Publications by authors named "Humphries B"

Background: Health utility is a key input used to perform cost-utility analysis (CUA), which is increasingly used to inform resource allocation decisions.

Objective: To identify the sources and elicitation methods of health utilities used in CUAs in oncology.

Methods: We used the Tufts Cost-Effectiveness Analysis registry to identify oncology CUAs published in Medline between 1976 and 2021.

View Article and Find Full Text PDF

Targeting signaling pathways that drive cancer cell migration or proliferation is a common therapeutic approach. A popular experimental technique, the scratch assay, measures the migration and proliferation-driven cell closure of a defect in a confluent cell monolayer. These assays do not measure dynamic effects.

View Article and Find Full Text PDF
Article Synopsis
  • Idiopathic pulmonary fibrosis (IPF) is a significant medical challenge with limited treatment options and ongoing research in the pharma and biotech sectors.
  • The currently approved therapies, nintedanib and pirfenidone, face issues regarding their effectiveness and side effects.
  • Many late-stage clinical trials have failed to show benefits for new drugs, but examining these failures could lead to better strategies for developing future treatments.
View Article and Find Full Text PDF

Background: Venous thromboembolism (VTE) in pregnancy is a major cause of maternal morbidity and mortality, and the use of preventive low-molecular-weight heparin (LMWH) can be challenging. Clinical guidelines recommend eliciting pregnant individuals' preferences towards the use of daily injections of LMWH and discussing the best option through a shared decision-making (SDM) approach. Our aim was to identify individuals' preferences concerning each of the main clinical outcomes, and categorize attributes influencing the use of LMWH during pregnancy.

View Article and Find Full Text PDF

Objectives: The objective of this study was to conduct a cost-utility analysis of osteochondroplasty with or without labral repair compared to arthroscopic lavage with or without labral repair for femoroacetabular impingement (FAI) from a Canadian public payer perspective.

Methods: A Markov model was constructed to compare the lifetime quality-adjusted life years (QALYs) and costs of the two treatment strategies. The target population was surgical FAI patients aged 36 years.

View Article and Find Full Text PDF

Open quantum systems often operate in the non-Markovian regime where a finite history of a trajectory is intrinsic to its evolution. The degree of non-Markovianity for a trajectory may be measured in terms of the amount of information flowing from the bath back into the system. In this study, we consider how information flows through the auxiliary density operators (ADOs) in the hierarchical equations of motion.

View Article and Find Full Text PDF

With recent outbreaks of foot-and-mouth disease (FMD) in Indonesia and Bali, industry, government and public concern for its incursion into Australia is increasing. The potential impact of an outbreak on the agricultural industry and national economy could be devastating. To date, research conducted in relation to FMD in Australia predominantly concerns simulations and models performed to predict various outcomes.

View Article and Find Full Text PDF

Single cancer cells within a tumor exhibit variable levels of resistance to drugs, ultimately leading to treatment failures. While tumor heterogeneity is recognized as a major obstacle to cancer therapy, standard dose-response measurements for the potency of targeted kinase inhibitors aggregate populations of cells, obscuring intercellular variations in responses. In this work, we develop an analytical and experimental framework to quantify and model dose responses of individual cancer cells to drugs.

View Article and Find Full Text PDF

Objectives: Critics of quality-adjusted life-years argue that it discriminates against older individuals. However, little empirical evidence has been produced to inform this debate. This study aimed to compare published cost-effectiveness analyses (CEAs) on patients aged ≥65 years and those aged <65 years.

View Article and Find Full Text PDF
Article Synopsis
  • Psoriatic arthritis (PsA) significantly affects work productivity and leisure activities, and this study aimed to evaluate the impact of biologic and targeted synthetic DMARDs on these factors.
  • A systematic review analyzed data from 12 studies involving 3,741 employed patients, measuring outcomes like absenteeism, presenteeism, and total work productivity using the Work Productivity and Activity Impairment Questionnaire (WPAI).
  • Results showed notable improvements in work productivity and activity impairment after 24 weeks of treatment, with total work productivity experiencing a mean relative improvement of 41%.
View Article and Find Full Text PDF

A first irradiation platform capable of delivering 10 MV X-ray beams at ultra-high dose rates (UHDR) has been developed and characterized for FLASH radiobiological research at TRIUMF. Delivery of both UHDR (FLASH mode) and low dose-rate conventional (CONV mode) irradiations was demonstrated using a common source and experimental setup. Dose rates were calculated using film dosimetry and a non-intercepting beam monitoring device; mean values for a 100 μA pulse (peak) current were nominally 82.

View Article and Find Full Text PDF
Article Synopsis
  • Axial spondyloarthritis (axSpA) significantly impacts work participation, leading to high levels of productivity loss, particularly due to presenteeism (being present at work but not fully functioning).
  • A systematic review analyzed 11 studies involving patients with axSpA starting treatment with biological and targeted synthetic drugs (b/tsDMARDs) to measure productivity changes over 12-16 weeks.
  • Results showed that patients on b/tsDMARDs improved their overall work productivity more than those on placebo, with annual cost savings from reduced productivity loss estimated between €11,962.88 and €14,293.54 per patient.
View Article and Find Full Text PDF

Introduction: Evaluating employee performance is important for organisational success however, limited research exists across the allied health workforce.

Objective: This study investigated allied health clinician and manager experiences and perceptions of the appropriateness of the performance and development (PAD) framework.

Design: A mixed methods design with purposive sampling was conducted in a medium size hospital and health service in regional Queensland to investigate the appropriateness of the PAD framework.

