Centers In Ontario Research Articles

Trends and Self-Management Predictors of Glycemic Control During Pregnancy in Women With Preexisting Type 1 or Type 2 Diabetes: A Cohort Study.

Because much of diabetes management during pregnancy occurs at home, self-management factors such as self-efficacy, self-care activities, and care satisfaction may affect glycemia. Our objective was to explore trends in glycemic control during pregnancy in women with type 1 or type 2 diabetes; assess self-efficacy, self-care, and care satisfaction; and examine these factors as predictors of glycemic control. We conducted a cohort study from April 2014 to November 2019 at a tertiary center in Ontario, Canada. Self-efficacy, self-care, care satisfaction, and A1C were measured three times during pregnancy (T1, T2, and T3). Linear mixed-effects modeling explored trends in A1C and examined self-efficacy, self-care, and care satisfaction as predictors of A1C. We recruited 111 women (55 with type 1 diabetes and 56 with type 2 diabetes). Mean A1C significantly decreased by 1.09% (95% CI -1.38 to -0.79) from T1 to T2 and by 1.14% (95% CI -1.43 to -0.86) from T1 to T3. Self-efficacy significantly predicted glycemic control for women with type 2 diabetes and was associated with a mean change in A1C of -0.22% (95% CI -0.42 to -0.02) per unit increase in scale. The exercise subscore of self-care significantly predicted glycemic control for women with type 1 diabetes and was associated with a mean change in A1C of -0.11% (95% CI -0.22 to -0.01) per unit increase in scale. Self-efficacy significantly predicted A1C during pregnancy in a cohort of women with preexisting diabetes in Ontario, Canada. Future research will continue to explore the self-management needs and challenges in women with preexisting diabetes in pregnancy.

NURSE PRACTITIONER–LED IMPLEMENTATION OF HUDDLES TO SUPPORT STAFF IN LONG-TERM CARE HOMES

Abstract Staff working in long-term care (LTC) homes frequently report experiencing moral distress related to lack of autonomy and not being able to provide quality care. Huddles have been used as a communication tool for many years in acute care settings to improve collaboration and safety culture. In LTC homes, huddles are implemented less often, despite evidence of their benefits in improving support and teamwork. In this pre-test post-test implementation study, huddles led by a nurse practitioner (NP) were introduced in a privately-owned not-for-profit LTC home with < 150 beds, located in a medium urban centre in Ontario, Canada. Objectives of the study were to 1) examine fidelity of huddle implementation; 2) examine the extent to which the huddles improved staff’ outcomes of moral distress, job satisfaction, and support provided by the NP estimated with Bayesian proportional odds model. A total of 48 huddles were carried out by the NP over 15 weeks. Huddles were most commonly attended by personal support workers (98%) and registered practical nurses (96%), with an average of 7 individuals per huddle. Topics most often addressed at huddles were related to resident care (46%) and staff concerns (34%). Strong statistical evidence of a reduction in overall moral distress was evident for staff attending the huddles, when compared to staff who did not (posterior probability =.9933). No changes in job satisfaction and support provided by the NP were observed. Introducing huddles in LTC homes may be effective at reducing moral distress experienced by staff.

Association of prescribed oral stimulants on cocaine use among patients enrolled in opioid agonist treatment: A retrospective longitudinal cohort study.

The objective of this study was to measure the association of prescribed oral stimulants with the consumption of cocaine among a population of patients receiving Opioid Agonist Therapy (OAT). The study was a retrospective clinical cohort study using the medical records of all patients receiving OAT who attended treatment clinics within the Canadian Addiction Treatment Centers (CATC) in Ontario from April 2014 to February 2021. Linear mixed-effects models were fit for the exposure of prescribed oral stimulants, and the outcome of a positive urinalysis drug screen for cocaine. Covariates for age, sex, and a random effect for patients were fitted to account for differences between and within patient observations over time. Among patients receiving OAT therapy n = 314 patients were prescribed oral stimulants and n = 11,879 patients were not prescribed oral stimulants among Ontario CATC clinics (n = 92, n = 145 physicians), the mean age at enrollment for patients receiving oral stimulants was 37.0, SD = 8.8, with 43.6% female patients and for patients not receiving oral stimulants mean age was 36.6, SD = 10.7, with 39.6% female patients. Linear mixed effects models showed no difference in cocaine-positive urine tests over time for fixed effects B = 0.001, however, when considering the Interclass correlation coefficient (ICC) between the fixed effects, we found that time since the prescription of an oral stimulant was associated with a decrease of ICC = -0.14 in cocaine positive urine tests. Increasing age at prescription ICC = -0.92, and being male ICC = -0.23 were associated with decreasing cocaine-positive urine. The use of oral stimulant prescriptions to treat cocaine use had no clinically significant benefit in a real-world setting. Patients who receive prescriptions for oral stimulants consume more cocaine before and after treatment compared to patients without an oral stimulant prescription. We also observed that cocaine use was reduced with increased time since treatment initiation.

