Publications by authors named "McKinnon M"

Public safety personnel (PSP), such as police officers, firefighters, correctional workers, and paramedics, routinely face work stressors that increase their risk of developing posttraumatic stress disorder (PTSD). PSP may additionally face moral transgressions in the workplace (e.g.

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  • Many peatlands in North America's Western Boreal Plain have been affected by industrial activities, like the construction of oil well pads.
  • A study was conducted in Alberta to evaluate the hydrological functions of a partially removed well pad to see if it could support the growth of fen mosses for restoration purposes.
  • The findings indicated that while some areas of the pad maintained good water table levels, other parts experienced inconsistent water flow, highlighting the need for improvement in connecting the pad's hydrology with surrounding peatlands to better support fen moss establishment.
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  • The study investigates the effectiveness of abdominal ultrasounds in diagnosing appendicitis, noting that a significant number (45-82%) of ultrasounds yield inconclusive results, requiring further testing like CT scans.
  • Researchers analyzed health records of patients with right lower quadrant pain and indeterminate ultrasounds, focusing on determining factors that could help rule out appendicitis without needing a CT scan.
  • The findings indicate that a high neutrophil count and certain ultrasound signs correlate with appendicitis; however, not having these indicators allows for a reliable rule-out strategy, with a negative predictive value of 97%.
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Forensic scientific practitioners and researchers must navigate a rapidly growing body of research. This makes it increasingly challenging to inform courts, lawyers, and other decision makers about the state of the field, thus heightening the chances of wrongful convictions and acquittals. When similar challenges have arisen in other fields, they have turned to systematic reviews, which are research reviews that use formal, articulated methods to provide a comprehensive summary of the literature on a specific research question.

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Background: The Aboriginal health workforce has unique insights given their healthcare experience and interactions with their communities. The aims of this project were to explore their perceptions of hepatitis B related shame and ways to improve hepatitis B care in Aboriginal and Torres Strait Islander communities of Northern Territory's Top End, Australia.

Methods: We conducted a qualitative study with guidance from the Menzies School of Health Research Infectious Diseases Indigenous Reference Group.

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Background: Staffing shortages across the healthcare sector pose a threat to the continuity of the Canadian healthcare system in the post-COVID-19 pandemic era. We sought to understand factors associated with turnover intention as well as Canadian healthcare providers' (HCPs) perspectives and experiences with turnover intention as related to both organizational and professional turnover.

Method: A convergent questionnaire mixed-methods design was employed.

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  • The study investigated how treatment affects neurocognitive performance in individuals with OCD, focusing on symptom changes and the role of the BDNF Val66Met polymorphism as a genetic factor.
  • Participants (N = 125) received various treatments, including cognitive behavioral therapy (CBT) and physical exercise, with assessments done before and after treatment to measure OCD symptoms and neurocognitive abilities.
  • Results showed that while OCD symptoms improved with treatment, neurocognitive performance also enhanced independently of the BDNF genotype, indicating a strong link between symptom relief and cognitive function improvement.
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Background: The Northern Territory (NT) has the highest prevalence of chronic hepatitis B (CHB) in Australia. The Hep B PAST program aims to improve health outcomes for people living with CHB.

Methods: This mixed methods study involves First Nations peoples living in the NT.

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Problem: Medical school graduates enter a complex health care delivery system involving interprofessional teamwork and multifaceted value-based patient care decisions. However, current curricula on health systems science (HSS) are piecemeal, lecture based, and confined to preclinical training.

Approach: The VISTA program is a longitudinal, immersive learning curriculum integrated into the University of Chicago Pritzker School of Medicine curriculum between 2016 and 2018.

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Background: Hepatitis B is endemic amongst the Australian Aboriginal population in the Northern Territory. A participatory action research project identified the lack of culturally appropriate education tools and led to the development of the "Hep B Story" app in the Aboriginal language Yolŋu Matha. This paper describes a formal evaluation of the app's first version, which informed improvements and translation into a further ten Aboriginal languages.

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Healthcare workers (HCWs) across the globe have reported symptoms of Post-Traumatic Stress Disorder (PTSD) during the COVID-19 pandemic. Moral Injury (MI) has been associated with PTSD in military populations, but is not well studied in healthcare contexts. Moral Distress (MD), a related concept, may enhance understandings of MI and its relation to PTSD among HCWs.

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Objective: Posttraumatic stress disorder (PTSD) is a debilitating psychiatric illness, experienced by approximately 10% of the population. Heterogeneous presentations that include heightened dissociation, comorbid anxiety and depression, and emotion dysregulation contribute to the severity of PTSD, in turn, creating barriers to recovery. There is an urgent need to use data-driven approaches to better characterize complex psychiatric presentations with the aim of improving treatment outcomes.

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Introduction: Respiratory therapists (RTs) faced morally distressing situations throughout the COVID-19 pandemic, including working with limited resources and facilitating video calls for families of dying patients. Moral distress is associated with a host of adverse psychological and functional outcomes (e.g.

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Public safety personnel (PSP), including firefighters, paramedics, and police officers, are exposed to traumatic events as part of their day-to-day jobs. These traumatic events often result in significant stress and increase the likelihood of negative mental health outcomes, including post-traumatic stress disorder (PTSD). The present study sought to develop an in-depth understanding of the lived experiences of PSPs as related to the mental health toll of their service.

