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Niu J, Brown C, Law M, Colacino JA, Ritov Y. Longitudinal Position and Cancer Risk in the United States Revisited. Cancer Res Commun 2024; 4:328-336. [PMID: 38284880 PMCID: PMC10848893 DOI: 10.1158/2767-9764.crc-23-0503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 01/12/2024] [Accepted: 01/17/2024] [Indexed: 01/30/2024]
Abstract
The debate over daylight saving time (DST) has surged, with interests in the effects of sunlight exposure on health. Prior studies simulated DST and standard time conditions by analyzing different locations within time zones and neighboring areas across time zone borders. We analyzed cancer incidence rates from various longitudinal positions within time zones and at time zone borders in the contiguous United States. Using data from State Cancer Profiles (2016-2020), we analyzed total cancer of 19 types and specific rates for eight cancers, adjusted for age and includes all demographics. log-linear regression is used to replicate a previous study, and spatial regression models are employed to explore discontinuities at borders. Cancer rate differences lack statistical significance within time zones and near borders for total cancer and most individual cancers. Exceptions included breast, prostate, and liver and bile duct cancers, which exhibited significant relationships with relative position at the 95% significance level. Breast and liver and bile duct cancers saw decreases, while prostate cancer incidence increased from west to east within time zones. Relative position does not have a significant impact on cancer incidence, hence cancer development in general. Isolated exceptions may warrant further investigation as more data become available. Our findings challenge prior research, revealing numerous inconsistencies. These disparities urge a reconsideration of the potential disparities in human health associated with DST and standard time. They offer insights contribute to the ongoing discussion surrounding the retention or abandonment of DST. SIGNIFICANCE In this article, we investigate the relation between the epidemiology of cancer incidence in the United States and time zone-related longitudinal positions. Our results differ from previous research, which were based on a subset of our data, and show that the time zone effect on cancer incidence rate is not significant. Our research provides implications on the implementation of DST by suggesting that there is no cancer-risk associated reason to prefer one time over the other. Our study also uses regression discontinuity design using natural splines, a more advanced statistical method, to increase robustness of our result. Our findings challenge prior research, revealing numerous inconsistencies. These disparities urge a reconsideration of the potential disparities in human health associated with DST and standard time. They offer insights contribute to the ongoing discussion surrounding the retention or abandonment of DST.
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Affiliation(s)
- Jin Niu
- Department of Economics, Brown University, Providence, Rhode Island
| | - Charlotte Brown
- Department of Statistics, University of Michigan, Ann Arbor, Michigan
| | - Michael Law
- Seminar für Statistik, ETH Zürich, Zürich, Switzerland
| | | | - Ya'acov Ritov
- Department of Statistics, University of Michigan, Ann Arbor, Michigan
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Zeitouny S, McGrail K, Tadrous M, Wong ST, Cheng L, Law M. Impact of the COVID-19 pandemic on prescription drug use and costs in British Columbia: a retrospective interrupted time series study. BMJ Open 2024; 14:e070031. [PMID: 38176877 PMCID: PMC10773331 DOI: 10.1136/bmjopen-2022-070031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Accepted: 12/06/2023] [Indexed: 01/06/2024] Open
Abstract
OBJECTIVES To assess the impact of the COVID-19 pandemic on prescription drug use and costs. DESIGN Interrupted time series analysis of comprehensive administrative health data linkages in British Columbia, Canada, from 1 January 2018 to 28 March 2021. SETTING Retrospective population-based analysis of all prescription drugs dispensed in community pharmacies and outpatient hospital pharmacies and irrespective of the drug insurance payer. PARTICIPANTS Between 4.30 and 4.37 million individuals (52% women) actively registered with the publicly funded medical services plan. INTERVENTION COVID-19 pandemic and associated mitigation measures. MAIN OUTCOME MEASURES Weekly dispensing rates and costs, both overall and stratified by therapeutic groups and pharmacological subgroups, before and after the declaration of the public health emergency related to the COVID-19 pandemic. Relative changes in post-COVID-19 outcomes were expressed as ratios of observed to expected rates. RESULTS After the onset of the pandemic and subsequent COVID-19 mitigation measures, overall medication dispensing rates dropped by 2.4% (p<0.01), followed by a sustained weekly increase to return to predicted levels by the end of January 2021. We observed abrupt level decreases in antibacterials (30.3%, p<0.01) and antivirals (22.4%, p<0.01) that remained below counterfactuals over the first year of the pandemic. In contrast, there was a week-to-week trend increase in nervous system drugs, yielding an overall increase of 7.3% (p<0.01). No trend changes in the dispensing of respiratory system agents, ACE inhibitors, antidiabetic drugs and antidepressants were detected. CONCLUSION The COVID-19 pandemic impact on prescription drug dispensing was heterogeneous across medication subgroups. As data become available, dispensing trends in nervous system agents, antibiotics and antivirals warrant further monitoring and investigation.
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Affiliation(s)
- Seraphine Zeitouny
- Centre for Health Services and Policy Research, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Kimberlyn McGrail
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mina Tadrous
- University of Toronto, Toronto, Ontario, Canada
- Women's College Hospital, Toronto, Ontario, Canada
| | - Sabrina T Wong
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Lucy Cheng
- Centre for Health Services and Policy Research, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
| | - Michael Law
- Centre for Health Services and Policy Research, School of Population and Public Health, The University of British Columbia, Vancouver, British Columbia, Canada
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Spence J, Belley-Côté E, Jacobsohn E, Lee SF, D’Aragon F, Avidan M, Mazer CD, Rousseau-Saine N, Rajamohan R, Pryor K, Klein R, Tan E(CH, Cameron M, Di Sante E, DeBorba E, Mustard M, Couture E, Zamper R, Law M, Djaiani G, Saha T, Choi S, Hedlin P, Pikaluk R, Lam WY, Deschamps A, Whitlock R, Dulong B, Devereaux P, Beaver C, Kloppenburg S, Oczkowski S, McIntyre WF, McFarling M, Lamy A, Vincent J, Connolly S. Benzodiazepine-Free Cardiac Anesthesia for Reduction of Postoperative Delirium (B-Free): A Protocol for a Multi-centre Randomized Cluster Crossover Trial. CJC Open 2023; 5:691-699. [PMID: 37744662 PMCID: PMC10516716 DOI: 10.1016/j.cjco.2023.06.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 06/01/2023] [Indexed: 09/26/2023] Open
Abstract
Delirium is common after cardiac surgery and is associated with adverse outcomes. Administration of benzodiazepines before and after cardiac surgery is associated with delirium; guidelines recommend minimizing their use. Benzodiazepine administration during cardiac surgery remains common because of its recognized benefits. The Benzodiazepine-Free Cardiac Anesthesia for Reduction of Postoperative Delirium (B-Free) trial is a randomized cluster crossover trial evaluating whether an institutional policy of restricting intraoperative benzodiazepine administration (ie, ≥ 90% of patients do not receive benzodiazepines during cardiac surgery), as compared with a policy of liberal intraoperative benzodiazepine administration (ie, ≥ 90% of patients receive ≥ 0.03 mg/kg midazolam equivalent), reduces delirium. Hospitals performing ≥ 250 cardiac surgeries a year are included if their cardiac anesthesia group agrees to apply both benzodiazepine policies per their randomization, and patients are assessed for postoperative delirium every 12 hours in routine clinical care. Hospitals apply the restricted or liberal benzodiazepine policy during 12 to 18 crossover periods of 4 weeks each. Randomization for all periods takes place in advance of site startup; sites are notified of their allocated policy during the last week of each crossover period. Policies are applied to all patients undergoing cardiac surgery during the trial period. The primary outcome is the incidence of delirium at up to 72 hours after surgery. The B-Free trial will enroll ≥ 18,000 patients undergoing cardiac surgery at 20 hospitals across North America. Delirium is common after cardiac surgery, and benzodiazepines are associated with the occurrence of delirium. The B-Free trial will determine whether an institutional policy restricting the administration of benzodiazepines during cardiac surgery reduces the incidence of delirium after cardiac surgery. Clinicaltrials.gov registration number: NCT03928236 (First registered April 26, 2019).