UnCHAARTED territory: The role of docetaxel rechallenge following chemohormonal therapy for metastatic castration-sensitive prostate cancer.

To assess the effectiveness of docetaxel rechallenge (DR) for metastatic castration-resistant prostate cancer (mCRPC) following chemohormonal therapy for metastatic castrate-sensitive prostate cancer (mCSPC). Additionally, we sought to define clinical factors predicting treatment response. Retrospective analysis of men treated with docetaxel for mCSPC and then rechallenged in the mCRPC setting from four cancer centers in Ontario, Canada. Prostate specific antigen (PSA) response, progression-free survival (PFS), and overall survival (OS) following DR were evaluated. Fifty five patients were identified between 2015 and 2020. Prior to DR, 94.5% of patients received androgen-receptor axis targeted therapy, 20% received radium-223, and 1.8% received cabazitaxel. Among 54 evaluable patients, 27.8% had a PSA decline ≥50%. Median PFS was 4.1 months (95% CI, 2.1-4.8) and median OS from androgen deprivation therapy initiation was 38.3 months (95% CI, 32.9-41.0). A Gleason Score of ≥8 was an independent predictor of prolonged PFS (HR 0.32, 95% CI, 0.12-0.81; P=0.02). DR following chemohormonal therapy for mCSPC produced a meaningful PSA response in approximately one-quarter of patients, with relatively short PFS. The impact of Gleason Score on docetaxel response warrants further investigation.

A Random Forest Classification Model for Spasticity after Stroke

<h3>Research Objectives</h3> The objective of this analysis was to developed a Random Forest Classification Model to determine which sociodemographic and clinical health characteristics predict the development of post-stroke spasticity (PSS). <h3>Design</h3> Random Forest Classification Modelling with data collected from a retrospective review of patients' medical charts and the National Rehabilitation Reporting System. <h3>Setting</h3> Specialized stroke rehabilitation inpatient and outpatient units from a large, urban centre in Ontario, Canada. <h3>Participants</h3> A total of 922 individuals (102 spastic) attended stroke rehabilitation between July 1, 2015 and June 30, 2020. A synthetic minority oversampling technique was used to generate a dataset of 1632 individuals (408 spastic). <h3>Interventions</h3> None. <h3>Main Outcome Measures</h3> Clinical health data (i.e., number, type and location of stroke, age at stroke), length of stay, LOS); presence of spasticity, presence of aphasia, endovascular or tissue plasminogen activator treatment, Chedoke-McMaster impairment inventory scores, Functional Independence Measure motor and cognitive sub-scores. <h3>Results</h3> Based on the results of a feature hyper-parameterization procedure, a model with 1501 trees was selected with 8 variables (mtry=8). A random forest model was then trained using these parameters on 80% of the dataset. The relative importance of predictor variables was assessed by examining the decrease in model accuracy when a particular variable is permutated. Chedoke McMaster impairment scores, age at stroke onset, Functional Independence Measure motor sub-scores and length of stay appear to be the most important predictor variables when compared to the remaining 7. When testing the model performance on the untrained 20% of the dataset, the model performed with a balanced accuracy of 82.5%, a Cohen's kappa value of 0.71 and a spasticity classification error of 32.1%. <h3>Conclusions</h3> Overall, our model performed relatively well, but could be tuned more for sensitivity to prioritize the correct identification of spasticity. In the future, more data will be required to validate the generalizability of the model and robustness of fit, as well as to eliminate the need for synthetically created data. <h3>Author(s) Disclosures</h3> None.

Centralized Triage of Suspected Coronary Artery Disease Using Coronary Computed Tomographic Angiography to Optimize the Diagnostic Yield of Invasive Angiography

