Publications by authors named "Allyn Hum"

Article Synopsis
  • - Patients with severe COVID-19 often experience rapid worsening of symptoms, particularly dyspnea, necessitating early involvement of specialist palliative care (SPC) for effective symptom management and end-of-life care.
  • - A study at the National Centre for Infectious Diseases in Singapore analyzed nonventilated COVID-19 patients between January 2021 and July 2022 to identify risk factors for high use of opioids and benzodiazepines in managing dyspnea.
  • - Findings revealed that patients with higher dyspnea scores and lower ISARIC-4C mortality scores were more likely to be high users of these medications, indicating they have increased oxygen needs and higher mortality rates, thus highlighting the need for timely
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Background: Clustering algorithms can identify distinct heart failure (HF) subgroups. The choice of algorithms, modelling process, and input variables can impact clustering outcomes. Therefore, we reviewed analytical methods and variables used in studies that performed clustering in patients with HF.

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Introduction: Symptom burden is a crucial factor for survival prognostication, but older adults may report fewer and less severe symptoms than younger patients. We investigated the impact of age on symptom severity and its prognostic implications in the prognostic model for advanced cancer (PRO-MAC).

Materials And Methods: Eight hundred forty subjects with incurable cancer, who were reviewed by palliative medicine at a tertiary university hospital, were categorized into four groups based on age: < 65 (young), 65-74 (young-old), 75-84 (old-old), and ≥ 85 (oldest-old) for comparison.

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Background: Patients with chronic lung diseases (CLDs), defined as progressive and life-limiting respiratory conditions, experience a heavy symptom burden as the conditions become more advanced, but palliative referral rates are low and late. Prognostic tools can help clinicians identify CLD patients at high risk of deterioration for needs assessments and referral to palliative care. As current prognostic tools may not generalize well across all CLD conditions, we aim to develop and validate a general model to predict one-year mortality in patients presenting with any CLD.

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Background: Many individuals with advanced dementia die in hospital, despite preferring home death. Existing evidence of factors affecting their place of death is inconsistent. To inform policies/practices for meeting needs/preferences, systematically establishing the evidence is pertinent, particularly given the exponential rise in advanced dementia prevalence.

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Identifying the evolving needs of patients with advanced heart failure (AdHF) and triaging those at high risk of death can facilitate timely referrals to palliative care and advance patient-centered individualized care. There are limited models specific for patients with end-stage HF. We aim to identify risk factors associated with up to three-year all-cause mortality (ACM) and describe prognostic models developed or validated in AdHF populations.

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Objectives: There is a lack of prognostic information to guide the prediction of short-term all-cause mortality in patients with end-stage renal disease (ESRD). The aim was to review the risk factors that influenced the risk of short-term all-cause mortality in patients with ESRD.

Methods: MEDLINE, Embase, PubMed, CINAHL, the Cochrane Library and Web of Science databases were searched for articles published between 2000 and 2020.

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We demonstrate the performance and workload impact of incorporating a natural language model, pretrained on citations of biomedical literature, on a workflow of abstract screening for studies on prognostic factors in end-stage lung disease. The model was optimized on one-third of the abstracts, and model performance on the remaining abstracts was reported. Performance of the model, in terms of sensitivity, precision, F1 and inter-rater agreement, was moderate in comparison with other published models.

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Patients with chronic lung disease (CLD) experience a heavy symptom burden at the end of life, but their uptake of palliative care is notably low. Having an understanding of a patient's prognosis would facilitate shared decision making on treatment options and care planning between patients, families, and their clinicians, and complement clinicians' assessments of patients' unmet palliative needs. While literature on prognostication in patients with chronic obstructive pulmonary disease (COPD) has been established and summarized, information for other CLDs remains less consolidated.

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Chronic diseases often lead to metabolic disorders, causing anabolic resistance and increased energy consumption, which result in cachexia. Cachexia, in turn, can lead to major clinical consequences such as impaired quality of life, shortened life expectancy, and increased healthcare expenditure. Existing international diagnostic criteria for cachexia employ thresholds derived from Western populations, which may not apply to Asians due to differing body compositions.

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Background: Challenges in prognosticating patients diagnosed with advanced dementia (AD) hinders timely referrals to palliative care. We aim to develop and validate a prognostic model to predict one-year all-cause mortality (ACM) in patients with AD presenting at an acute care hospital.

Methods: This retrospective cohort study utilised administrative and clinical data from Tan Tock Seng Hospital (TTSH).

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Objectives: The aims of this study are to identify the challenges faced by non-palliative care professionals (NPCPs) in caring for end-of-life patients; determine how these challenges interact with and influence each other systemically; and advance the theories and practices for supporting NPCPs in the provision of quality end-of-life care beyond the boundaries of palliative medicine.

