Surain B. Roberts
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View article: Interpretable Fine-Gray Deep Survival Model for Competing Risks: Predicting Post-Discharge Foot Complications for Diabetic Patients in Ontario
Interpretable Fine-Gray Deep Survival Model for Competing Risks: Predicting Post-Discharge Foot Complications for Diabetic Patients in Ontario Open
Model interpretability is crucial for establishing AI safety and clinician trust in medical applications for example, in survival modelling with competing risks. Recent deep learning models have attained very good predictive performance bu…
View article: Applying an implementation science lens to understand physician-level variation in patient length of stay in internal medicine
Applying an implementation science lens to understand physician-level variation in patient length of stay in internal medicine Open
Background & objectives Length of Stay (LoS) is a critical quality metric and focus of improvement efforts in healthcare. Successfully managing LoS depends on understanding the drivers of variation amenable to change. This study aims to (1…
View article: Evaluating the process of care for persons admitted to Toronto area hospitals with acute severe ulcerative colitis
Evaluating the process of care for persons admitted to Toronto area hospitals with acute severe ulcerative colitis Open
Background Acute severe ulcerative colitis (ASUC) is associated with significant morbidity. In patients with ulcerative colitis (UC), the estimated lifetime risk of developing severe colitis is 25%. Several gastrointestinal societies have …
View article: Patient Complexity, Social Factors, and Hospitalization Outcomes at Academic and Community Hospitals
Patient Complexity, Social Factors, and Hospitalization Outcomes at Academic and Community Hospitals Open
Importance There have been limited evaluations of the patients treated at academic and community hospitals. Understanding differences between academic and community hospitals has relevance for the design of clinical models of care, remuner…
View article: Clinical impact of Choosing Wisely Canada hepatology recommendations: an interrupted time-series analysis using data from GEMINI
Clinical impact of Choosing Wisely Canada hepatology recommendations: an interrupted time-series analysis using data from GEMINI Open
Introduction Choosing Wisely Canada (CWC) Hepatology published recommendations in 2017 aiming to reduce low-value care and testing, including serum ammonia tests for hepatic encephalopathy (HE) and transfusion of blood products for minor i…
View article: pyDeid: an improved, fast, flexible, and generalizable rule-based approach for deidentification of free-text medical records
pyDeid: an improved, fast, flexible, and generalizable rule-based approach for deidentification of free-text medical records Open
Objectives Deidentification of personally identifiable information in free-text clinical data is fundamental to making these data broadly available for research. However, there exist gaps in the deidentification landscape with regard to th…
View article: Variation in Case Exposure During Internal Medicine Residency
Variation in Case Exposure During Internal Medicine Residency Open
Importance Variation in residency case exposure affects resident learning and readiness for future practice. Accurate reporting of case exposure for internal medicine (IM) residents is challenging because feasible and reliable methods for …
View article: On-site ERCP availability and cholangitis outcomes: Retrospective cohort study
On-site ERCP availability and cholangitis outcomes: Retrospective cohort study Open
Endoscopic retrograde cholangiopancreatography (ERCP) is important in acute cholangitis (AC) management but is not available at all hospitals. The association between on-site ERCP availability and cholangitis outcomes is unknown. We includ…
View article: Effect of disability, homelessness, and neighborhood marginalization on risk adjustment for hospital performance measurement
Effect of disability, homelessness, and neighborhood marginalization on risk adjustment for hospital performance measurement Open
It is not known how disability, homelessness, or neighborhood marginalization influence risk-adjusted hospital performance measurement in a universal health care system. In this study, we evaluated the effect of including these equity-rela…
View article: Using newly linked hospital and population data to identify opportunities to reduce harms from sedative-hypnotic prescribing at population scale
Using newly linked hospital and population data to identify opportunities to reduce harms from sedative-hypnotic prescribing at population scale Open
Objective and ApproachSedative-hypnotic medications are associated with harms such as delirium and falls, and may be overprescribed in hospitals. Measuring potentially inappropriate in-hospital sedative-hypnotic prescriptions requires dist…
View article: Loss of biochemical response at any time worsens outcomes in UDCA-treated patients with primary biliary cholangitis
Loss of biochemical response at any time worsens outcomes in UDCA-treated patients with primary biliary cholangitis Open
Early biochemical response to ursodeoxycholic acid is associated with good prognosis in patients with primary biliary cholangitis (PBC). Our work demonstrates that patients with PBC transition between biochemical response states over time,…
View article: Real‐world use of glucocorticoids and clinical outcomes in adults hospitalized with community‐acquired pneumonia on medical wards
Real‐world use of glucocorticoids and clinical outcomes in adults hospitalized with community‐acquired pneumonia on medical wards Open
Background Little is known about the real‐world use of systemic glucocorticoids to treat patients hospitalized with community‐acquired pneumonia (CAP) outside of the intensive care unit (ICU). Methods This retrospective cohort study includ…
View article: Development and external validation of tools for categorizing diagnosis codes in international hospital data
Development and external validation of tools for categorizing diagnosis codes in international hospital data Open
The Clinical Classification Software Refined (CCSR) is a tool that groups many thousands of International Classification of Diseases 10th Revision (ICD-10) diagnosis codes into approximately 500 clinically meaningful categories, simplifyin…
View article: Treatment response and clinical event-free survival in autoimmune hepatitis: A Canadian multicentre cohort study
Treatment response and clinical event-free survival in autoimmune hepatitis: A Canadian multicentre cohort study Open
View article: Validity of hospital diagnostic codes to identify SARS-CoV-2 infections in reference to polymerase chain reaction results: a descriptive study
Validity of hospital diagnostic codes to identify SARS-CoV-2 infections in reference to polymerase chain reaction results: a descriptive study Open
The sensitivity, specificity, PPV and NPV of code U07.1 were high. This supports using code U07.1 to identify SARS-CoV-2 infection in hospitalization data.