BackgroundCoronary computed tomographic angiography (CCTA) is preferable to invasive coronary angiography (ICA) for coronary artery disease (CAD) diagnosis in elective patients without known CAD. MethodsWe conducted a nonrandomized interventional study involving 2 tertiary care centres in Ontario. From July 2018 to February 2020, outpatients referred for elective ICA were identified through a centralized triage process and were recommended to undergo CCTA first instead of ICA. Patients with borderline or obstructive CAD on CCTA were recommended to undergo subsequent ICA. Intervention acceptability, fidelity, and effectiveness were assessed. ResultsA total of 226 patients were screened, with 186 confirmed to be eligible, of whom 166 had patient and physician approval to proceed with CCTA (89% acceptability). Among consenting patients, 156 (94%) underwent CCTA first; 43 (28%) had borderline/obstructive CAD on CCTA, and only 1 with normal/nonobstructive CAD on CCTA was referred for subsequent ICA against protocol (99% fidelity). Overall, 119 of 156 CCTA-first patients did not have ICA within the following 90 days (i.e., 76% potentially avoided ICA, due to the intervention). Among the 36 who underwent ICA post-CCTA per protocol, 24 had obstructive CAD (66.7% diagnostic yield). If all patients who were referred for and underwent ICA at either centre between July 2016 and February 2020 (n = 694 pre-implementation; n = 333 post-implementation) had had CCTA first, an additional 42 patients per 100 would have had an obstructive CAD finding on their ICA (95% confidence interval = 26-59). ConclusionA centralized triage process, in which elective outpatients referred for ICA are instead referred for CCTA first, appears to be acceptable and effective in diagnosing obstructive CAD and improving efficiencies in our healthcare system.

Frailty in Patients Undergoing Chimeric Antigen Receptor T-Cell (CAR T) Therapy at Princess Margaret Cancer Centre: A Prospective Pilot Study

Introduction Princess Margaret Cancer Centre is 1 of 3 adult centres in Ontario, Canada providing Chimeric Antigen Receptor T-Cell (CAR T) therapy as a standard of care treatment for patients with relapsed and refractory B-cell lymphoma, with the first patient treated in June 2020. There is no upper age limit for treatment referral, and frailty is an important consideration in assessing fitness for treatment. However, there is limited published research in this area. One study found that fit patients had improved response rates, progression-free survival (PFS), and overall survival (OS), than patients who were unfit/frail (Zhang. Leuk Lymph. 2022). This data supports the need for further characterization of frailty in patients undergoing CAR-T. This study aims to determine if frailty assessments pre-CAR T can predict those at higher risk for acute toxicities, PFS, and OS. Additionally, changes in frailty in the 12 months following treatment compared to baseline will be described. Understanding how CAR T therapy affects a patient's frailty over time will facilitate planning appropriate interventions. Methods We performed a cohort study of consecutive patients with lymphoma undergoing CAR T-cell therapy at our institution, from April 2021 to present. Information regarding clinical presentation, histological subtype, prognostic factors, bridging treatment, and acute toxicity, such immune effector cell-associated neurotoxicity syndrome (ICANS) and CRS, were collected. Frailty was evaluated using the Clinical Frailty Scale (CFS), Grip Strength, Gait Speed, Mini-Cog, Edmonton Symptom Assessment System (ESAS) and Patient Health Questionnaire (PHQ-2 and PHQ-9) at 5 time points: baseline (clearance visit), and 1, 3, 6 and 12 months post-CAR T. We discontinued assessments upon progression. At baseline, additional assessments were completed to further characterize frailty including the Vulnerable Elders Survey (VES-13), Hematopoietic Cell Transplantation-specific Comorbidity Index (HCT-CI) and Cumulative Illness Rating Scale (CIRS). Results Thirty patients have been enrolled to date. Mean age was 59 ± 13.5 years and patients were primarily male (58.6%). All 30 patients were diagnosed with non-Hodgkin lymphoma; 46.4% had de novo diffuse large B-cell lymphoma, and 21% had transformation from follicular lymphoma. Median follow-up is 2.9 months (Q1 1.2, Q3 9.4). All 30 patients completed assessments at baseline, 21 completed 1 month, 11 completed 3 month, 5 completed 6 month, and 4 completed 12 month assessments. Median scores on the HCT-CI, CIRS and VES-13 at baseline were 1.0 (Q1 0.0, Q3 3.0), 2.0 (Q1 1.0, Q3 6.0) and 1.0 (Q1 0.0, Q3 5.0), respectively. There were clinically significant changes observed in CFS over time (p=0.043), with mean scores of 3.60 (0.25) at baseline and 2.00 (0.67) at 12 months (Table 1). There were no significant changes (p=0.969; p=0.582) between timepoints for either of the physical assessments of grip strength or gait speed. Compared to other assessments, PHQ total score had a larger difference between timepoints with mean scores of 2.33 (0.93) at baseline and 0.00 (0.00) at 12 months, however, this was not significant (p=0.052), likely related to limited sample size (N=4). When analyzing specific acute toxicities, 7 patients experienced ICANS (Grade 3 7.1%, Grade 2 3.6%, Grade 1 (14.3%)). Twenty-five patients (89.3%) experienced CRS (Grade 2 50.0%, Grade 1 39.3%) during the 30 days following cell re-infusion. There have been 8 progression events (2 patients with progression remain alive), and 7 deaths with 1 occurring without disease progression. There was a 76.9% probability of PFS at 3 months and 64.5% at 6 months, with 3 month and 6 month OS 80.2% and 74.5%. Conclusions The only repeated measurement of frailty that found to have clinically significant changes between timepoints was the CFS, suggesting an element of reversible functional impairment related to patients’ lymphoma. Overall patients appear to be impaired at baseline, worsen through the first 1-3 months, and improve by 12 month if in remission. However, the number of patients who completed the 12 month visit to date is small and more data is needed from ongoing follow-up and accrual. Figure 1View largeDownload PPTFigure 1View largeDownload PPT Close modal