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Direct eye contact is essential to understanding others' thoughts and feelings in social interactions. However, those with post-traumatic stress disorder (PTSD) and exposure to moral injury (MI) may exhibit altered theory-of-mind (ToM)/mentalizing processes and experience shame which precludes one's capacity for direct eye contact. We investigated blood oxygenation level-dependent (BOLD) responses associated with direct vs averted gaze using a virtual reality paradigm in individuals with PTSD (n = 28) relative to healthy controls (n = 18) following recall of a MI vs a neutral memory.

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  • Healthcare providers (HCPs) experienced moral injuries related to shame and trust violations during the COVID-19 pandemic, affecting their mental health.
  • The study surveyed 176 Canadian HCPs to explore how different coping methods, like spirituality and organizational support, influenced these moral injuries.
  • Results showed that spiritual well-being and organizational support significantly reduced both total and specific types of moral injury, particularly highlighting their stronger impact on trust-violation-related injuries compared to shame-related injuries.
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Few studies have examined changes in posttraumatic-stress disorder (PTSD) symptomatology across an extended time period during the COVID-19 pandemic. This study used a longitudinal cohort design to examine: (1) changes in overall PTSD symptoms and symptom clusters; (2) moderators of change; (3) the clinical significance of observed changes; and (4) correlates of clinically meaningful changes. Community adults (N = 1412) were assessed using the PTSD Checklist for DSM-5 (PCL-5) at 10 timepoints (October 2018 - April 2022).

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Background: Advanced neuroscientific insights surrounding post-traumatic stress disorder (PTSD) and its associated symptomatology should beget psychotherapeutic treatments that integrate these insights into practice. Deep Brain Reorienting (DBR) is a neuroscientifically-guided psychotherapeutic intervention that targets the brainstem-level neurophysiological sequence that transpired during a traumatic event. Given that contemporary treatments have non-response rates of up to 50% and high drop-out rates of >18%, DBR is investigated as a putative candidate for effective treatment of some individuals with PTSD.

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Background: The prevalence of chronic hepatitis B (CHB) in Aboriginal and Torres Strait Islander Australians in Far North Queensland (FNQ) is greater than twice that of the general Australian population. CHB is common in Torres Strait Islanders diagnosed with hepatocellular carcinoma (HCC) - and in Aboriginals with HCC living in the Northern Territory - however, Aboriginals diagnosed with HCC in FNQ very rarely have CHB. The explanation for this apparent disparity is uncertain.

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  • The research aimed to evaluate the effectiveness of aerobic exercise and cognitive behavioural therapy (CBT) on reducing OCD symptoms, particularly for those who don't respond well to CBT alone.
  • A total of 125 participants were divided into four groups: a waitlist control, an exercise group, a CBT group, and a group combining CBT with exercise, with OCD symptoms measured at different points during the study.
  • Results showed that both CBT and its combination with exercise led to more significant reductions in OCD symptoms compared to exercise alone, indicating that the frequency of exercise plays a crucial role in symptom improvement.
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Surface electromyography measurements of the Hoffmann (H-) reflex are essential in a wide range of neuroscientific and clinical applications. One promising emerging therapeutic application is H-reflex operant conditioning, whereby a person is trained to modulate the H-reflex, with generalized beneficial effects on sensorimotor function in chronic neuromuscular disorders. Both traditional diagnostic and novel realtime therapeutic applications rely on accurate definitions of the H-reflex and M-wave temporal bounds, which currently depend on expert case-by-case judgment.

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Aims: Few multi-wave longitudinal studies have examined mental health changes across the coronavirus 2019 (COVID-19) pandemic. The current study examined: (a) overall changes in depression and anxiety over 10-waves of data collection; (b) subgroup moderators of changes; (c) clinical severity of the changes via minimally important differences (MIDs); and (d) correlates of clinically important changes.

Methods: Using a longitudinal observational cohort design, 1412 non-clinical adults (Mage=36; 60% female) were assessed for depression and anxiety via the PHQ-9 and GAD-7 from October 2018 to April 2022 (3 pre-pandemic, 7 intra-pandemic waves; M retention = 92%).

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Neural representations of sensory percepts and motor responses constitute key elements of autobiographical memory. However, these representations may remain as unintegrated sensory and motor fragments in traumatic memory, thus contributing toward re-experiencing and reliving symptoms in trauma-related conditions such as post-traumatic stress disorder (PTSD). Here, we investigated the sensorimotor network (SMN) and posterior default mode network (pDMN) using a group independent component analysis (ICA) by examining their functional connectivity during a script-driven memory retrieval paradigm of (potentially) morally injurious events in individuals with PTSD and healthy controls.

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Background: Post-traumatic stress disorder can be viewed as a memory disorder, with trauma-related flashbacks being a core symptom. Given the central role of the hippocampus in autobiographical memory, surprisingly, there is mixed evidence concerning altered hippocampal functional connectivity in PTSD. We shed light on this discrepancy by considering the distinct roles of the anterior versus posterior hippocampus and examine how this distinction may map onto whole-brain resting-state functional connectivity patterns among those with and without PTSD.

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