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Dive into the research topics where Melanie Powis is active.

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Featured researches published by Melanie Powis.


Journal of Oncology Practice | 2015

Extending the Quality and Safety Agenda From Parenteral to Oral Chemotherapy

Monika K. Krzyzanowska; Melanie Powis

This article describes some of the steps that can be taken across the entire oral chemotherapy journey to improve quality and safety by leveraging existing and emerging tools.


Cancer | 2017

Establishing achievable benchmarks for quality improvement in systemic therapy for early-stage breast cancer

Melanie Powis; Rinku Sutradhar; Alejandro Gonzalez; Katherine Enright; Nathan Taback; Christopher M. Booth; Maureen E. Trudeau; Monika K. Krzyzanowska

Setting realistic targets for performance is a consistent challenge in quality improvement. In the current study, the authors used administrative data to define achievable targets for a panel of 15 previously developed quality indicators (QIs) focusing on systemic therapy in patients with early‐stage breast cancer.


Journal of Clinical Oncology | 2016

Setting Quality Improvement Priorities for Women Receiving Systemic Therapy for Early-Stage Breast Cancer by Using Population-Level Administrative Data

Katherine Enright; Nathan Taback; Melanie Powis; Alejandro Gonzalez; Lingsong Yun; Rinku Sutradhar; Maureen E. Trudeau; Christopher M. Booth; Monika K. Krzyzanowska

Purpose Routine evaluation of quality measures (QMs) can drive improvement in cancer systems by highlighting gaps in care. Targeting quality improvement at QMs that demonstrate substantial variation has the potential to make the largest impact at the population level. We developed an approach that uses both variation in performance and number of patients affected by the QM to set priorities for improving the quality of systemic therapy for women with early-stage breast cancer (EBC). Patients and Methods Patients with EBC diagnosed from 2006 to 2010 in Ontario, Canada, were identified in the Ontario Cancer Registry and linked deterministically to multiple health care databases. Individual QMs within a panel of 15 QMs previously developed to assess the quality of systemic therapy across four domains (access, treatment delivery, toxicity, and safety) were ranked on interinstitutional variation in performance (using interquartile range) and the number of patients who were affected; then the two rankings were averaged for a summative priority ranking. Results We identified 28,427 patients with EBC who were treated at 84 institutions. The use of computerized physician electronic order entry for chemotherapy, emergency room visits or hospitalizations during chemotherapy, and timely receipt of chemotherapy were identified as the QMs that had the largest potential to improve quality of care at a system level within this cohort. Conclusion A simple ranking system based on interinstitutional variation in performance and patient volume can be used to identify high-priority areas for quality improvement from a population perspective. This approach is generalizable to other health care systems that use QMs to drive improvement.


Archive | 2018

How to Undertake Outcomes Research in Oncology

Monika K. Krzyzanowska; Melanie Powis

Outcomes research is a commonly used term to describe research that focuses on evaluating the quality and effectiveness of care delivery in the routine care setting. However, there is no universally accepted definition or consensus on what this area of inquiry entails. The terms “outcomes research”, “health services research”, and “comparative effectiveness research” are often used interchangeably; however, each seeks to address slightly different research questions. Herein, we examine the evolution of outcomes research, from measuring and reporting on aspects of cancer care delivered using retrospective chart review and administrative data to driving quality improvement via measuring quality, defining performance targets, and evaluating alternative treatments in routine practice through to observational and prospective, pragmatic evaluations of interventions and new models of care.


Journal of Oncology Practice | 2018

Can Chemotherapy-Related Acute Care Visits Be Accurately Identified in Administrative Data?

Monika K. Krzyzanowska; Katherine Enright; Rahim Moineddin; Lingsong Yun; Melanie Powis; Mohammed Ghannam; Eva Grunfeld

PURPOSE There is increasing interest in using administrative data to examine treatment-related complications that lead to emergency department (ED) visits or hospitalizations (H). The purpose of this study was to evaluate the reliability of billing codes for identifying chemotherapy-related acute care visits (CRVs) among women with early-stage breast cancer. MATERIALS AND METHODS The cohort was identified by using deterministically linked health databases and consisted of women who were diagnosed with early-stage breast cancer who started adjuvant chemotherapy between 2007 and 2009 in Ontario, Canada. A random sample of 496 patient cases was chosen as the validation cohort. Sensitivity (SN) and specificity (SP) were calculated for three scenarios: chemotherapy-related ED visit, chemotherapy-related H, and febrile neutropenia (FN)-related visit. For FN-related visits, three definitions were considered: general, moderate, and strict. RESULTS The administrative cohort consisted of 8,359 patients, 43.4% of whom had at least one ED or H, including 1,496 women who had multiple visits that resulted in 6,293 unique visits. Of these, 73.1% were considered CRVs. The algorithm performed well in identifying CRVs that included H either from ED (SN, 90%; SP, 100%) or directly from home (SN, 91%; SP, 93%), but less well for ED visits that did not result in H (SN, 65%; SP, 80%). Depending on which FN algorithm was used, 4.8% to 24% of visits were considered related. The moderate FN algorithm provided the best tradeoff between SN (69% to 97%) and SP (83% to 98%). CONCLUSION Administrative data can be valuable in evaluating chemotherapy-related serious events. Algorithm validation in other cohorts is needed.