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Affiliation(s)
- Jessica Spence
- Departments of Anesthesia and Critical Care and Health Research Methods, Evaluation, and Impact, McMaster University; and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | - Emilie Belley-Côté
- Departments of Medicine (Cardiology and Critical Care), and Health Research Methods, Evaluation, and Impact, McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | - Eric Jacobsohn
- Departments of Anesthesia and Perioperative Medicine and Medicine (Critical Care), University of Manitoba, Winnipeg, Manitoba, Canada
| | - Shun Fu Lee
- Department of Health Research Methods, Evaluation, and Impact, McMaster University, and Population Health Research Institute, Hamilton, Ontario, Canada
| | - Frederick D’Aragon
- Département d'anesthésiologie, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Michael Avidan
- Department of Anesthesia, Washington University at St. Louis, St. Louis, Missouri, USA
| | - C. David Mazer
- Department of Anesthesia and Li Ka Shing Knowledge Institute, St. Michael’s Hospital, and Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | | | - Raja Rajamohan
- Department of Anesthesia, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kane Pryor
- Department of Anesthesiology, Weill Cornell Medical College, New York, New York, USA
| | - Rael Klein
- Department of Anesthesia, University of British Columbia, Vancouver, British Columbia, Canada
| | | | - Matthew Cameron
- Department of Anesthesia, McGill University, Montreal, Quebec, Canada
| | - Emily Di Sante
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Erin DeBorba
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Mary Mustard
- St. Michael's Hospital, Toronto, Ontario, Canada
| | - Etienne Couture
- Département d'anesthésiologie, Université Laval, Quebec City, Quebec, Canada
| | - Raffael Zamper
- Department of Anesthesia, University of Western Ontario, London, Ontario, Canada
| | - Michael Law
- Department of Anesthesia, University of British Columbia, Vancouver, British Columbia, Canada
| | - George Djaiani
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Tarit Saha
- Department of Anesthesia, Queen's University, Kingston, Ontario, Canada
| | - Stephen Choi
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Peter Hedlin
- Department of Anesthesia, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Ryan Pikaluk
- Department of Anesthesia, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
| | - Wing Ying Lam
- Department of Anesthesia, University of Alberta, Edmonton, Alberta, Canada
| | - Alain Deschamps
- Département d'anesthésiologie, Université de Montréal, Montréal, Quebec, Canada
| | - Richard Whitlock
- Departments of Surgery (Cardiac Surgery) and Health Research Methods, Evaluation, and Impact, McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | - Braden Dulong
- Department of Anesthesia, Dalhousie University, Halifax, Nova Scotia, Canada
| | - P.J. Devereaux
- Departments of Medicine (Cardiology and Critical Care), and Health Research Methods, Evaluation, and Impact, McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | | | | | - Simon Oczkowski
- Department of Medicine (Critical Care), McMaster University, Hamilton, Ontario, Canada
| | - William Finlay McIntyre
- Department of Medicine (Cardiology), McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | - Matthew McFarling
- Department of Anesthesia, McMaster University, Hamilton, Ontario, Canada
| | - Andre Lamy
- Departments of Surgery (Cardiac Surgery) and Health Research Methods, Evaluation, and Impact, McMaster University, Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
| | - Jessica Vincent
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
| | - Stuart Connolly
- Department of Medicine (Cardiology), McMaster University, and Population Health Research Institute, Hamilton, Ontario, Canada
| | - B-Free Investigators∗
- Departments of Anesthesia and Critical Care and Health Research Methods, Evaluation, and Impact, McMaster University; and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
- Departments of Medicine (Cardiology and Critical Care), and Health Research Methods, Evaluation, and Impact, McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
- Departments of Anesthesia and Perioperative Medicine and Medicine (Critical Care), University of Manitoba, Winnipeg, Manitoba, Canada
- Department of Health Research Methods, Evaluation, and Impact, McMaster University, and Population Health Research Institute, Hamilton, Ontario, Canada
- Département d'anesthésiologie, Université de Sherbrooke, Sherbrooke, Quebec, Canada
- Department of Anesthesia, Washington University at St. Louis, St. Louis, Missouri, USA
- Department of Anesthesia and Li Ka Shing Knowledge Institute, St. Michael’s Hospital, and Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Département d'anesthésiologie, Université de Montréal, Montréal, Quebec, Canada
- Department of Anesthesia, University of British Columbia, Vancouver, British Columbia, Canada
- Department of Anesthesiology, Weill Cornell Medical College, New York, New York, USA
- Department of Anesthesia, Dalhousie University, Halifax, Nova Scotia, Canada
- Department of Anesthesia, McGill University, Montreal, Quebec, Canada
- Population Health Research Institute, McMaster University, Hamilton, Ontario, Canada
- St. Michael's Hospital, Toronto, Ontario, Canada
- Département d'anesthésiologie, Université Laval, Quebec City, Quebec, Canada
- Department of Anesthesia, University of Western Ontario, London, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesia, Queen's University, Kingston, Ontario, Canada
- Department of Anesthesiology and Pain Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Anesthesia, University of Saskatchewan, Saskatoon, Saskatchewan, Canada
- Department of Anesthesia, University of Alberta, Edmonton, Alberta, Canada
- Departments of Surgery (Cardiac Surgery) and Health Research Methods, Evaluation, and Impact, McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
- Sheridan College, Brampton, Ontario, Canada
- Population Health Research Institute, Hamilton, Ontario, Canada
- Department of Medicine (Critical Care), McMaster University, Hamilton, Ontario, Canada
- Department of Medicine (Cardiology), McMaster University, and Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
- Department of Anesthesia, McMaster University, Hamilton, Ontario, Canada
- Departments of Surgery (Cardiac Surgery) and Health Research Methods, Evaluation, and Impact, McMaster University, Perioperative Research Division, Population Health Research Institute, Hamilton, Ontario, Canada
- Department of Medicine (Cardiology), McMaster University, and Population Health Research Institute, Hamilton, Ontario, Canada
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Pace A, Faught BE, Law M, Mateus L, Roy M, Sulowski C, Khowaja A. Economic evaluation of tele-resuscitation intervention on emergency department pediatric visits in the Niagara Region, Canada a pilot study. Front Health Serv 2023; 3:1105635. [PMID: 37342797 PMCID: PMC10277730 DOI: 10.3389/frhs.2023.1105635] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Accepted: 05/17/2023] [Indexed: 06/23/2023]
Abstract
Introduction The use of telemedicine in critical care is emerging, however, there is a paucity of information surrounding the costs relative to health gains in the pediatric population. This study aimed to estimate the cost-effectiveness of a pediatric tele-resuscitation (Peds-TECH) intervention compared to the usual care in five community hospital emergency departments (EDs). Using a decision tree analysis approach with secondary retrospective data from a 3-year time period, this cost-effectiveness analysis was completed. Methods A mixed methods quasi-experimental design was embedded in the economic evaluation of Peds-TECH intervention. Patients aged <18 years triaged as Canadian Triage and Acuity Scale 1 or 2 at EDs were eligible to receive the intervention. Qualitative interviews were conducted with parents/caregivers to explore the out-of-pocket (OOP) expenses. Patient-level health resource utilization was extracted from Niagara Health databases. The Peds-TECH budget calculated one-time technology and operational costs per patient. Base-case analyses determined the incremental cost per year of life lost (YLL) averted, and additional sensitivity analysis confirmed the robustness of the results. Results Odds ratio for mortality among cases was 0.498 (95% CI: 0.173, 1.43). The average cost of a patient receiving the Peds-TECH intervention was $2,032.73 compared to $317.45 in usual care. In total, 54 patients received the Peds-TECH intervention. Fewer children died in the intervention group resulting in 4.71 YLL. The probabilistic analysis revealed an incremental cost-effectiveness ratio of $64.61 per YLL averted. Conclusion Peds-TECH appears to be a cost-effective intervention for resuscitating infants/children in hospital emergency departments.
