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"Bonares, Michael"
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Association between Chinese or South Asian ethnicity and end-of-life care in Ontario, Canada
2020
Ethnicity may be associated with important aspects of end-of-life care, such as what treatments are received, access to palliative care and where people die. However, most studies have focused on end-of-life care of white, Hispanic and black patients. We sought to compare end-of-life care delivered to people of Chinese and South Asian ethnicity with that delivered to others from the general population, in Ontario, Canada.
In this population-based cohort study, we included all people who died in Ontario, Canada, between Apr. 1, 2004, and Mar. 31, 2015. People were identified as having Chinese or South Asian ethnicity on the basis of a validated surname algorithm. We used modified Poisson regression analyses to assess location of death and care received in the last 6 months of life.
We analyzed 967 339 decedents, including 18 959 (2.0%) of Chinese and 11 406 (1.2%) of South Asian ethnicity. Chinese (13.6%) and South Asian (18.5%) decedents were more likely than decedents from the general population (10.1%) to die in the intensive care unit (ICU). The adjusted relative risk of dying in intensive care was 1.21 (95% confidence interval [CI] 1.15 to 1.27) for Chinese and 1.25 (95% CI 1.20 to 1.30) for South Asian decedents. In their last 6 months of life, decedents of Chinese and South Asian ethnicity experienced significantly more ICU admission, hospital admission, mechanical ventilation, dialysis, percutaneous feeding tube placement, tracheostomy and cardiopulmonary resuscitation than the general population.
Decedents of Chinese and South Asian ethnicity in Ontario were more likely than decedents from the general population to receive aggressive care and to die in an ICU. These findings may be due to communication difficulties between patients and clinicians, differences in preferences about end-of-life care or differences in access to palliative care services.
Journal Article
Presence of urinary symptoms in bacteremic urinary tract infection: a retrospective cohort study of Escherichia coli bacteremia
2020
Background
It is important to understand clinical features of bacteremic urinary tract infection (bUTI), because bUTI is a serious infection that requires prompt diagnosis and antibiotic therapy.
Escherichia coli
is the most common and important uropathogen. The objective of our study was to characterize the clinical presentation of
E coli
bUTI.
Methods
Retrospective cohort study of consecutive adult patients admitted for community acquired
E. coli
bacteremia from January 1, 2015 to December 31, 2016 was conducted at 4 acute care academic and community hospitals in Toronto, Ontario, Canada. Logistic regression models were developed to identify
E coli
bUTI cases without urinary symptoms.
Results
Of 462 patients with
E. coli
bacteremia, 284 (61.5%) patients had a urinary source. Of these 284 patients, 161 (56.7%) had urinary symptoms. In a multivariable model, bUTI without urinary symptoms were associated with older age (age < 65 years as reference, age 65–74 years had OR of 2.13 95% CI 0.99–4.59
p
= 0.0523; age 75–84 years had OR of 1.80 95% CI 0.91–3.57
p
= 0.0914; age > =85 years had OR of 2.95 95% CI 1.44–6.18
p
= 0.0036) and delirium (OR of 2.12 95% CI 1.13–4.03
p
= 0.0207). Sepsis by SIRS criteria was present in 274 (96.5%) of all bUTI cases and 119 (96.8%) of bUTI cases without urinary symptoms.
Conclusion
The majority of patients with
E. coli
bacteremia had a urinary source. A significant proportion of bUTI cases had no urinary symptoms elicited on history. Elderly and delirious patients were more likely to have bUTI without urinary symptoms. In elderly and delirious patients with sepsis by SIRS criteria but without a clear infectious source, clinicians should suspect, investigate, and treat for bUTI.