Abstract 12086: Predicting Long-Term Survival After De Novo Cardioverter-Defibrillator Implantation for Primary Prevention

Introduction: Current guidelines recommend the use of implantable cardioverter-defibrillators (ICDs) for primary prevention of arrhythmia in patients with reduced ejection fraction cardiomyopathy. Little is known about the long-term outcomes of patients with ICDs in clinical practice. Objective: To develop a risk prediction model for 10-year survival after ICD implantation for primary prevention. Methods: In this population-based registry of all ICD patients across 18 centers in Ontario, CA, 5097 patients receiving ICD implant for primary prevention from February 2007 to March 2011 were followed for up to 10 years. Patients were randomly split 2:1 into derivation and internal validation cohorts to develop and validate a prognostic model using Cox regression and predictors measured at initial ICD evaluation. Results: Mean age was 65.3 years (SD 11.0), 664 patients were female (19.5%) and 2344 patients (69.0%) had ischemic cardiomyopathy for primary disease indication. 10-year survival was 45.7% (95% CI 44.0%-47.4%).The final prediction model included age, sex, disease indication, comorbidities and biomarkers at the time of ICD assessment ( Table 1 ). This model had good discrimination in derivation (AUC 0.80; 95% CI 0.78-0.81) and validation samples (0.79, 95% CI 0.77-0.81) and good calibration. Sensitivity analyses showed that the addition of device type, provider factors (implantation site, implanter volume, physician main specialty), sex-related interaction terms, and frailty scores did not significantly improve the prediction model. Conclusion: A combination of demographic and patient factors determined at baseline device evaluation enabled the prediction of 10-year survival in patients undergoing ICD for primary prevention in the clinical practice. Our findings may help identify and monitor individuals at risk of long-term mortality and may be useful in targeting future prevention strategies to enhance longevity in this high-risk population.

Personalised cooler dialysate for patients receiving maintenance haemodialysis (MyTEMP): a pragmatic, cluster-randomised trial

Haemodialysis centres have conventionally provided maintenance haemodialysis using a standard dialysate temperature (eg, 36·5°C) for all patients. Many centres now use cooler dialysate (eg, 36·0°C or lower) for potential cardiovascular benefits. We aimed to assess whether personalised cooler dialysate, implemented as centre-wide policy, reduced the risk of cardiovascular-related death or hospital admission compared with standard temperature dialysate. MyTEMP was a pragmatic, two-arm, parallel-group, registry-based, open-label, cluster-randomised, superiority trial done at haemodialysis centres in Ontario, Canada. Eligible centres provided maintenance haemodialysis to at least 15 patients a week, and the medical director of each centre had to confirm that their centre would deliver the assigned intervention. Using covariate-constrained randomisation, we allocated 84 centres (1:1) to use either personalised cooler dialysate (nurses set the dialysate temperature 0·5-0·9°C below each patient's measured pre-dialysis body temperature, with a lowest recommended dialysate temperature of 35·5°C), or standard temperature dialysate (36·5°C for all patients and treatments). Patients and health-care providers were not masked to the group assignment; however, the primary outcome was recorded in provincial databases by medical coders who were unaware of the trial or the centres' group assignment. The primary composite outcome was cardiovascular-related death or hospital admission with myocardial infarction, ischaemic stroke, or congestive heart failure during the 4-year trial period. Analysis was by intention to treat. The study is registered at ClinicalTrials.gov, NCT02628366. We assessed all of Ontario's 97 centres for inclusion into the study. Nine centres had less than 15 patients and one director requested that four of their seven centres not participate. 84 centres were recruited and on Feb 1, 2017, these centres were randomly assigned to administer personalised cooler dialysate (42 centres) or standard temperature dialysate (42 centres). The intervention period was from April 3, 2017, to March 31, 2021, and during this time the trial centres provided outpatient maintenance haemodialysis to 15 413 patients (about 4·3 million haemodialysis treatments). The mean dialysate temperature was 35·8°C in the cooler dialysate group and 36·4°C in the standard temperature group. The primary outcome occurred in 1711 (21·4%) of 8000 patients in the cooler dialysate group versus 1658 (22·4%) of 7413 patients in the standard temperature group (adjusted hazard ratio 1·00, 96% CI 0·89 to 1·11; p=0·93). The mean drop in intradialytic systolic blood pressure was 26·6 mm Hg in the cooler dialysate group and 27·1 mm Hg in the standard temperature group (mean difference -0·5 mm Hg, 99% CI -1·4 to 0·4; p=0·14). Centre-wide delivery of personalised cooler dialysate did not significantly reduce the risk of major cardiovascular events compared with standard temperature dialysate. The rising popularity of cooler dialysate is called into question by this study, and the risks and benefits of cooler dialysate in some patient populations should be clarified in future trials. Canadian Institutes of Health Research, Heart and Stroke Foundation of Canada, Ontario Renal Network, Ontario Strategy for Patient-Oriented Research Support Unit, Dialysis Clinic, Inc., ICES (formerly known as the Institute for Clinical Evaluative Sciences), Lawson Health Research Institute, and Western University.