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Affiliation(s)
- A. Pace
- Department of Health Sciences, Brock University, St. Catharines, ON, Canada
| | - B. E. Faught
- Department of Health Sciences, Brock University, St. Catharines, ON, Canada
| | - M. Law
- Department of Health Sciences, Brock University, St. Catharines, ON, Canada
| | - L. Mateus
- Department of Health Sciences, Brock University, St. Catharines, ON, Canada
| | - M. Roy
- Niagara Health, Niagara Region, ON, Canada
| | - C. Sulowski
- Pediatric Department, McMaster Children’s Hospital, Hamilton, ON, Canada
| | - A. Khowaja
- Department of Health Sciences, Brock University, St. Catharines, ON, Canada
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Teoh Y, Chan T, Tsang C, Li K, Cheng KC, Cho C, Chan HC, Chiu Y, Ho B, Li T, Law M, Lee Y, Cheng C, Lo K, Lam K, Chan K, So HS, Leung C, Chan C, Yiu M, Ng C, Poon V, Leung C, Chi-Fai N. Transurethral en bloc resection versus standard resection of bladder tumour: A multi-center randomized trial (EB-StaR Study). Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00751-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Norman WV, Darling E, Kaczorowski J, Dunn S, Schummers L, Law M, McGrail K. P031Mifepristone as a normal prescription rapidly increased rural and urban providers. Contraception 2022. [DOI: 10.1016/j.contraception.2022.09.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Hong AWJ, James J, Stoney D, Law M. 'Breast Cosmesis After Breast-Conserving Therapy' Who is the Judge, Patient or Surgeon? World J Surg 2022; 46:3051-3061. [PMID: 36169705 DOI: 10.1007/s00268-022-06745-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/10/2022] [Indexed: 01/14/2023]
Abstract
INTRODUCTION More than 80% of newly diagnosed breast cancers are managed with breast-conserving therapy (BCT). Preservation of cosmetically acceptable breasts is an inherent aim of all breast-conserving efforts-this can, however, be difficult to assess objectively. Compounding this is the difference in perception of breast cosmesis between patients and surgeons. This study compares the concordance of a new subscale-based cosmetic score (TCS) with the patient's perception. METHOD Eastern Health Breast and Cancer Centre conducted this study on patients who had completed their BCT and radiotherapy. Participation was voluntary and involved permitting an assessor (breast surgery fellow or consultant) to grade cosmetic outcomes to generate a Total Cosmesis Score (TCS). The patients blinded to this assessment were then asked to complete the postoperative segment of the BCT module of the Breast-Q questionnaire. TCS from surgeon assessment was compared against patient assessment (questions BQ1i and BQ1k specifically). Cohen's kappa was calculated to define the strength of the inter-rater agreement. RESULTS One hundred twelve patients with a mean age of 59 (range 27-89) participated in the study. TCS was low in 26% and high in 74% of participants. 76% and 69% of participants were satisfied when answering Breast-Q questions 'How your lumpectomy breast looks?' and 'How you look in the mirror unclothed?' respectively (Cohen's k = 0.464, 95% CI 0.337-0.591, p < 0.01). The agreement between the TCS and the patient assessment was poor (Cohen's k = 0.172, 95% CI - 0.020-2.093, p = 0.067). CONCLUSION Cosmetic outcomes scored using TCS by surgeons do not match patient's own assessment of the cosmetic result.
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Affiliation(s)
- Alton Wern Jie Hong
- Eastern Health Breast and Cancer Centre, 8 Arnold Street, Box Hill, Melbourne, VIC, 3128, Australia.
| | - J James
- Eastern Health Breast and Cancer Centre, 8 Arnold Street, Box Hill, Melbourne, VIC, 3128, Australia
- Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
| | - D Stoney
- Eastern Health Breast and Cancer Centre, 8 Arnold Street, Box Hill, Melbourne, VIC, 3128, Australia
| | - M Law
- Eastern Health Breast and Cancer Centre, 8 Arnold Street, Box Hill, Melbourne, VIC, 3128, Australia
- Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia
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Lin Y, Chidley P, Admojo L, Jassal S, Zantuck N, Foroudi F, Bevington E, Chew G, Hyett A, Loh S, Ng S, Leech T, Baker C, Law M, Ooi W, Yong C, Chao M. Pathological Complete Response and Oncological Outcomes in Locally Advanced Breast Cancers Treated with Neoadjuvant Radiotherapy: An Australian Perspective. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Hedden L, McCracken RK, Spencer S, Narayan S, Gooderham E, Bach P, Boyd J, Chakanyuka C, Hayashi K, Klimas J, Law M, McGrail K, Nosyk B, Peterson S, Sutherland C, Ti L, Yung S, Cameron F, Fernandez R, Giesler A, Strydom N. Advancing virtual primary care for people with opioid use disorder (VPC OUD): a mixed-methods study protocol. BMJ Open 2022; 12:e067608. [PMID: 36167365 PMCID: PMC9516147 DOI: 10.1136/bmjopen-2022-067608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
INTRODUCTION The emergence of COVID-19 introduced a dual public health emergency in British Columbia, which was already in the fourth year of its opioid-related overdose crisis. The public health response to COVID-19 must explicitly consider the unique needs of, and impacts on, communities experiencing marginalisation including people with opioid use disorder (PWOUD). The broad move to virtual forms of primary care, for example, may result in changes to healthcare access, delivery of opioid agonist therapies or fluctuations in co-occurring health problems that are prevalent in this population. The goal of this mixed-methods study is to characterise changes to primary care access and patient outcomes following the rapid introduction of virtual care for PWOUD. METHODS AND ANALYSIS We will use a fully integrated mixed-methods design comprised of three components: (a) qualitative interviews with family physicians and PWOUD to document experiences with delivering and accessing virtual visits, respectively; (b) quantitative analysis of linked, population-based administrative data to describe the uptake of virtual care, its impact on access to services and downstream outcomes for PWOUD; and (c) facilitated deliberative dialogues to co-create educational resources for family physicians, PWOUD and policymakers that promote equitable access to high-quality virtual primary care for this population. ETHICS AND DISSEMINATION Approval for this study has been granted by Research Ethics British Columbia. We will convene PWOUD and family physicians for deliberative dialogues to co-create educational materials and policy recommendations based on our findings. We will also disseminate findings via traditional academic outputs such as conferences and peer-reviewed publications.
