Publications by authors named "Crouse J"

Background: Functional impairment is a major concern among those presenting to youth mental health services and can have a profound impact on long-term outcomes. Early recognition and prevention for those at risk of functional impairment is essential to guide effective youth mental health care. Yet, identifying those at risk is challenging and impacts the appropriate allocation of indicated prevention and early intervention strategies.

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Objectives: We examined associations between polygenic risk scores (PRS) for depression (PRS-MDD), psychosis (PRS-SCZ), bipolar disorders (PRS-BD) and neuroticism (PRS-NEU) and (i) help-seeking, and (ii) new onset cases of full-threshold mood or psychotic disorders in youth.

Methods: Help-seeking for mental health problems was assessed by self-report and mood and psychotic disorders were identified using the Composite International Diagnostic Interview. A principal component analysis of the four selected PRS identified two dimensions (BD-SCZ; MDD-NEU) that accounted for 69.

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Onchocerca is an important genus of vector-borne filarial nematodes that infect both humans and animals worldwide. Many Onchocerca spp., most of medical and veterinary health relevance, are the focus of a variety of diagnostic and molecular research.

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Article Synopsis
  • - Moose in boreal habitats are heavily exposed to Dipteran flies, with a study on the Kenai Peninsula revealing that 91% of collected flies were a specific moose fly species, impacting their health.
  • - The study found a positive correlation between the number of sores on moose hind legs and their body fat, indicating that while moose gain energy, they also suffer from injuries caused by flies and parasites.
  • - Interestingly, the presence of flies did not trigger a stress response in moose, as indicated by stable corticosteroid levels, yet the injuries sustained can negatively affect their reproduction and overall survival.
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  • - This study explored the impact of filarioid nematodes on northern ungulates, specifically through the detection of their microfilariae in moose blood samples using a new qPCR method.
  • - Researchers collected 166 blood samples from wild moose in Alaska and compared findings from the modified Knott's test and the new qPCR for detecting two types of parasites, achieving a high correlation between the two methods.
  • - The qPCR method showed a detection limit of 0.157 pg/μL of DNA and provided quicker, less labor-intensive results for monitoring these parasites in moose populations.
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  • The COVID-19 pandemic led to increased flexibility in sleep-wake schedules, significantly impacting sleep patterns, especially in individuals with a history of depression.
  • Before the pandemic, 70% of participants reported optimal sleep (6-8 hours), but this dropped to 49% during the pandemic, with many shifting to either short (<6 hours) or long sleep (>8 hours).
  • Factors like pre-pandemic mental health, insomnia, and stressful life events were linked to the shift to short sleep, while no significant predictors were found for those who moved to long sleep, suggesting the need for targeted interventions for affected individuals.
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Mental fitness is a construct that goes beyond a simple focus on subjective emotional wellbeing to encompass more broadly our ability to think, feel, and act to achieve what we want in our daily lives. The measurement and monitoring of multiple (often interacting) domains is crucial to gain a holistic and complete insight into an individual's mental fitness. We aimed to demonstrate the capability of a new mobile app to characterise the mental fitness of a general population of Australians and to quantify the interrelationships among different domains of mental fitness.

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Moose () in the boreal forest habitats of Alaska are unlike other northern ungulates because they tolerate high densities of flies (Diptera) even though flies cause wounds and infections during the warm summer months. Moose move to find food and to find relief from overheating (hyperthermia) but do they avoid flies? We used GPS collars to measure the rate of movement (m⋅h) and the time spent (min⋅day) by enclosed moose in four habitats: wetlands, black spruce, early seral boreal forest, and late seral boreal forest. Fly traps were used in each habitat to quantify spatio-temporal abundance.

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Protecting brain health is a goal of early intervention. We explored whether sleep quality or chronotype could predict white matter (WM) integrity in emerging mental disorders. Young people (N = 364) accessing early-intervention clinics underwent assessments for chronotype, subjective sleep quality, and diffusion tensor imaging.

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Globally, 75% of depressive, bipolar, and psychotic disorders emerge by age 25 years. However, these disorders are often preceded by non-specific symptoms or attenuated clinical syndromes. Difficulties in determining optimal treatment interventions for these emerging mental disorders, and uncertainties about accounting for co-occurring psychopathology and illness trajectories, have led many youth mental health services to adopt transdiagnostic clinical staging frameworks.

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The dominant ('general') version of the diathesis-stress theory of depression views stressors and genetic vulnerability as independent risks. In the Australian Genetics of Depression Study (N = 14,146; 75% female), we tested whether polygenic scores (PGS) for major depression, bipolar disorder, schizophrenia, anxiety, ADHD, and neuroticism were associated with reported exposure to 32 childhood, past-year, lifetime, and accumulated stressful life events (SLEs). In false discovery rate-corrected models, the clearest PGS-SLE relationships were for the ADHD- and depression-PGSs, and to a lesser extent, the anxiety- and schizophrenia-PGSs.