Journal Article
Development and validation of a clinical prediction tool to estimate survival in community-dwelling adults living with dementia: a protocol
2024
IntroductionA clinical prediction tool to estimate life expectancy in community-dwelling individuals living with dementia could inform healthcare decision-making and prompt future planning. An existing Ontario-based tool for community-dwelling elderly individuals does not perform well in people living with dementia specifically. This study seeks to develop and validate a clinical prediction tool to estimate survival in community-dwelling individuals living with dementia receiving home care in Ontario, Canada.Methods and analysisThis will be a population-level retrospective cohort study that will use data in linked healthcare administrative databases at ICES. Specifically, data that are routinely collected from regularly administered assessments for home care will be used. Community-dwelling individuals living with dementia receiving home care at any point between April 2010 and March 2020 will be included (N≈200 000). The model will be developed in the derivation cohort (N≈140 000), which includes individuals with a randomly selected home care assessment between 2010 and 2017. The outcome variable will be survival time from index assessment. The selection of predictor variables will be fully prespecified and literature/expert-informed. The model will be estimated using a Cox proportional hazards model. The model’s performance will be assessed in a temporally distinct validation cohort (N≈60 000), which includes individuals with an assessment between 2018 and 2020. Overall performance will be assessed using Nagelkerke’s R2, discrimination using the concordance statistic and calibration using the calibration curve. Overfitting will be assessed visually and statistically. Model performance will be assessed in the validation cohort and in prespecified subgroups.Ethics and disseminationThe study received research ethics board approval from the Sunnybrook Health Sciences Centre (SUN-6138). Abstracts of the project will be submitted to academic conferences, and a manuscript thereof will be submitted to a peer-reviewed journal for publication. The model will be disseminated on a publicly accessible website (www.projectbiglife.com).Trial registration number NCT06266325 (clinicaltrials.gov).
Journal Article
Palliative care utilisation in migrant populations: protocol for a scoping review
by
Chakraborty, Anita
,
Lau, Christine
,
Nolen, Amy
in
Adult palliative care
,
Grey literature
,
Health Equity
2026
IntroductionMigrants are vulnerable to structural barriers that compromise their health status and simultaneously decrease their access to healthcare, including palliative care. Literature on palliative care access in migrant populations is limited by a focus on migration to high-income countries; under-representation of refugees, asylum seekers and migrant workers; and no investigation of intersectional factors. We seek to conduct a scoping review of palliative care utilisation in migrant populations, including both academic and grey literature, including articles from low- to middle-income countries and about refugees, asylum seekers and migrant workers. The review will map out what is already known and what remains unknown about palliative care utilisation in migrants; identify the factors associated with palliative care utilisation; and determine the extent to which intersectionality has been examined.Methods and analysisThis scoping review will adhere to the methodological framework developed by the Joanna Briggs Institute, and reporting will be in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews reporting guidelines. A search strategy developed by a health sciences librarian will be conducted on Ovid MEDLINE, Embase, CINAHL and PsycINFO in addition to grey literature sources up to 7 July 2025. Articles will be included if they studied migrant populations and reported on palliative care utilisation. Two independent reviewers will screen titles and abstracts and review full texts. Data extraction will be performed independently and in duplicate using a standardised, pilot-tested form. Findings will be synthesised thematically, with particular attention to countries of destination, migrant subgroups and intersectional factors.Ethics and disseminationSince this is a scoping review and uses only previously published data, it does not require approval by a research ethics board. Findings will be disseminated as an abstract for presentation at a palliative care conference and a manuscript for publication in a peer-reviewed journal.Trial registration numberOpen Science Framework (gy75v).
Journal Article
Study protocol for the development and validation of a clinical prediction tool to estimate the risk of 1-year mortality among hospitalized patients with dementia
by
Fisher, Stacey
,
Wentlandt, Kirsten
,
Tanuseputro, Peter
in
Advance care planning
,
Advance directives
,
Biomedicine
2024
Background
Patients with dementia and their caregivers could benefit from advance care planning though may not be having these discussions in a timely manner or at all. A prognostic tool could serve as a prompt to healthcare providers to initiate advance care planning among patients and their caregivers, which could increase the receipt of care that is concordant with their goals. Existing prognostic tools have limitations. We seek to develop and validate a clinical prediction tool to estimate the risk of 1-year mortality among hospitalized patients with dementia.