View Article and Find Full Text PDF
Article Synopsis
  • Venous thromboembolism (VTE) during pregnancy is a serious health risk, and low-molecular-weight heparin (LMWH) is commonly used to prevent it, but there are challenges in patient care that necessitate shared decision-making (SDM).
  • The study involved 22 healthcare professionals who were split into three groups, with each group receiving varying amounts of information and support related to the SDM process to assess its effectiveness on decision-making quality.
  • Results indicated that more comprehensive SDM interventions led to better decision-making experiences, though statistical differences were not significant, highlighting ongoing challenges in applying these strategies effectively in clinical settings.
View Article and Find Full Text PDF

We show that the second-order, two-time correlation functions for phonons and photons emitted from a vibronic molecule in a thermal bath result in bunching and antibunching (a purely quantum effect), respectively. Signatures relating to phonon exchange with the environment are revealed in photon-photon correlations. We demonstrate that cross-correlation functions have a strong dependence on the order of detection giving insight into how phonon dynamics influences the emission of light.

View Article and Find Full Text PDF
Article Synopsis
  • - The IMPACT-AF trial was conducted in Nova Scotia, Canada, to compare a computerized decision support system (CDS) for managing atrial fibrillation (AF) against traditional care practices in primary care settings.
  • - Researchers analyzed resource use and costs over a 12-month period using case costing data, questionnaires, and diaries from participants, finding that emergency visits and hospitalizations were the most significant costs related to AF care.
  • - Ultimately, the study found no significant cost differences between the CDS and usual care groups, highlighting the challenges of gathering economic data in clinical trials.
View Article and Find Full Text PDF
Article Synopsis
  • Mitochondria generate reactive oxygen species (ROS) that play a role in cell signaling and can influence cancer cell behavior directly through changes in mitochondrial shape (fission and fusion).
  • By promoting mitochondrial fission in triple negative breast cancer (TNBC) cells, researchers observed increased ROS levels, which led to decreased cell migration and reduced formation of structures essential for cell movement.
  • The study highlights that manipulating mitochondrial dynamics and ROS levels could provide new strategies for treating TNBC by hindering cancer cell migration.
View Article and Find Full Text PDF

Recent research offers good reason to think that various psychedelic drugs-including psilocybin, ayahuasca, ketamine, MDMA, and LSD-may have significant therapeutic potential in the treatment of various mental health conditions, including post-traumatic stress disorder, depression, existential distress, and addiction. Although the use of psychoactive drugs, such as Diazepam or Ritalin, is well established, psychedelics arguably represent a therapeutic step change. As therapies, their value would seem to lie in the subjective experiences they induce.

View Article and Find Full Text PDF

Objectives: To gain insight into formal methods of integrating patient preferences and clinical evidence to inform treatment decisions, we explored patients' experience with a personalised decision analysis intervention, for prophylactic low-molecular-weight heparin (LMWH) in the antenatal period.

Design: Mixed-methods explanatory sequential pilot study.

Setting: Hospitals in Canada (n=1) and Spain (n=4 sites).

View Article and Find Full Text PDF

Background: Utility scores are an important tool for evaluating health-related quality of life. Utility score norms have been published for Canadian adults, but no nationally representative utility score norms are available for children and youth.

Data And Methods: Health Utilities Index Mark 3 (HUI3) data from two recent cycles of the Canadian Health Measures Survey (i.

View Article and Find Full Text PDF

Unlabelled: Cancer cells reprogram energy metabolism through metabolic plasticity, adapting ATP-generating pathways in response to treatment or microenvironmental changes. Such adaptations enable cancer cells to resist standard therapy. We employed a coculture model of estrogen receptor-positive (ER+) breast cancer and mesenchymal stem cells (MSC) to model interactions of cancer cells with stromal microenvironments.

View Article and Find Full Text PDF

Objectives: To assess the 6-month incidence of laboratory-confirmed severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, postnatal care, hospitalization, and mortality among infants born to people with laboratory-confirmed SARS-CoV-2 infection during pregnancy by timing of maternal infection.

Methods: Using a cohort of liveborn infants from pregnancies with SARS-CoV-2 infections in the year 2020 from 10 United States jurisdictions in the Surveillance for Emerging Threats to Mother and Babies Network, we describe weighted estimates of infant outcomes from birth through 6 months of age from electronic health and laboratory records.

Results: Of 6601 exposed infants with laboratory information through 6 months of age, 1.

View Article and Find Full Text PDF

Background: Venous thromboembolism (VTE) in pregnancy is an important cause of maternal morbidity and mortality. Low-molecular-weight heparin (LMWH) is the cornerstone of prophylaxis and treatment of thrombotic events during pregnancy. LMWH has fewer adverse effects than other anticoagulants, does not cross the placenta, and is safe for the fetus.

View Article and Find Full Text PDF
Article Synopsis
  • The peritumoral stroma influences how cancer cells migrate during metastasis, with various biophysical and biochemical cues impacting their movement and survival, leading to differences in their ability to spread and resist treatments.
  • In this study, researchers created a synthetic stromal model to explore how changes in matrix density and mechanics affect the migration behaviors of MCF10A cells, a type of cancer cell, including modes like amoeboid and mesenchymal movement.
  • The findings suggest that specific matrix conditions can promote certain migration types, which affects how well cancer cells resist apoptosis (programmed cell death), highlighting the importance of the stromal microenvironment in developing cancer therapies that target these adaptive behaviors.
View Article and Find Full Text PDF