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Affiliation(s)
- Lindsay Hedden
- Simon Fraser University Faculty of Health Sciences, Burnaby, British Columbia, Canada
| | - Rita K McCracken
- Department of Family Practice, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
| | - Sarah Spencer
- Simon Fraser University Faculty of Health Sciences, Burnaby, British Columbia, Canada
| | - Shawna Narayan
- Department of Family Practice, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
| | - Ellie Gooderham
- Simon Fraser University Faculty of Health Sciences, Burnaby, British Columbia, Canada
| | - Paxton Bach
- Department of Medicine, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
- British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada
| | - Jade Boyd
- Department of Medicine, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
- British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada
| | - Christina Chakanyuka
- Faculty of Human and Social Development, University of Victoria School of Nursing, Victoria, British Columbia, Canada
| | - Kanna Hayashi
- Simon Fraser University Faculty of Health Sciences, Burnaby, British Columbia, Canada
- British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada
| | - Jan Klimas
- Department of Family Practice, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
| | - Michael Law
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Kimberlyn McGrail
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Bohdan Nosyk
- Simon Fraser University Faculty of Health Sciences, Burnaby, British Columbia, Canada
- Centre for Health Evaluation & Outcome Sciences, Vancouver, British Columbia, Canada
| | - Sandra Peterson
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Christy Sutherland
- Department of Family Practice, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
| | - Lianping Ti
- Department of Medicine, University of British Columbia Faculty of Medicine, Vancouver, British Columbia, Canada
- British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada
| | - Seles Yung
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, British Columbia, Canada
| | - Fred Cameron
- SOLID Outreach Society, Victoria, British Columbia, Canada
| | | | - Amanda Giesler
- British Columbia Centre on Substance Use, Vancouver, British Columbia, Canada
| | - Nardia Strydom
- Department of Primary Care, Vancouver Coastal Health Authority, Vancouver, British Columbia, Canada
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Mcgrail K, Clement F, Law M. The benefits and challenges of applied, partnered data-intensive research. Int J Popul Data Sci 2022. [DOI: 10.23889/ijpds.v7i3.2085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022] Open
Abstract
ObjectivePopulation data scientists are committed to research that has public value. Much of this research is applied; it is undertaken in partnership with the public, patients, families, as well as policy- and decision-makers. Working directly with policy-makers (who are often also data providers) has advantages, but presents challenges as well.
ApproachWe offer four provocations to stimulate thinking about the relationship between research and the “systems” that research is trying to influence. These provocations include: 1) assessing the implications of “partnership” and who is expected to change or accommodate others’ views, and how this affects researchers’ ability to challenge current practice; 2) challenging the emphasis on short-term over longer-term challenges in systems; 3) moving beyond post-implementation evaluations of policies; and 4) critiquing the current project-specific orientation to assessing return on investment (ROI).
ResultsThe current focus on partnership in applied research tends to suggest that it is researchers who need to be empathetic to the timelines and needs of policy makers. True relationships, however, are bi-directional, and more importantly need to be open to tough conversations and constructive feedback. Further, focusing on priorities of “systems” will emphasize short-term issues. These are important to address, but can crowd out more systemic and structural considerations. This leads to researchers often engaged in post-implementation evaluation where they have had little involvement in policy or intervention design, which may not be evidence-based. Finally, a focus on single-project ROI will tend to undervalue riskier – but also potentially more rewarding – research.
ConclusionIt is important to recognize that valuable research might challenge current thinking and practice, and/or address issues that are not short-term priorities. More early testing of policies before broad implementation will advance evidence. ROI should be viewed as an emergent property rather than an attribute of each individual project.
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11
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Liu L, McCluskey SA, Law M, Abrahamyan L, Peer M, Tait G, Rao V, Wijeysundera DN, Scales DC, Callum J, Karkouti K, Bartoszko J. Albumin use for fluid resuscitation in cardiac surgical patients: a survey of Canadian perioperative care providers. Can J Anaesth 2022; 69:818-831. [PMID: 35378686 DOI: 10.1007/s12630-022-02237-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 01/02/2022] [Accepted: 01/26/2022] [Indexed: 11/25/2022] Open
Abstract
PURPOSE To evaluate the perceptions and practices of Canadian cardiovascular anesthesiologists and intensivists towards intravenous albumin as a resuscitation fluid in patients undergoing cardiac surgery. METHODS We conducted a cross-sectional survey of cardiac anesthesiologists and intensivists involved in the care of cardiac surgical patients. The 22-item survey included seven open-ended questions and assessed practice patterns and attitudes towards albumin. Descriptive statistics were analyzed using counts and proportions. Qualitative data were analyzed to identify themes describing albumin use patterns in Canada. RESULTS A total of 133 respondents from seven provinces participated, with 83 (62%) using albumin perioperatively. The majority of respondents (77%) felt a low fluid balance in cardiac surgical patients was important, and that supplementing crystalloids with albumin was helpful for this objective (67%). There was poor agreement among survey respondents regarding the role of albumin for faster vasopressor weaning or intensive care discharge, and ≥ 90% did not feel albumin reduced mortality, renal injury, or coagulopathy. Nevertheless, cardiac surgical patients were identified as a distinct population where albumin may help to minimize fluid balance. There was an acknowledged paucity of formal evidence supporting possible benefits. Fewer than 10% of respondents could identify institutional or national guidelines for albumin use. A lack of evidence supporting albumin use in cardiac surgical patients, especially those at highest risk of complications, was a frequently identified concern. CONCLUSIONS The majority of Canadian anesthesiologists and intensivists (62%) use albumin in cardiac surgical patients. There is clinical equipoise regarding its utility, and an acknowledged need for higher quality evidence to guide practice.