Methods
The derivation cohort will include approximately 235,000 patients with dementia, who were admitted to hospital in Ontario from April 1st, 2009, to December 31st, 2017. Predictor variables will be fully prespecified based on a literature review of etiological studies and existing prognostic tools, and on subject-matter expertise; they will be categorized as follows: sociodemographic factors, comorbidities, previous interventions, functional status, nutritional status, admission information, previous health care utilization. Data-driven selection of predictors will be avoided. Continuous predictors will be modelled as restricted cubic splines. The outcome variable will be mortality within 1 year of admission, which will be modelled as a binary variable, such that a logistic regression model will be estimated. Predictor and outcome variables will be derived from linked population-level healthcare administrative databases. The validation cohort will comprise about 63,000 dementia patients, who were admitted to hospital in Ontario from January 1st, 2018, to March 31st, 2019. Model performance, measured by predictive accuracy, discrimination, and calibration, will be assessed using internal (temporal) validation. Calibration will be evaluated in the total validation cohort and in subgroups of importance to clinicians and policymakers. The final model will be based on the full cohort.
Discussion
We seek to develop and validate a clinical prediction tool to estimate the risk of 1-year mortality among hospitalized patients with dementia. The model would be integrated into the electronic medical records of hospitals to automatically output 1-year mortality risk upon hospitalization. The tool could serve as a trigger for advance care planning and inform access to specialist palliative care services with prognosis-based eligibility criteria. Before implementation, the tool will require external validation and study of its potential impact on clinical decision-making and patient outcomes.
Trial registration
NCT05371782.
Journal Article
Salmonella Thompson splenic abscess in a healthy female
by
Bonares, Michael J
,
Ying, Thomas
,
Patel, Yashesh
in
19-30 years
,
Abdomen
,
Abscess - complications
2017
A 26-year-old woman presented with a 5-day history of fever and 3-day history of left upper quadrant abdominal pain and cough associated with left shoulder tip pain. Initial blood cultures did not display growth. On CT imaging, there was a cyst measuring 7.2×8 cm originally interpreted to be haemorrhagic in nature. Repeat cultures during admission revealed Salmonella Thompson. Percutaneous drainage and antibiotic treatment, rather than splenectomy, was successfully pursued with the patient afebrile and in no pain at 6 weeks follow-up.
Journal Article
Behavioral profile of unruptured intracranial aneurysms: a systematic review
by
Bonares, Michael J.
,
Oliveira Manoel, A. Leonardo
,
Schweizer, Tom A.
in
Aneurysms
,
Cognition & reasoning
,
Employment
2014
Objectives To systematically review the literature on the neuropsychological, psychosocial, and functional profiles of patients with unruptured intracranial aneurysms. Methods This review was limited to peer‐reviewed research articles that reported cognitive, psychosocial, and/or functional profiles of patients with unruptured intracranial aneurysms. Studies were identified through Medline and PsychINFO by searching “(unruptured [intracranial OR cerebral] aneurysm) AND (cogniti* OR neuropsycholog* OR anxiety OR depression OR [quality of life] OR work OR employment OR [activities of daily living] OR [instrumental activities of daily living]).” Only articles that were published since January 1997 were considered. Reference lists of included articles were inspected for additional studies. Only articles in English were included. Case studies were excluded. Twenty‐two articles were included in this review. Results The literature demonstrates that although treatment for unruptured intracranial aneurysms allays anxiety, it also results in an observable, though transient decline in cognition and daily functioning. Even before treatment, preliminary evidence hints that these patients are not free of such impairments. Conclusions The algorithm that underlies the decision to treat an unruptured intracranial aneurysm ought to add more weight to the neuropsychological, psychosocial, and functional profiles of these patients. The clinical relevance of these patients does not begin and end with their risk of rupture.