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Introduction: Regional gray matter (GM) alterations have been reported in early-onset psychosis (EOP, onset before age 18), but previous studies have yielded conflicting results, likely due to small sample sizes and the different brain regions examined. In this study, we conducted a whole brain voxel-based morphometry (VBM) analysis in a large sample of individuals with EOP, using the newly developed ENIGMA-VBM tool.

Methods: 15 independent cohorts from the ENIGMA-EOP working group participated in the study.

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Background: Preliminary evidence suggests that evening chronotype is related to poorer efficacy of selective serotonin reuptake inhibitors. It is unknown whether this is specific to particular medications, self-rated chronotype, or efficacy.

Methods: In the Australian Genetics of Depression Study (n = 15,108; 75% women; 18-90 years; 68% with ≥1 other lifetime diagnosis), a survey recorded experiences with 10 antidepressants, and the reduced Morningness-Eveningness Questionnaire was used to estimate chronotype.

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Objective: To describe peer-reviewed literature on chiropractic faculty participation in research and identify important barriers and facilitators.

Methods: We conducted a scoping review using comprehensive searches of relevant databases from inception through November 2022. English language publications of any design were included, with search terms consisting of subject headings specific to each database and free text words related to chiropractic, faculty, and research.

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Measurements of reproductive and stress-related hormones in keratinous tissues (e.g. hair, claws, hooves, baleen) can provide a record of stress and reproductive response in wildlife.

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Article Synopsis
  • - The study tests a new mental health care model called 'highly personalised and measurement-based care' (HP&MBC) for adolescents and young adults with mood disorders, aiming to improve education, employment, and social functioning compared to standard care.
  • - It involves a 24-month trial with 1500 participants aged 15-25 who will be randomly assigned to either HP&MBC or standard care, with social and occupational functioning evaluated after 12 months.
  • - The trial is ethically approved, and results will be shared through various channels while ensuring participant data remains confidential.
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Aim: To examine whether polygenic risk scores (PRS) for neuroticism, depression, bipolar disorder and schizophrenia are higher in individuals manifesting trans-diagnostic risk factors for the development of major mental disorders and whether PRS enhance prediction of early onset full-threshold disorders.

Methods: Using data from the Brisbane Longitudinal Twin Study, we examined individual PRS for neuroticism, depression, bipolar disorder and schizophrenia, recorded evidence of subthreshold syndromes and family history of mood and/or psychotic disorders and noted progression to trans-diagnostic clinical caseness (onset of major mental disorders) at follow-up. We undertook multivariate, receiver operating curve and logistic regression analyses that were adjusted for known variables of influence (age, twin status, and so on).

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Background: Traditional methods for benchmarking dietitian productivity are time-consuming and fail to accurately measure the total time spent providing nutrition care. An electronic health record (EHR)-based tool that allows for daily tracking of both face-to-face and patient care coordination time for dietitians was created. We assessed whether it provided consistent, continuous measurement of time and productivity.

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Aims: The needs of young people attending mental healthcare can be complex and often span multiple domains (e.g., social, emotional and physical health factors).

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Background: Optimal child-rearing practices can help mitigate the consequences of detrimental social determinants of health in early childhood. Given the ubiquity of personal digital technologies worldwide, the direct delivery of evidence-based information about early childhood development holds great promise. However, to make the content of these novel systems effective, it is crucial to incorporate place-based cultural beliefs, traditions, circumstances, and value systems of end users.

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Objective: Many children in low-income and middle-income countries are disadvantaged in achieving early developmental potential in childhood as they lack the necessary support from their surroundings, including from parents and caregivers. Digital technologies, such as smartphone apps, coupled with iterative codesign to engage end-users in the technology-delivered content development stages, can help overcome gaps in early child development (ECD). We describe the iterative codesign and quality improvement process that informs the development of content for the , localised for nine countries in Asia and Africa.

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Background: Nutrition screening is recommended to identify children at risk for malnutrition. A unique screening tool was developed based on American Society for Parenteral and Enteral Nutrition (ASPEN) recommendations and embedded in the electronic medical record to assess for nutrition risk.

Methods: The components of the tool included the Paediatric Nutrition Screening Tool (PNST) and other elements recommended by ASPEN.

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There is significant interest in the possible influence of chronotype on clinical states in young people with emerging mental disorders. We apply a dynamic approach (bivariate latent change score modelling) to examine the possible prospective influence of chronotype on depressive and hypo/manic symptoms in a youth cohort with predominantly depressive, bipolar, and psychotic disorders ( = 118; 14-30-years), who completed a baseline and follow-up assessment of these constructs (mean interval = 1.8-years).

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