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Affiliation(s)
- Laura Liu
- Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada
| | - Stuart A McCluskey
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada
- Peter Munk Cardiac Centre and Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Michael Law
- Department of Anesthesia, Pharmacology & Therapeutics, The University of British Columbia, Vancouver, BC, Canada
- Department of Anesthesia, Royal Columbian Hospital, Fraser Health Authority, Vancouver, BC, Canada
| | - Lusine Abrahamyan
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Miki Peer
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada
| | - Gordon Tait
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Vivek Rao
- Division of Cardiac Surgery, Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Duminda N Wijeysundera
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
- Department of Anesthesia, and Li Ka Shing Knowledge Institute, St. Michael's Hospital, Toronto, ON, Canada
| | - Damon C Scales
- Sunnybrook Research Institute, Toronto, ON, Canada
- Interdepartmental Division of Critical Care Medicine, Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Department of Critical Care Medicine, Sunnybrook Health Sciences Centre, Toronto, ON, Canada
| | - Jeannie Callum
- Sunnybrook Research Institute, Toronto, ON, Canada
- Department of Pathology and Molecular Medicine, Kingston Health Sciences Centre and Queens University, Kingston, ON, Canada
| | - Keyvan Karkouti
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada
- Peter Munk Cardiac Centre and Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, ON, Canada
| | - Justyna Bartoszko
- Department of Anesthesia and Pain Management, Toronto General Hospital - University Health Network, Sinai Health System, Women's College Hospital, University of Toronto, Toronto, ON, Canada.
- Peter Munk Cardiac Centre and Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada.
- Department of Anesthesiology and Pain Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada.
- Toronto General Hospital Research Institute, University Health Network, Toronto, ON, Canada.
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12
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Norman W, Darling E, Dunn S, Law M, Kaczorowski J, Schummers L, McGrail K. Mifepristone’s Effect on the Abortion Workforce and Rural Services in Ontario. Journal of Obstetrics and Gynaecology Canada 2022. [DOI: 10.1016/j.jogc.2022.02.088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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13
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McGrail K, Clement F, Law M. The Value of and Need for Health Services and Policy Research that Focuses on Macro System-Level Challenges. Healthc Pap 2022; 20:26-32. [PMID: 35759482 DOI: 10.12927/hcpap.2022.26846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Much of health services and policy research is applied. We offer four provocations to stimulate thinking about the relationship between research and the "systems" it aims to influence. We conclude that a focus on partnership implies that researchers need to be empathetic to the timelines and needs of policy makers, while true relationships are bidirectional. Focusing on the priorities of "systems" will emphasize short-term issues. This leads to researchers often conducting post-implementation evaluation, where they have had little involvement in policy or intervention design. Finally, a focus on single-project return of investment will tend to undervalue riskier - but also potentially more rewarding - research.
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Affiliation(s)
- Kimberlyn McGrail
- Professor, Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, BC
| | - Fiona Clement
- Professor and Head, Department of Community Health Sciences, University of Calgary, Calgary, AB
| | - Michael Law
- Canada Research Chair in Access to Medicines, Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, BC
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14
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Hofmeister M, Sivakumar A, Clement F, Hayes KN, Law M, Guertin JR, Neville HL, Tadrous M. Trends in Canadian prescription drug purchasing: 2001-2020. J Pharm Policy Pract 2022; 15:20. [PMID: 35300714 PMCID: PMC8928614 DOI: 10.1186/s40545-022-00420-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 03/09/2022] [Indexed: 11/10/2022] Open
Abstract
Background In 2019, more than $34.5 billion was spent on prescription drugs in Canada. However, little is known about the distribution of this spending across medications and settings (outpatient and inpatient) over time. The objective of this paper is to describe the largest expenditures by medication class over time in inpatient and outpatient settings. This information can help to guide policies to control prescription medication expenditures. Methods IQVIA’s Canadian Drugstore and Hospital Purchases Audit data from January 1, 2001, to December 31, 2020, were used. In this dataset, purchasing was stratified by outpatient drugstore and inpatient hospital. Spending trajectories in both settings were compared to total expenditure over time. Total expenditure of the 25 medications with the largest expenditure were compared over time, stratified by setting. Nominal costs were used for all analysis. Results In 2001, spending in the outpatient and inpatient settings was greatest on atorvastatin ($467.0 million) and erythropoietin alpha ($91.2 million), respectively. In 2020, spending was greatest on infliximab at $1.2 billion (outpatient) and pembrolizumab at $361.6 million (inpatient). Annual outpatient spending, although increasing, has been growing at a slower rate (5.3%) than inpatient spending (7.0%). In both settings, spending for the top 25 medications has become increasingly concentrated on biologic agents, with a reduction in the diversity of therapeutic classes of agents over time. Discussion Identification of the concentration on spending on biologic agents is a key step in managing costs of prescription medications in Canada. Given the increases in spending on biologic agents over the last 20 years, current cost-control mechanisms may be insufficient. Future research efforts should focus on examining the effectiveness of current cost-control mechanisms and identifying new approaches to cost control for biologic agents. Supplementary Information The online version contains supplementary material available at 10.1186/s40545-022-00420-4.
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Affiliation(s)
- Mark Hofmeister
- Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada.,O'Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada
| | - Ashwinie Sivakumar
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada
| | - Fiona Clement
- Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada.,O'Brien Institute for Public Health, University of Calgary, Calgary, AB, Canada
| | - Kaleen N Hayes
- Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada
| | - Michael Law
- Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia, Vancouver, BC, Canada
| | - Jason R Guertin
- Axe Santé Des Populations et Pratiques Optimales en Santé, Centre de Recherche du CHU de Québec-Université Laval, Québec, Canada.,Department of Social and Preventive Medicine, Université Laval, Québec, Canada
| | - Heather L Neville
- Queen Elizabeth II Health Sciences Centre, Nova Scotia Health Authority, Halifax, NS, Canada
| | - Mina Tadrous
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, ON, Canada. .,Women's College Research Institute, Women's College Hospital, 76 Grenville St., Toronto, ON, Canada. .,ICES, Toronto, ON, Canada.
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15
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Kolbe S, Garcia L, Yu N, Boonstra F, Clough M, Sinclair B, White O, van der Walt A, Butzkueven H, Fielding J, Law M. Lesion Volume in Relapsing Multiple Sclerosis is Associated with Perivascular Space Enlargement at the Level of the Basal Ganglia. AJNR Am J Neuroradiol 2022; 43:238-244. [PMID: 35121585 PMCID: PMC8985682 DOI: 10.3174/ajnr.a7398] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 10/19/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND AND PURPOSE Perivascular spaces surround the blood vessels of the brain and are involved in neuroimmune functions and clearance of metabolites via the glymphatic system of the brain. Enlarged perivascular spaces could be a marker of dysfunction in these processes and, therefore, are highly relevant to monitoring disease activity in MS. This study aimed to compare the number of enlarged perivascular spaces in people with relapsing MS with MR imaging markers of inflammation and brain atrophy. MATERIALS AND METHODS Fifty-nine patients (18 with clinically isolated syndrome, 22 with early and 19 with late relapsing-remitting MS) were scanned longitudinally (mean follow-up duration = 19.6 [SD, 0.5] months) using T2-weighted, T1-weighted, and FLAIR MR imaging. Two expert raters identified and counted enlarged perivascular spaces on T2-weighted MR images from 3 ROIs (the centrum semiovale, basal ganglia, and midbrain). Baseline and change with time in the number of enlarged perivascular spaces were correlated with demographics and lesion and brain volumes. RESULTS Late relapsing-remitting MS had a greater average number of enlarged perivascular spaces at baseline at the level of the basal ganglia (72.3) compared with early relapsing-remitting MS (60.5) and clinically isolated syndrome (54.7) (F = 3.4, P = .042), and this finding correlated with lesion volume (R = 0.44, P = .0004) but not brain atrophy (R = -0.16). Enlarged perivascular spaces increased in number with time in all regions, and the rate of increase did not differ among clinical groups. CONCLUSIONS Enlarged perivascular spaces at the level of the basal ganglia are associated with greater neuroinflammatory burden, and the rate of enlargement appears constant in patients with relapsing-remitting disease phenotypes.