Journal Article
Palliative care integration into outpatient heart failure management: pilot study
by
Poon, Stephanie
,
Nadarajah, Shamara
,
Sirianni, Giovanna
in
Advance care planning
,
Advance directives
,
Cardiology
2024
ObjectivesPeople with heart failure have palliative care needs yet services remain underused. The heart failure clinic is a potential setting for initial palliative care delivery though evidence for such services is lacking. We explored the outcomes of an embedded model of palliative medicine within a heart failure clinic.MethodsWe conducted a retrospective cohort study of individuals who received a palliative medicine consultation in a heart failure clinic. Descriptive statistics were used to characterise the cohort and their outcomes, and the McNemar test to compare rates of advance care planning before/after consultation.ResultsMajority of individuals who received a palliative medicine consultation experienced New York Heart Association (NYHA) class II symptoms (65.5%) and had a Palliative Performance Scale score of≥60% (66.8%). While only 17% engaged in advance care planning in the year before consultation, 93% had advance care planning during the first consultation (p<0.001). Care was provided in multiple domains including advance care planning (95%), symptom management (97%) and caregiver support (30%), regardless of the reason for referral.ConclusionsOur embedded model of palliative medicine within the heart failure clinic was associated with increased advance care planning at a time when patients were functional and minimally symptomatic. Further research should substantiate these findings at other sites.
Journal Article
Development and Validation of a Clinical Prediction Tool for Estimating the Risk of 1-Year Mortality Among Hospitalized Patients with Dementia
2023
Advance care planning (ACP) has an established benefit among dementia patients though may happen infrequently, which could contribute to goal-discordant end-of-life care. A prognostic tool could serve as a trigger for ACP. We sought to develop and test a clinical tool to predict the risk of 1-year mortality among hospitalized dementia patients. Population-level linked healthcare administrative databases in Ontario were used. In a cohort of 235667 patients hospitalized from 2009-2017, we developed a tool with 76 predictor variables (sociodemographic factors, comorbidities, previous interventions, functional status, nutritional status, admission-specific information, previous healthcare utilization). In a cohort of 62909 patients hospitalized from 2018-2019, the tool demonstrated acceptable discrimination (c statistic=0.796). It demonstrated acceptable calibration in the validation cohort (mean relative difference=-3.29%) and subgroups of meaning to clinicians and policy-makers. This model could be integrated into electronic medical records as an automated prognostic tool, which could prompt ACP among hospitalized dementia patients.
Dissertation
Pulmonary referrals to specialist palliative medicine: a survey
by
Christiansen, David
,
Lau, Christine
,
Mah, Kenneth
in
Cancer
,
chronic conditions
,
Chronic illnesses
2024
ObjectivesPatients with chronic respiratory disease have significant palliative care needs, but low utilisation of specialist palliative care (SPC) services. Decreased access to SPC results in unmet palliative care needs among this patient population. We sought to determine the referral practices to SPC among respirologists in Canada.MethodsRespirologists across Canada were invited to participate in a survey about their referral practices to SPC. Associations between referral practices and demographic, professional and attitudinal factors were analysed using regression analyses.ResultsThe response rate was 64.7% (438/677). Fifty-nine per cent of respondents believed that their patients have negative perceptions of palliative care and 39% were more likely to refer to SPC earlier if it was renamed supportive care. While only 2.7% never referred to SPC, referral was late in 52.6% of referring physicians. Lower frequency of referral was associated with equating palliative care to end-of-life care (p<0.001), male sex of respirologist (p=0.019), not knowing referral criteria of SPC services (p=0.015) and agreement that SPC services prioritise patients with cancer (p=0.025); higher referral frequency was associated with satisfaction with SPC services (p=0.001). Late referral was associated with equating palliative care to end-of-life care (p<0.001) and agreement that SPC services prioritise patients with cancer (p=0.013).ConclusionsPossible barriers to respirologists’ timely SPC referral include misperceptions about palliative care, lack of awareness of referral criteria and the belief that SPC services prioritise patients with cancer. Future studies should confirm these barriers and evaluate the effectiveness of strategies to overcome them.
Journal Article