Methods: A constructivist phenomenological research design with an Interpretive-Systemic Framework of inquiry was adopted. Thirty-five physicians, 35 nurses, and 35 Medical Social Workers who play critical roles in caring for end-of-life patients and belonging to the 9 major medical disciplines of Cardiology, Geriatric, Intensive Care Medicine, Internal Medicine, Nephrology, Neurology, Oncology, Respiratory Medicine, and Surgery were recruited through purposive snowball sampling from 3 major public hospitals.

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Objectives: The complex care needs and high mortality of critically ill patients in intensive care unit (ICU) warrants a team approach. While studies have affirmed the integral role of palliative care teams in ICU, little is known about the ICU healthcare professional's perception on how this integration affects the care of the critically ill.This study examines their perception of how integration of palliative care into ICU practice affects interprofessional collaborative practices and relationships in the delivery of care.

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Carcinomatosis meningitis is a rare but deadly complication of medulloblastoma. Surgical and systemic treatment options are often limited in advanced stages of the cancer. Meningeal irritation from raised intracranial pressure causes leptomeningeal pain that may respond poorly to opioids and common adjuvant analgesics.

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Patients who suffer from dyspnea while dying from COVID-19 are treated with opioids and benzodiazepines. In some instances, patients may experience refractory dyspnea at the end of life. Palliative sedation can be prescribed to alleviate such patients' suffering.

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Cancer affects older adults with varying levels of frailty, but cancer treatment is extrapolated from clinical trials involving predominantly young and robust subjects. Recent geriatric oncology randomised controlled trials (RCT) report that geriatric assessment leading to frailty-guided intervention reduces treatment-related toxicity whilst maintaining survival and improving quality of life (QoL). However, these positive results have not have been consistently reported in the literature.

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Interstitial lung disease (ILD) is associated with poor quality of life (QoL) and high symptom burden. Studies evaluating the benefits of palliative care examined mainly idiopathic pulmonary fibrosis (IPF) patients. We aim to examine the impact of palliative care on a broader group of fibrotic ILD patients.

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Objectives: Burnout is common among palliative care clinicians, occurring as a result of emotions experienced in caring for challenging patients or families. Awareness of these scenarios helps clinicians and teams appropriately manage their own emotions and prevent burnout. We studied challenging clinical situations and the emotions encountered by experienced palliative care clinicians which could potentially contribute to burnout.

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Objective: This study aims to quantify medical care utilisation, and to describe the cost trajectories of individuals with advanced illnesses in the last-year of life, differentiated by advanced cancer, end-stage organ failure and progressive neurological disorders.

Methods: This retrospective database study included decedents who had previous inpatient or outpatient encounters at a public hospital in Singapore. Patients with advanced diseases were identified based on diagnostic codes and clinical criteria.

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Objectives: Although patients living with end-stage organ disease (ESOD) suffer unmet needs from the physical and emotional burdens of living with chronic illness, they are less likely to receive palliative care.The aims of the study were to determine if palliative care referrals reduced healthcare utilisation and if impact on healthcare utilisation was dependent on the timing of the referral.

Methods: Patients with ESOD who received palliative care support were matched with those who did not using coarsened exact matching and propensity score matching, and compared in this retrospective cohort study.

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Background: Meeting patients' preferences for place of care at the end-of-life is an indicator of quality palliative care. Understanding the key elements required for terminal care within an integrated model may inform policy and practice, and consequently increase the likelihood of meeting patients' preferences. Hence, this study aimed to identify factors associated with the final place of care in patients with advanced cancer receiving integrated, home-based palliative care.

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Objectives: To realize patients' preferences for home death, this study aimed to identify factors associated with family caregiver burden of home-dwelling patients with advanced dementia and examine its relationship with end-of-life care treatment decisions.

Design: A prospective cohort study.

Setting And Participants: Patient-family caregiver dyads enrolled in a home-based palliative care program for patients with advanced dementia, with family caregiver burden assessed using the Zarit Burden Interview (ZBI) on enrolment, were included.

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Purpose: The Singapore Caregiver Quality of Life Scale - Dementia (SCQOLS-D), developed based on the Singapore Caregiver Quality of Life Scale (SCQOLS), comprises 5 domains and 63 items. It has been shown to be a valid and reliable measurement scale. This study aimed to develop and evaluate a short form of the SCQOLS-D.

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Objectives: The Integrated Care for Advanced REspiratory Disorders (ICARE) service is a stay-in, post-acute care program for hospitalized patients with chronic, nonmalignant lung diseases. It provides palliative rehabilitation-a novel model integrating functional rehabilitation with early palliative care. We compare reduction of health care utilization among ICARE participants vs matched controls receiving usual care.

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Background: Many older adults with severe dementia receive potentially life-extending treatments even when caregivers do not wish to prolong their life inappropriately.

Objective: Explore factors that influence caregiver preferences for potentially life-extending treatments for older adults with severe dementia, and reasons for discordance between overall end-of-life care goal and treatment preferences.

Design: Semi-structured in-depth interviews asking caregivers their overall end-of-life care goal for older adults and preferences for intravenous (IV) antibiotics, tube feeding and cardiopulmonary resuscitation (CPR).

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