Role of a skin bridge incision and prophylactic incisional negative-pressure wound therapy in the prevention of surgical site infection after inguinal lymph node dissection.

Background:Modification of the surgical technique to a 2-incision technique with skin bridge from the traditional lazy S (LS) incision, as well as use of prophylactic incisional negative-pressure wound therapy (iNPWT), are theorized to reduce the risk of surgical site infection (SSI) after inguinal lymph node dissection (ILND). We sought to investigate the role of a perioperative ILND bundle on adverse events after ILND and lymph node harvest.Methods:We performed a retrospective review of patients who underwent ILND before and after implementation of the ILND bundle (September 2016) at 1 centre in southeastern Ontario between 2013 and 2018. The ILND bundle included a skin bridge incision, running subcuticular skin closure and NPWT. Previously, an LS incision was used, with stapled skin closure and conventional dressing. Development of SSI was the primary outcome, and dehiscence and seroma and hematoma formation were secondary outcomes. We estimated the associations using multivariable logistic regression.Results:Thirty-four ILNDs in 33 patients were included, 15 in the LS incision group and 19 in the perioperative bundle group. The baseline demographic characteristics of the 2 groups were similar. The perioperative bundle was associated with a reduction in the SSI rate (11 [73%] v. 6 [32%], p = 0.02) and elimination of wound dehiscence (0 [0%] v. 5 [33%], p = 0.006). On multivariable logistic regression, it was associated with a 5.9-fold reduction in the SSI rate (odds ratio 0.17, 95% confidence interval 0.03–0.74).Conclusion:The results suggest a decrease in SSI rates with use of a perioperative bundle compared to the LS incision and a standard dressing. Randomized controlled trials are required to better understand the associations among the skin bridge incision, iNPWT and SSI.

Continuity of care for older adults in a Canadian long-term care setting: a qualitative study.

BackgroundContinuity of care has been shown to improve health outcomes and increase patient satisfaction. Goal-oriented care, a person-centered approach to care, has the potential to positively impact continuity of care. This study sought to examine how a goal-oriented approach impacts continuity of care in a long-term care setting.MethodsUsing a case study approach, we examined what aspects of goal-oriented care facilitate or inhibit continuity of care from the perspectives of administrators, care providers, and residents in a long-term care centre in Ontario, Canada. Data was collected through documentary evidence and semi-structured interviews.ResultsWe analyzed six internal documents (e.g., strategic plan, client information package, staff presentations, evaluation framework, program logic model), and conducted 13 interviews. The findings indicated that the care provided through the goal-oriented approach program had elements that both facilitated and inhibited continuity of care. These factors are outlined according to the three types of continuity, including aspects of the program that influence informational, relational, and management continuity.ConclusionsAspects of the goal-oriented care approach that facilitate continuity can be targeted when designing person-centered care approaches. More research is needed on goal-oriented care approaches that have been implemented in other long-term care settings to determine if the factors identified here as influencing continuity are confirmed.Supplementary InformationThe online version contains supplementary material available at 10.1186/s12913-022-08583-1.

Does the definition of preventable emergency department visit matter? An empirical analysis using 20 million visits in Ontario and Alberta.