View article: An Update to the Kaiser Permanente Inpatient Risk Adjustment Methodology Accurately Predicts In-Hospital Mortality: a Retrospective Cohort Study
An Update to the Kaiser Permanente Inpatient Risk Adjustment Methodology Accurately Predicts In-Hospital Mortality: a Retrospective Cohort Study Open
View article: Analysis of Resident and Attending Physician End-of-Rotation Changeover Days and Association With Patient Length of Stay
Analysis of Resident and Attending Physician End-of-Rotation Changeover Days and Association With Patient Length of Stay Open
Importance End-of-rotation resident physician changeover is a key part of postgraduate training but could lead to discontinuity in patient care. Objective To test whether patients exposed to end-of-rotation resident changeover have longer …
View article: Imaging delays among medical inpatients in Toronto, Ontario: A cohort study
Imaging delays among medical inpatients in Toronto, Ontario: A cohort study Open
Background Imaging procedures are commonly performed on hospitalized patients and waiting for these could increase length-of-stay. The study objective was to quantify delays for imaging procedures in General Internal Medicine and identify …
View article: A simplification of the Kaiser Permanente inpatient risk adjustment methodology accurately predicted in-hospital mortality: A retrospective cohort study
A simplification of the Kaiser Permanente inpatient risk adjustment methodology accurately predicted in-hospital mortality: A retrospective cohort study Open
Objective We simplified and evaluated the Kaiser Permanente inpatient risk adjustment methodology (KP method) to predict in-hospital mortality, using open-source tools to measure comorbidity and diagnosis groups, and removing troponin, whi…
View article: Characterizing the burden of biliary tract cancers across 28 hospitals in Ontario, Canada
Characterizing the burden of biliary tract cancers across 28 hospitals in Ontario, Canada Open
View article: Tools for categorization of diagnostic codes in hospital data: Operationalizing CCSR into a patient data repository
Tools for categorization of diagnostic codes in hospital data: Operationalizing CCSR into a patient data repository Open
Background The Clinical Classification Software refined version (CCSR) is a tool to aggregate International Classification of Diseases, 10th Revision, Clinical Modification/Procedure Coding System (ICD-10-CM/PCS) diagnosis codes into clini…
View article: Editorial: liver disease in secondary care—‘money or your life’. Authors' reply
Editorial: liver disease in secondary care—‘money or your life’. Authors' reply Open
LINKED CONTENT This article is linked to Roberts et al and Trivedi papers. To view these articles, visit https://doi.org/10.1111/apt.16488 and https://doi.org/10.1111/apt.16540
View article: Symptom burden in patients living with primary biliary cholangitis: indigenous Canadians report significantly higher PBC-40 quality of life scores
Symptom burden in patients living with primary biliary cholangitis: indigenous Canadians report significantly higher PBC-40 quality of life scores Open
View article: Real‐World Effectiveness of Obeticholic Acid in Patients with Primary Biliary Cholangitis
Real‐World Effectiveness of Obeticholic Acid in Patients with Primary Biliary Cholangitis Open
Patients with primary biliary cholangitis (PBC) with incomplete response to ursodeoxycholic acid are at risk of disease progression and need additional therapy. Obeticholic acid (OCA) was approved in Canada in May 2017, but its effectivene…
View article: Inter‐rater reliability of h‐index scores calculated by Web of Science and Scopus for clinical epidemiology scientists
Inter‐rater reliability of h‐index scores calculated by Web of Science and Scopus for clinical epidemiology scientists Open
Objective We investigated the inter‐rater reliability of Web of Science ( W o S ) and Scopus when calculating the h‐index of 25 senior scientists in the C linical E pidemiology P rogram of the O ttawa H ospital R esearch I nstitute. Materi…