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Affiliation(s)
- S.C. Kolbe
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Departments of Radiology (S.C.K., M.L.)
| | - L.M. Garcia
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia
| | - N. Yu
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Department of Neurology (N.Y.), The Nanjing Brain Hospital Affiliated with Nanjing Medical University, Nanjing, Jiangsu, China
| | - F.M. Boonstra
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia
| | - M. Clough
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia
| | - B. Sinclair
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia
| | - O. White
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Neurology (O.W., A.v.d.W., H.B.), Alfred Hospital, Melbourne, Victoria, Australia
| | - A. van der Walt
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Neurology (O.W., A.v.d.W., H.B.), Alfred Hospital, Melbourne, Victoria, Australia
| | - H. Butzkueven
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Neurology (O.W., A.v.d.W., H.B.), Alfred Hospital, Melbourne, Victoria, Australia
| | - J. Fielding
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia
| | - M. Law
- From the Department of Neuroscience (S.C.K., L.M.G., N.Y., F.M.B., M.C., B.S., O.W., A.v.d.W., H.B., J.F., M.L.) Monash University, Melbourne, Victoria, Australia,Departments of Radiology (S.C.K., M.L.)
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16
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Fogla R, Gujar P, Law M. Do-it-yourself adapter for fundus examination with 90D and 78D lens. Indian J Ophthalmol 2022; 70:653-654. [PMID: 35086256 PMCID: PMC9023971 DOI: 10.4103/ijo.ijo_1986_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
The COVID-19 pandemic has brought a radical change in safety measures in outpatient clinics. The use of face masks by patients and healthcare workers has become a mandatory norm. Exhaled air with a face mask often follows an upward route. The warm exhaled air leads to fogging of 90/78D lens during fundus examination, hampering visualization. This can be prevented by the use of a simple yet innovative DIY adapter for a 90/78D lens, which can be made using simple household items such as PVC pipes or water hose pipes.
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Affiliation(s)
- Rajesh Fogla
- Department of Cornea, Apollo Hospital, Jubliee Hills, Hyderabad, Telangana, India
| | - Prateek Gujar
- Department of Cornea, Sudarshan Netralaya, Bhopal, Madhya Pradesh, India
| | - Michael Law
- Consultant Ophthalmologist and Eye Surgeon, International Specialist Eye Centre, Kuala Lumpur, Malaysia
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17
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Law M, Ritov Y. Inference and Estimation for Random Effects in High-Dimensional Linear Mixed Models. J Am Stat Assoc 2022. [DOI: 10.1080/01621459.2021.2004896] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Michael Law
- Department of Statistics, University of Michigan, Ann Arbor, MI
| | - Ya’acov Ritov
- Department of Statistics, University of Michigan, Ann Arbor, MI
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18
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James J, Teo M, Ramachandran V, Law M, Cheng M. Performance, clinical utility, and cost-effectiveness of selective use of staging investigations in early breast cancers. ANZ J Surg 2021; 92:426-430. [PMID: 34723441 DOI: 10.1111/ans.17324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Revised: 10/15/2021] [Accepted: 10/17/2021] [Indexed: 11/30/2022]
Abstract
BACKGROUND International guidelines do not recommend routine staging of EBCs. However, most clinicians still perform staging investigations (SI) selectively for several reasons. We examined our practice of selective use of SI to determine its performance, clinical utility, and cost-effectiveness. METHODS We performed this retrospective study on patients who had treatment for AJCC stage I or stage II breast cancer through Eastern health Breast and cancer centre, Melbourne, for 50 months from January 2012. RESULT Our practice of selective use resulted in SI in 41% of all EBCs (95% CI 37-46%). Overall yield was 3% (95% CI 0.4-5.4%) with a false positive rate of 22% (95% CI 1628%) and a false-negative rate of 45% (95% CI 11-79%). The sensitivity of SI is 55% (95% CI 21-89%) with a negative predictive value of 97% (95% CI 94.8-99.9%). None of the treatment components was found to be significantly changed based on findings on SI. There was no significant difference in all-cause mortality or new distant recurrence in the staged and non-staged groups. Identification of six new metastases cost at least 422 021 AUD. The approximate cost to stage one EBC is 2069 AUD. 'Number needed to scan' to detect one new metastasis is 34 at the expense of 70337AUD. CONCLUSION Selective use of SI results in better yield. However, the clinical utility of these results is not significant. It is debatable if this level of expenditure is cost-effective. Our results point to a need for change in practice.
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Affiliation(s)
- Justin James
- Department of Breast and Endocrine Surgery, Eastern Health Breast and Cancer Centre, Melbourne, Victoria, Australia.,Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Victoria, Australia
| | - Melanie Teo
- Department of Breast and Endocrine Surgery, Eastern Health Breast and Cancer Centre, Melbourne, Victoria, Australia
| | - Vivekananda Ramachandran
- Department of Breast and Endocrine Surgery, Eastern Health Breast and Cancer Centre, Melbourne, Victoria, Australia
| | - Michael Law
- Department of Breast and Endocrine Surgery, Eastern Health Breast and Cancer Centre, Melbourne, Victoria, Australia
| | - Michael Cheng
- Department of Breast and Endocrine Surgery, Eastern Health Breast and Cancer Centre, Melbourne, Victoria, Australia
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19
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Bennett I, Khoo JF, De Viana D, Law M. Australian breast surgeons and ultrasound usage: Have practices changed? Australas J Ultrasound Med 2021; 24:217-224. [PMID: 34888131 PMCID: PMC8591276 DOI: 10.1002/ajum.12277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 05/17/2021] [Accepted: 05/30/2021] [Indexed: 11/05/2022] Open
Abstract
BACKGROUND A recent survey of surgeon performed ultrasound usage was conducted amongst registered members of the Breast Surgeons of Australia and New Zealand Society (BreastSurgANZ) and was compared with a previous survey undertaken in 2010 to determine whether patterns of utilization had changed. METHODS From July to September 2019, members of BreastSurgANZ were invited to complete an electronic online survey of personal usage of breast ultrasound focusing on ultrasound equipment access, use of office and intraoperative ultrasound, biopsy interventions and training expectations. RESULTS There were 73 respondents to the survey with 45 (61.6%) members indicating access to ultrasound within their practices. Whilst current regular ultrasound usage (68.1%) was only slightly greater than in 2010 (66%), the proportion of respondents not performing any form of needle intervention had increased (62.5% compared to 53% in 2010) and with the proportion of surgeons currently performing >10 biopsies per month decreasing from 10% to only 5.56%. However the percentage of surgeons utilizing intraoperative ultrasound had notably increased since 2010 with 49.3% currently using ultrasound in the operating room compared with only 17% previously. The majority of respondents believed that breast ultrasound training should be conducted through BreastSurgANZ post fellowship training programs. CONCLUSION The overall utilization of surgeon-performed ultrasound amongst BreastSurgANZ members has remained similar over the past 9 years with the performance of needle interventions declining slightly, but with the application of intraoperative ultrasound having increased. An ultrasound training curriculum as part of the BreastSurgANZ post fellowship training program is a necessary imperative.