This study had two objectives: (1) to estimate the prevalence of preventable emergency department (ED) visits during the 2016-2020 time period among those living in 19 large urban centers in Alberta and Ontario, Canada, and (2) to assess if the definition of preventable ED visits matters in estimating the prevalence. A retrospective, population-based study of ED visits that were reported to the National Ambulatory Care Reporting System from April 1, 2016, to March 31, 2020, was conducted. Preventable ED visits were operationalized based on the following approaches: (1) Canadian Triage and Acuity Scale (CTAS), (2) ambulatory care-sensitive conditions (ACSC), (3) family practice-sensitive conditions (FPSC), and (4) sentinel nonurgent conditions (SNC). The overall proportion of ED visits that were preventable was estimated. We also estimated the adjusted relative risks of preventable ED visits by patients' sex and age, fiscal year, province of residence, and census metropolitan area (CMA) of residence. There were 20,171,319 ED visits made by 8,919,618 patients ages 1 to 74 who resided in one of the 19 CMAs in Alberta or Ontario. On average, there were 2.26 visits per patient over the period of 4 fiscal years; most patients made one (44.22%) or two ED visits (20.72%). The overall unadjusted prevalence of preventable ED visits varied by definition; 35.33% of ED visits were defined as preventable based on CTAS, 12.88% based on FPSC, 3.41% based on SNC, and 2.33% based on ACSC. There is a substantial level of variation in prevalence estimates across definitions of preventable ED visits, and care should be taken when interpreting these estimates as each has a different meaning and may lead to different conclusions. The conceptualization and measurement of preventable ED visits is complex and multifaceted and may not be adequately captured by a single definition.

Impact of the COVID-19 pandemic on non-small-cell lung cancer pathologic stage and presentation.

Background:It is believed that the cessation of normative cancer care services during the COVID-19 pandemic may be resulting in pathologic upstaging and higher long-term mortality rates. We aimed to understand how the pandemic has affected our patients diagnosed with non–small-cell lung cancer (NSCLC).Methods:We conducted a single-centre retrospective analysis to assess how the COVID-19 pandemic has affected patient referrals, pathologic stage of NSCLC, mortality rates and surgical procedures at our cancer care centre in Ontario, Canada. At our centre, physicians advocated for and followed recommendations that operations in cancer patients should be among the last procedures to be delayed. Patients were included if they were aged 18 years or older, were not receiving palliative care, and had been screened, diagnosed and treated for NSCLC (primary tumours). We compared outcomes between a prepandemic period (January 2019 to February 2020) and a period during the pandemic (March 2020 to February 2021).Results:A total of 695 patients were included for statistical analysis, of whom 650 underwent surgery. There was no statistically significant difference in any of the outcomes of interest between patients seen before (n = 330) and during (n = 320) the pandemic.Conclusion:Cancer care services at our centre were maintained during the COVID-19 pandemic, and potential adverse effects on prognosis and survival that have been seen in other countries were avoided. The results inform health care providers how the effects of future pandemics can be blunted by using proactive preservative strategies and surgeon advocacy.

Are mismatch repair deficient endometrial cancer recurrences more salvageable than intact cohort? (272)

Are mismatch repair deficient endometrial cancer recurrences more salvageable than intact cohort? (272)

Molecular classification of endometrial cancers using an integrative DNA sequencing panel (271)

<b>Objectives:</b> The Cancer Genome Atlas (TCGA) has identified four molecular subgroups of endometrial cancers (EC) with distinct differences in prognosis and response to adjuvant treatment. Stratification of patients according to molecular profiles is critical for individualized therapy at diagnosis, but adoption of molecular classification into clinical practice remains challenging due to the complexity and costs associated with sequencing. We aimed to develop a simple and affordable molecular technique to classify EC into four TCGA subgroups using our high-depth targeted sequencing panel. <b>Methods:</b> Women with newly diagnosed EC were prospectively recruited from three cancer centers in Ontario, Canada, between 2015 and 2018. Tumors were reflexively assessed for mismatch repair (MMR) protein expression by immunohistochemistry (IHC). Using our custom-designed panel, 181 formalin-fixed paraffin-embedded (FFPE) EC samples were sequenced. Our panel was able to identify somatic mutations, copy number variants, insertions and deletions, copy neutral loss of heterozygosity, structural rearrangements, and promoter methylation from a single aliquot of DNA. Variants were analyzed for pathogenicity, and clinical-pathologic information was collected through medical records. <b>Results:</b> Of 181, 86 (48%) were classified into microsatellite instability-high/hypermutated cohort (MSI-h or MMRd), of which 62 (72%) harbored <i>MLH1</i> promoter methylation, and 24 (27%) had pathogenic variants in MMR genes. Concordance with clinical IHC and methylation testing results was high at 99%. Of cases with a single classifier, three (1.6%; <i>n</i>=181) had pathogenic <i>POLE</i> exonuclease domain mutation (<i>POLE</i>mut), 15 (8%) had a pathogenic p53 variant (p53mut), and 61 (34%) had no specific molecular profile subtype (NSMP). Sixteen (9%; <i>n</i>=181) had more than one molecular classifying feature, with eight (4%) having MMRd-p53mut, six (3%) with MMRd-<i>POLE</i>mut, one (0.5%) with MMRd-<i>POLE</i>mut-p53mut, and one (0.5%) with <i>POLE</i>mut-p53mut. Overall, there were 11 (6%) with <i>POLE</i> mutations (three single and nine multiple classifiers). Survival outcomes of MMRd, <i>POLEmut,</i> p53mut, and NSMP groups stratified similarly to TCGA data, but when the MMRd group was further subclassified according to the mechanism of MMR loss, the MLH1 promoter methylated group did worse than those with somatic MMR pathogenic variants (5-year OS: 0.72 [0.57-0.92] vs 1.00 [1.00-1.00]; p=0.013 and RFS: 0.70 [0.58-0.85] vs 0.92 [0.82-1.00]; p=0.032). In contrast, those with somatic MMR pathogenic variants had similar outcomes to the <i>POLE</i>mut subtype (p=0.396) (Figure 1). <b>Conclusions:</b> Our NGS panel can classify EC into four TCGA subgroups through a simplified process and can be implemented reflexively in clinical practice. The higher rate of multiple classifiers (9%) in this study warrants further investigation. The difference in survival between MLH1 methylated group within MMRd cohort suggests that further subclassification may be required for accurate prognostication.