European Journal of Cancer Care | 2018

Hospitalisations and emergency department visits in cancer patients receiving systemic therapy: Systematic review and meta-analysis

Rebecca M. Prince; Melanie Powis; Alona Zer; Eshetu G. Atenafu; Monika K. Krzyzanowska

Emergency department visits and hospitalisations (ED+H) during systemic therapy are undesirable for both patients and the health system. We undertook a systematic literature review and meta-analysis to evaluate the frequency of unplanned all-cause and treatment-related ED+H among adults receiving adjuvant or palliative-intent systemic therapy for all cancers. Randomised controlled trials (RCT) and observational studies (OS) reporting ED+H were identified from Medline and EMBASE from inception to June 2016. Quality was assessed using modified STROBE, CONSORT or PRISMA guidelines, depending on study type. A total of 112 OS (308,662 patients) and 26 RCTs (16,081 patients) met inclusion criteria. Most articles focused on palliative treatment (59%) delivered as first-line, in breast, lung and colorectal cancers. Only 20 articles reported ED frequency. Treatment-related and all-cause hospitalisations were more common in routine practice than in RCTs (29% vs. 16% and 42% vs. 28% respectively); frequency varied by treatment intent and tumour site. Methodological issues were common, particularly poor definition of the at-risk period. Hospitalisations are common, especially in unselected populations, but few articles report this and do so poorly. Routine, standardised reporting of ED+H during chemotherapy should be included in RCT reports and evaluated in routine care following adoption of new treatments.


Current Oncology | 2018

Factors associated with imaging in patients with early breast cancer after initial treatment

Katherine Enright; Tejas Desai; Rinku Sutradhar; A. Gonzalez; Melanie Powis; Nathan Taback; Christopher M. Booth; Maureen E. Trudeau; Monika K. Krzyzanowska

Background Overuse of surveillance imaging in patients after curative treatment for early breast cancer (ebc) was recently identified as one of the Choosing Wisely Canada initiatives to improve the quality of cancer care. We undertook a population-level examination of imaging practices in Ontario as they existed before the launch of that initiative. Methods Patients diagnosed with ebc between 2006 and 2010 in Ontario were identified from the Ontario Cancer Registry. Records were linked deterministically to provincial health care databases to obtain comprehensive follow-up. We identified all advanced imaging exams [aies: computed tomography (ct), bone scan, positron-emission tomography] and basic imaging exams (bies: ultrasonography, chest radiography) occurring within the first 2 years after curative treatment. Poisson regression was used to assess associations between patient or provider characteristics and the rate of aies. Results Of 30,006 women with ebc, 58.6% received at least 1 bie, and 30.6% received at least 1 aie in year 1 after treatment. In year 2, 52.7% received at least 1 bie, and 25.7% received at least 1 aie. The most common aies were chest cts and bone scans. The rate of aies increased with older age, higher disease stage, comorbidity, chemotherapy exposure, and prior staging investigations (p < 0.001). Imaging was ordered mainly by medical oncologists (38%), followed by primary care physicians (23%), surgeons (13%), and emergency room physicians (7%). Conclusions Despite recommendations against its use, imaging is common in ebc survivors. Understanding the factors associated with aie use helps to identify areas for further research and is required to lower imaging rates and to improve survivorship care.


Journal of Clinical Oncology | 2016

Establishing achievable benchmarks for quality improvement in systemic therapy for early-stage breast cancer.

Melanie Powis; Alejandro Gonzalez; Rinku Sutradhar; Katherine Enright; Nathan Taback; Christopher M. Booth; Maureen E. Trudeau; Monika K. Krzyzanowska

263 Background: Setting realistic targets for performance on quality indicators (QI) is a consistent challenge in quality improvement. The purpose of this study was to utilize administrative data to define achievable targets for QI in the early stage breast cancer (EBC) population in relation to systemic therapy (ST) delivery based on best performers. METHODS Deterministically linked administrative healthcare databases were used to identify EBC cases diagnosed 2006 - 2010 in Ontario, Canada. Panel of previously established QIs for systemic therapy was applied to patients who met eligibility criteria for the individual indicators. Institutions with less than 10 eligible patients for a specific indicator were excluded. An empiric benchmark was defined as the proportion of patients meeting the indicator from institutions accounting for the top decile of eligible patients. RESULTS We identified 28,303 EBC patients who received surgery of which 12,252 received adjuvant chemotherapy. Benchmark results are summarized in Table. CONCLUSIONS Many institutions fell considerably below the benchmark. Further analysis of institution-level drivers of high quality care is required to help characterize high performing institutions. [Table: see text].


Journal of Clinical Oncology | 2016

Defining user needs for an electronic tool to improve chemotherapy-related toxicity management.

Rebecca M. Prince; Laura Parente; Anthony Soung Yee; Melanie Powis; Katherine Enright; Sonal Gandhi; Eva Grunfeld; Rashida Haq; Amna Husain; Monika K. Krzyzanowska


Journal of Clinical Oncology | 2018

Does the risk of emergency department visits and hospitalizations during systemic therapy for cancer influence patient decisions regarding treatment

Monika K. Krzyzanowska; Cameron Phillips; Ken Deal; Melanie Powis; Simron Singh; Laavanya Dharmakulaseelan; Harsh Naik; Aditi Dobriyal; Nasrin Alavi

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Monika K. Krzyzanowska

Princess Margaret Cancer Centre

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Maureen E. Trudeau

Sunnybrook Health Sciences Centre

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Lingsong Yun

Toronto Western Hospital

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