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Affiliation(s)
- Ian Bennett
- Department of SurgeryPrincess Alexandra HospitalUniversity of QldWoolloongabba, BrisbaneQueenslandAustralia
- Translational Research Institute (TRI)Princess Alexandra HospitalWoolloongabba, BrisbaneQueenslandAustralia
| | - Jeremy F. Khoo
- Department of SurgeryPrincess Alexandra HospitalUniversity of QldWoolloongabba, BrisbaneQueenslandAustralia
- Translational Research Institute (TRI)Princess Alexandra HospitalWoolloongabba, BrisbaneQueenslandAustralia
| | - Daniel De Viana
- BreastScreen Qld Gold CoastPremion PlaceSouthportQueenslandAustralia
| | - Michael Law
- Breast and Endocrine Surgery UnitEastern HealthBox HillVictoriaAustralia
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20
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Affiliation(s)
- Michael Law
- Department of Statistics, University of Michigan, Ann Arbor, USA
| | - Ya’acov Ritov
- Department of Statistics, University of Michigan, Ann Arbor, USA
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21
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Hing CB, Tutton E, Smith TO, Glaze M, Stokes JR, Cook J, Dritsaki M, Phelps E, Cooper C, Trompeter A, Pearse M, Law M, Costa ML. Correction to: Reamed intramedullary nailing versus circular frame external fixation for segmental tibial fractures (STIFF-F): a mixed methods feasibility study. Pilot Feasibility Stud 2021; 7:102. [PMID: 33931132 PMCID: PMC8086333 DOI: 10.1186/s40814-021-00842-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Affiliation(s)
- Caroline B Hing
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK.
| | - Elizabeth Tutton
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Toby O Smith
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.,Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, Norfolk, UK
| | - Molly Glaze
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Jamie R Stokes
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Jonathan Cook
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Melina Dritsaki
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Emma Phelps
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Cushla Cooper
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Alex Trompeter
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK
| | | | - Michael Law
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK
| | - Matthew L Costa
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
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22
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Herbert S, Puhr R, Petoumenos K, Lewis DA, Varma R, Couldwell DL, Law M, Templeton DJ. Characteristics of heterosexually-acquired compared to homosexually-acquired HIV and implications for clinical practice: results from the Australian HIV Observational Database. AIDS Care 2021; 34:626-632. [PMID: 33856950 DOI: 10.1080/09540121.2021.1884181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Heterosexuals living with HIV report feeling additional HIV stigma compared to homosexual men, which may affect clinical outcomes. Yet, beyond routinely collected surveillance data, little is known about the characteristics of individuals who acquire HIV heterosexually and clinical outcomes by mode of sexual acquisition have not been directly compared. Using data from the Australian HIV Observational Database, we compared clinical characteristics of those with heterosexually-acquired (Het-HIV) to homosexually-acquired HIV (Hom-HIV) to investigate any differences and their implications for clinical management. 513 Het-HIV and 1467 Hom-HIV patients were included and contributed 3,127 and 9,457 person-years of follow-up, respectively. Compared with Hom-HIV, Het-HIV were more often born outside Australia (62.5% vs 39.9%, p<0.001), less likely to have Hepatitis C (4.8% vs 7.8%, p=0.029) and had lower median CD4 counts at diagnosis (292 vs 450 cells/µL, p<0.001) and cART initiation (270 vs 340 cells/µL, p<0.001). Despite these lower CD4 counts, there were no significant differences between groups for time to the major clinical endpoints of cART initiation, viral suppression, virological failure or all-cause mortality. Het-HIV had a lower risk of loss-to-follow-up than Hom-HIV (aHR 0.78; 95% CI 0.64-0.95). Further studies examining factors associated with, and interventions to inform retention in care are required.
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Affiliation(s)
- S Herbert
- Department of Sexual Health Medicine, Sydney Local Health District, Sydney, Australia
| | - R Puhr
- The Kirby Institute, UNSW Sydney, Sydney, Australia
| | - K Petoumenos
- The Kirby Institute, UNSW Sydney, Sydney, Australia
| | - D A Lewis
- Western Sydney Sexual Health Centre, Parramatta, Australia.,Sydney Medical School, The University of Sydney, Sydney, Australia
| | - R Varma
- The Kirby Institute, UNSW Sydney, Sydney, Australia.,Sydney Sexual Health Centre, South Eastern Sydney Local Health District, Sydney, Australia
| | - D L Couldwell
- Western Sydney Sexual Health Centre, Parramatta, Australia
| | - M Law
- The Kirby Institute, UNSW Sydney, Sydney, Australia
| | - D J Templeton
- Department of Sexual Health Medicine, Sydney Local Health District, Sydney, Australia.,The Kirby Institute, UNSW Sydney, Sydney, Australia.,Sydney Medical School, The University of Sydney, Sydney, Australia
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23
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Hing CB, Tutton E, Smith TO, Glaze M, Stokes JR, Cook J, Dritsaki M, Phelps E, Cooper C, Trompeter A, Pearse M, Law M, Costa ML. Reamed intramedullary nailing versus circular frame external fixation for segmental tibial fractures (STIFF-F): a mixed methods feasibility study. Pilot Feasibility Stud 2021; 7:93. [PMID: 33838694 PMCID: PMC8035735 DOI: 10.1186/s40814-021-00821-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2020] [Accepted: 03/10/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Segmental tibial fractures are fractures in two or more areas of the tibial diaphysis resulting in a separate intercalary segment of the bone. Surgical fixation is recommended for patients with segmental tibial fractures as non-operative treatment outcomes are poor. The most common surgical interventions are intramedullary nailing (IMN) and circular frame external fixation (CFEF), but evidence about which is better is of poor quality. An adequately powered randomised controlled trial (RCT) to determine optimum treatment is required. STIFF-F aimed to assess the feasibility of a multicentre RCT comparing IMN with CFEF for segmental tibial fracture. METHODS STIFF-F was a mixed-methods feasibility study comprising a pilot RCT conducted at six UK Major Trauma Centres, qualitative interviews drawing on Phenomenology and an online survey of rehabilitation. The primary outcome was recruitment rate. Patients, 16 years and over, with a segmental tibial fracture (open or closed) deemed suitable for IMN or CFEF were eligible to participate. Randomisation was stratified by site using random permuted blocks of varying sizes. Participant or assessor blinding was not possible. Interviews were undertaken with patients about their experience of injury, treatment, recovery and participation. Staff were interviewed to identify contextual factors affecting trial processes, their experience of recruitment and the treatment pathway. An online survey was developed to understand the rehabilitation context of the treatments. RESULTS Eleven patients were screened and three recruited to the pilot RCT. Nineteen staff and four patients participated in interviews, and 11 physiotherapists responded to the survey. This study found the following: (i) segmental tibial fractures were rarer than anticipated, (ii) the complexity of the injury, study setup times and surgeon treatment preferences impeded recruitment, (iii) recovery from a segmental tibial fracture is challenging, and rehabilitation protocols are inconsistent and (iv) despite the difficulty recruiting, staff valued this research question and strived to find a way forward. CONCLUSION The proposed multicentre RCT comparing IMN with CFEF is not feasible. This study highlighted the difficulty of recruiting patients to an RCT of a complex rare injury over a short time period. TRIAL REGISTRATION The study was registered with the International Standard Randomised Controlled Trials Number Registry: ISRCTN11229660.