Salvage partial gland ablation for recurrent prostate cancer following primary partial gland ablation: Functional and oncological outcomes.

Partial gland ablation (PGA) for localised prostate cancer (CaP) aims to eradicate clinically significant tumours while preserving healthy tissue, thereby decreasing the likelihood of side effects compared to whole-gland approaches. Although salvage radical prostatectomy (sRP) is a well-described salvage option in cases of PGA failure, the evidence supporting salvage PGA (sPGA) is limited. We hereby report the oncologic and functional outcomes of patients treated with sPGA following initial treatment with primary PGA (pPGA). We describe the findings of a retrospective review of patients who had a CaP recurrence after pPGA and then underwent sPGA, at 3 medical centers in Ontario, Canada, between 2005 and 2017. Oncological outcomes following sPGA were assessed for biochemical recurrence (BCR) and biopsy-proven recurrence (BPR). Functional outcomes were described using the international prostate symptom score (IPSS), international index of erectile function (IIEF), and rates of urinary incontinence (use of >1 pad/day). We identified 25 patients who underwent sPGA following pPGA (hemiablation in 48% and zonal ablation in 52% of the patients). The median length of time was 16.8 months (interquartile range [IQR] 14.0-19.1) from pPGA to sPGA and 47.06 months (IQR 19.9-171.3) from pPGA to date of last follow up. High intensity focused ultrasound (HIFU) was the only modality used in all patients. At baseline, the median age was 65 years (IQR 52-77) and median prostate specific antigen (PSA) level was 7.46 ng/mL (IQR 1-25). The median time from pPGA to BPR was 12.7 months (IQR 5.19-36). At BPR following pPGA, 4 patients (17%) had CaP grade group (GG) 1, 10 patients (42%) had GG2, 6 patients (25%) had GG3, and 4 patients (17%) had GG4 disease, with a median PSA of 3.58 ng/mL (IQR 0.67-19). The median length of follow up after sPGA was 27.3 months (IQR 14.5-86.3). Following sPGA, 13/25 patients (52%) had BCR with median time to recurrence of 14 months (IQR 2.5-82.15), with a recurrence-free survival of 24.5 months (95% confidence interval: 15.3-not reached). Of those 13 patients, 4 were managed with sRP, 4 were managed with salvage radiotherapy, 3 were managed with androgen-deprivation therapy, 1 had a third PGA with HIFU, and 1 was managed with active surveillance. The mean change from baseline to last follow up in IPSS and IIEF scores was +1.3 (P = 0.66) and -2.3 (P = 0.32), respectively. Urinary incontinence was reported by 9% of patients at baseline, with only one additional patient developing incontinence following sPGA. Our present study demonstrates that after a median follow-up of 27 months, sPGA for recurrent CaP following pPGA provides disease control in up to 50% of patients with nonsignificant detrimental effects on functional outcomes. Appropriate patient selection and adequate staging are important to consider before offering PGA to patients.

Youth Wellness Hubs Ontario: Development and initial implementation of integrated youth services in Ontario, Canada.

