, placebo-controlled trial conducted in 14 primary care practices in the UK. We included adults (aged ≥ 40 years), who were current or former smokers (with at least a 10 pack year smoking history) with …

Predicting Neurodegeneration From Sleep Related Biofluid Changes, Yue Yang, Woojin S. Kim, Johannes C. Michaelian, Simon J. G. Lewis, Craig L. Phillips, Angela L. D'Rozario, Pratishtha Chatterjee, Ralph N. Martins, Ron Grunstein, Glenda M. Halliday, Sharon L. Naismith

Research outputs 2022 to 2026

Sleep-wake disturbances are common in neurodegenerative diseases and may occur years before the clinical diagnosis, potentially either representing an early stage of the disease itself or acting as a pathophysiological driver. Therefore, discovering biomarkers that identify individuals with sleep-wake disturbances who are at risk of developing neurodegenerative diseases will allow early diagnosis and intervention. Given the association between sleep and neurodegeneration, the most frequently analyzed fluid biomarkers in people with sleep-wake disturbances to date include those directly associated with neurodegeneration itself, such as neurofilament light chain, phosphorylated tau, amyloid-beta and alpha-synuclein. Abnormalities in these biomarkers in patients with sleep-wake disturbances …

Quantitative Comparison Of Presenilin Protein Expression Reveals Greater Activity Of Ps2-Γ-Secretase, Melissa K. Eccles, Nathan Main, Rodrigo Carlessi, Ayeisha M. Armstrong, Miheer Sabale, Brigid Roberts-Mok, Janina E. E. Tirnitz-Parker, Mark Agostino, David Groth, Paul E. Fraser, Giuseppe Verdile

Research outputs 2022 to 2026

γ-secretase processing of amyloid precursor protein (APP) has long been of interest in the pathological progression of Alzheimer's disease (AD) due to its role in the generation of amyloid- . The catalytic component of the enzyme is the presenilins of which there are two homologues, Presenilin-1 (PS1) and Presenilin-2 (PS2). The field has focussed on the PS1 form of this enzyme, as it is typically considered the more active at APP processing. However, much of this work has been completed without appropriate consideration of the specific levels of protein expression of PS1 and PS2. We propose that expression is an …

The Association Between Lateral Hip Muscle Size/Intramuscular Fat Infiltration And Hip Strength In Active Young Adults With Long Standing Hip/Groin Pain, Zuzana Perraton, Andrea B. Mosler, Peter R. Lawrenson, Kenneth Weber Ii, James M. Elliott, Evert O. Wesselink, Kay M. Crossley, Joanne L. Kemp, Christopher Stewart, Michael Girdwood, Matthew G. King, Joshua J. Heerey, Mark J. Scholes, Benjamin F. Mentiplay, Adam I. Semciw

Research outputs 2022 to 2026

Objectives: To investigate associations between lateral hip muscle size/intramuscular fat infiltration (MFI) and hip strength in active young adults with longstanding hip/groin pain. Design: Cross-sectional study. Setting: University/Clinical. Participants: Sub-elite soccer and Australian Football players (n = 180; 37 female) with long standing hip/groin pain. Main outcome measures: Muscle size (volume) and MFI of gluteus maximus, medius, and minimis, and tensor fascia latae (TFL) were assessed using magnetic resonance imaging. Isometric hip strength was measured with handheld dynamometry. Associations between muscle size/MFI were assessed using linear regression models, adjusted for body mass index and age, with sex-specific interactions. Results: Positive …

Unveiling The Link Between Systemic Inflammation Markers And Cognitive Performance Among Older Adults In The Us: A Population-Based Study Using Nhanes 2011–2014 Data, Zheng Guo, Yulu Zheng, Jian Geng, Zhiyuan Wu, Tao Wei, Guangle Shan, Yahong Zhu, Yuanyuan Zheng, Xingang Li

Research outputs 2022 to 2026

Purpose: This study aimed to evaluate the association between systemic inflammation markers and cognitive performance among older US adults. Methods: This cross-sectional study assessed 3,632 older participants from the 2011–2014 National Health and Nutrition Examination Survey (NHANES). The main analysis included participants aged over 60 years. Systemic inflammation markers were quantified by calculating the composite inflammation indicators from the blood routine count, and cognitive performance was assessed using Consortium to Establish a Registry for Alzheimer's Disease (CERAD) test, Animal Fluency test (AFT), and Digit Symbol Substitution test (DSST). Results: There were 2,743 individuals enrolled in the current analysis. The overall …

Association Of Abnormal Lung Function And Its Subtypes With Arterial Stiffness: A Longitudinal Cohort Study, Zhiyuan Wu, Haiping Zhang, Yue Jiang, Zhiwei Li, Yutao Wang, Yixing Tian, Zheng Guo, Yulu Zheng, Xia Li, Lixin Tao, Xiuhua Guo

Research outputs 2022 to 2026

BACKGROUND: Prior studies have reported the cross-sectional relationship between lung function and arterial stiffness, while the longitudinal association remains unclear to date. This study aimed to investigate whether abnormal lung function and its subtypes at baseline are associated with increased arterial stiffness using a cohort. METHODS AND RESULTS: This was a secondary analysis extracting 2461 participants from Beijing Health Management Cohort as baseline and annually followed for development of arterial stiffness. Abnormal lung function was defined by forced expiratory volume in 1s < 80% of the predicted value, forced vital capacity of the predicted value, or forced expiratory volume in 1s/ forced vital capacity ratio < 70%. Increased arterial stiffness was determined by brachial-ankle pulse wave velocity ≥ 1400 cm/s. Cox proportional hazards model was used to calculate the hazard ratio and population attributable fraction. The mean age was 42.8±8.1 years, and 444 (18.0%) cases developed increased arterial stiffness during a median follow-up of 3.0 years. The adjusted hazard ratio (95% CI) of arterial stiffness was 1.47 (95% CI, 1.10–1.96) for abnormal lung function, with a population attributable fraction of 3.9% (95% CI, 0.8–7.1). Of subtypes, only obstructive ventilatory dysfunction was significantly associated with arterial stiffness (adjusted hazard ratio, 2.06 [95% CI, 1.27–3.36]), not restricted ventilatory dysfunction (adjusted hazard ratio, 0.95 [95% CI, 0.54–1.65]). Consistent results were observed on multiple sensitivity analyses. CONCLUSIONS: Our study indicated a longitudinal association of abnormal lung function with increased arterial stiffness using a large cohort, especially for the obstructive ventilatory dysfunction.

Metagenomic Characterisation Of The Gut Microbiome And Effect Of Complementary Feeding On Bifidobacterium Spp. In Australian Infants, Kimberley Parkin, Debra J. Palmer, Valerie Verhasselt, Nelly Amenyogbe, Matthew N. Cooper, Claus T. Christophersen, Susan L. Prescott, Desiree Silva, David Martino

Research outputs 2022 to 2026

Complementary feeding induces dramatic ecological shifts in the infant gut microbiota toward more diverse compositions and functional metabolic capacities, with potential implications for immune and metabolic health. The aim of this study was to examine whether the age at which solid foods are introduced differentially affects the microbiota in predominantly breastfed infants compared with predominantly formula-fed infants. We performed whole-genome shotgun metagenomic sequencing of infant stool samples from a cohort of six-month-old Australian infants enrolled in a nested study within the ORIGINS Project longitudinal birth cohort. Infants born preterm or those who had been administered antibiotics since birth were excluded. …