The need for youth-friendly early intervention services to meet the mental health, substance use, primary care, and other social needs of adolescents and young adults is well-documented. This article describes Youth Wellness Hubs Ontario, a province-wide initiative in Ontario, Canada to build and implement a one-stop-shop model of integrated youth services. We describe the development of Youth Wellness Hubs Ontario, in the context of global youth mental health system transformation, as well as pan-Canadian youth mental health system change. We also describe Youth Wellness Hubs Ontario's values and services. The demonstration phase of Youth Wellness Hubs Ontario was initiated in 2017-2018. Youth Wellness Hubs Ontario is co-created with youth for youth aged 12-25 years old across diverse community contexts. Youth Wellness Hubs Ontario centres engagement and equity, and offers developmentally-appropriate services in an integrated, community-based walk-in format. As an initiative committed to continuous learning and quality improvement, Youth Wellness Hubs Ontario offers evidence-based and evidence-generating services, and measurement-based care. Youth Wellness Hubs Ontario is supported by backbone resources with expertise in implementation science, health equity, Indigenous practices, youth and family engagement, evaluation, and knowledge translation. In 2020 Youth Wellness Hubs Ontario secured sustainable funding for the first 10 locations and scale-up began in 2021, with 10 additional locations in development. Youth Wellness Hubs Ontario demonstrates the feasibility of integrated mental health and substance use early intervention services, offered in the context of a broad range of health and social services.

Using deep-learning in fetal ultrasound analysis for diagnosis of cystic hygroma in the first trimester.

To develop and internally validate a deep-learning algorithm from fetal ultrasound images for the diagnosis of cystic hygromas in the first trimester. All first trimester ultrasound scans with a diagnosis of a cystic hygroma between 11 and 14 weeks gestation at our tertiary care centre in Ontario, Canada were studied. Ultrasound scans with normal nuchal translucency were used as controls. The dataset was partitioned with 75% of images used for model training and 25% used for model validation. Images were analyzed using a DenseNet model and the accuracy of the trained model to correctly identify cases of cystic hygroma was assessed by calculating sensitivity, specificity, and the area under the receiver-operating characteristic (ROC) curve. Gradient class activation heat maps (Grad-CAM) were generated to assess model interpretability. The dataset included 289 sagittal fetal ultrasound images;129 cystic hygroma cases and 160 normal NT controls. Overall model accuracy was 93% (95% CI: 88-98%), sensitivity 92% (95% CI: 79-100%), specificity 94% (95% CI: 91-96%), and the area under the ROC curve 0.94 (95% CI: 0.89-1.0). Grad-CAM heat maps demonstrated that the model predictions were driven primarily by the fetal posterior cervical area. Our findings demonstrate that deep-learning algorithms can achieve high accuracy in diagnostic interpretation of cystic hygroma in the first trimester, validated against expert clinical assessment.

Challenges in virtual collection of patient-reported data: a prospective cohort study conducted in COVID-19 era.

Prior to the COVID-19 pandemic, patients attending ambulatory clinics at cancer centers in Ontario completed the Edmonton Symptom Assessment Scale (ESAS) at each visit. At our center, completion was via touchpad, with assistance from clinic volunteers. As of March 2020, clinic appointments were conducted virtually when possible and touch pads removed. We anticipated a negative impact on the collection of patient-reported outcomes (PROs) and the recognition of severe symptoms.MethodsWe performed a prospective cross-sectional cohort study to investigate remote ESAS completion by patients with appointments at a weekly surgical oncology clinic. Patients in the initial study cohort were asked to complete and return the ESAS virtually (V). Given low completion rates, the ensuing cohort was asked to complete a hard-copy (HC) ESAS. For the final cohort, we provided remote, personal mentorship by a member of the care team to support virtual electronic ESAS completion (virtual-mentored (VM) cohort).ResultsBetween May and July 2020, a total of 174 patient encounters were included in the study. For the V cohort, 20/46 patients (44%) successfully completed and returned the electronic ESAS, compared to 49/50 (98%) for the HC cohort. For the VM cohort, the overall completion rate was 74% (58/78); however, 12 of these 58 patients did not independently complete a virtual ESAS. Virtual questionnaire completion was not predicted by age, sex, or tumor site, although patients who completed the ESAS were more likely to be in active management rather than surveillance (p = 0.04). Of all completed forms, 42% revealed a depression score of ≥2, and 27% an anxiety score of ≥4.ConclusionsWe identified significant barriers to the virtual completion of ESAS forms, with a lack of predictive variables. The severe degree of psychological distress reported by ~50% of respondents demonstrates the need for ongoing regular collection/review of these data. Innovative solutions are required to overcome barriers to the virtual collection of PROs.Supplementary InformationThe online version contains supplementary material available at 10.1007/s00520-022-07191-3.

Relative Efficiency of Radiation Treatment Centers: An Application of Data Envelopment Analysis.

This study determines the relative efficiencies of a number of cancer treatment centers in Ontario, taking into account the differences among them so that their performances can be compared against the provincial targets. These differences can be in physical and financial resources, and patient demographics. An analytical framework is developed based on a three-step data envelopment analysis (DEA) model to build efficiency metrics for planning, delivery, and quality of treatment at each center. Regression analysis is used to explain the efficiency metrics and demonstrates how these findings can inform continuous improvement efforts.