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Affiliation(s)
- Caroline B Hing
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK.
| | - Elizabeth Tutton
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Toby O Smith
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK.,Faculty of Medicine and Health Sciences, University of East Anglia, Norwich, Norfolk, UK
| | - Molly Glaze
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Jamie R Stokes
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Jonathan Cook
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Melina Dritsaki
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Emma Phelps
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Cushla Cooper
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
| | - Alex Trompeter
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK
| | | | - Michael Law
- Department of Trauma and Orthopaedics, St George's University Hospitals NHS Foundation Trust, London, UK
| | - Matthew L Costa
- Nuffield Department of Orthopaedics, Rheumatology and Musculoskeletal Sciences, University of Oxford, Oxford, UK
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24
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Chidley P, Foroudi F, Tacey M, Khor R, Yeh J, Bevington E, Hyett A, Loh SW, Chew G, McCracken J, Neoh D, Yeo B, Baker C, Jassal S, Law M, Zantuck N, Cokelek M, Guerrieri M, Brown B, Stoney D, Ng M, Chao M. Neoadjuvant radiotherapy for locally advanced and high-risk breast cancer. J Med Imaging Radiat Oncol 2021; 65:345-353. [PMID: 33821576 DOI: 10.1111/1754-9485.13180] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 03/08/2021] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Neoadjuvant radiotherapy (NART) as part of a multi-modality approach for locally advanced breast cancer (LABC) requires further investigation. Importantly, this approach may allow for a single-staged surgical procedure, with mastectomy and immediate autologous reconstruction. Multiple other potential benefits of NART include improved pathological downstaging of breast disease, reduced overall treatment time, elimination of time period with breast tissue deficit and improved patient satisfaction. METHODS This is a retrospective multi-institutional review of patients with LABC and high-risk breast disease undergoing NART. Eligible patients sequentially underwent neoadjuvant chemotherapy (NACT) with or without HER2-targeted therapy, NART, followed by mastectomy with immediate autologous breast reconstruction (BR) 4- to 6 weeks post-completion of radiotherapy. Patient and tumour characteristics were analysed using descriptive statistics. Surgical complications were assessed using the Clavien-Dindo Classification (Ann Surg 2004; 240: 205). RESULTS From 3/2013 to 9/2019, 153 patients were treated with NART. The median age was 47 years (IQR 42-52), with median body mass index of 27. Eighteen patients experienced Grade 3 acute surgical complications. This included 13 Grade 3B breast-site events and 9 Grade 3B donor-site events, where further surgical intervention was required for management of wound infection, wound dehiscence, flap or mastectomy skin necrosis, haematoma and internal mammary venous anastomotic thrombosis. No autologous flap loss was observed. CONCLUSION Neoadjuvant radiotherapy facilitates a single-stage surgical procedure with mastectomy and immediate autologous BR, eliminating the delay to reconstructive surgery and thus shortening a woman's breast cancer journey. The findings of this review support the use of NART, with comparable rates of surgical complications to standard sequencing.
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Affiliation(s)
- Phoebe Chidley
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Farshad Foroudi
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia.,University of Melbourne, Melbourne, Victoria, Australia
| | - Mark Tacey
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia.,Melbourne School of Population and Global Health, University of Melbourne, Carlton, Victoria, Australia
| | - Richard Khor
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Janice Yeh
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Elaine Bevington
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Anthony Hyett
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Su Wen Loh
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Grace Chew
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - James McCracken
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Derek Neoh
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Belinda Yeo
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia
| | - Caroline Baker
- St Vincent's Hospital Melbourne, Fitzroy, Victoria, Australia
| | | | - Michael Law
- Eastern Health, Melbourne, Victoria, Australia
| | | | - Margaret Cokelek
- Genesis Care Victoria, Ringwood Private Hospital, Ringwood East, Victoria, Australia
| | - Mario Guerrieri
- Genesis Care Victoria, Ringwood Private Hospital, Ringwood East, Victoria, Australia
| | | | | | - Michael Ng
- Genesis Care Victoria, Ringwood Private Hospital, Ringwood East, Victoria, Australia
| | - Michael Chao
- Olivia Newton-John Cancer Wellness and Research Centre, Austin Health, Heidelberg, Victoria, Australia.,University of Melbourne, Melbourne, Victoria, Australia.,Eastern Health, Melbourne, Victoria, Australia.,Genesis Care Victoria, Ringwood Private Hospital, Ringwood East, Victoria, Australia
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25
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Holt E, Mantel A, Cokelek M, Tacey M, Jassal S, Law M, Zantuck N, Yong C, Cheng M, Viotto A, Foroudi F, Chao M. Volumetric arc therapy: A viable option for right-sided breast with comprehensive regional nodal irradiation in conjunction with deep inspiration breath hold. J Med Imaging Radiat Sci 2021; 52:223-237. [PMID: 33771509 DOI: 10.1016/j.jmir.2021.02.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2020] [Revised: 02/21/2021] [Accepted: 02/22/2021] [Indexed: 02/08/2023]
Abstract
PURPOSE Deep inspiration breath hold (DIBH) is an innovative technique routinely used for left-sided breast radiotherapy to significantly reduce harmful dose to the heart and ipsilateral lung. Currently, there is scant literature exploring DIBH for right-sided whole breast and regional nodal irradiation (WB & RNI). The purpose of this study is to examine if DIBH produces a clinically significant reduction in organ at risk (OAR) dose for right-sided WB + RNI, whilst comparatively analysing the use of volumetric arc therapy (VMAT) versus tangential inverse modulated radiotherapy (t-IMRT). METHODS AND MATERIALS Ten patients, previously treated for left sided breast cancer (with a FB and DIBH CT scan), were selected from our database to be retrospectively replanned to the right breast and nodal regions. Planning target volumes (PTV) were marked to include the whole right breast and regional nodes, encompassing the supraclavicular fossa (SCF) and internal mammary nodes (IMN). PTVs and OARs were contoured on the Pinnacle workstation according to the Radiation Therapy Oncology Group (RTOG) guidelines. VMAT and t-IMRT plans were generated to a prescribed dose of 50 Gy in 25 fractions on both the DIBH and FB data sets for dosimetric analysis. RESULTS Coverage of the right breast (mean, D95%) and SCF (D95%) were significantly improved with VMAT in comparison to t-IMRT, with no statistically significant variation on the IMN PTV (D95%). The use of DIBH did not impact PTV coverage compared with FB. VMAT reduced dose to the ipsilateral lung (mean, V20Gy), combined lungs (mean, V20Gy) and liver (D2cc); conversely dose to the heart (mean), left lung (mean, V5Gy) and contralateral breast (mean) were increased. For both techniques DIBH significantly improved dose to OARs including the ipsilateral lung (mean, V20Gy, V5Gy), total lung (mean, V20Gy), heart (mean, V25Gy) and liver (D2cc) when compared to FB. CONCLUSION DIBH could be considered for patients treated with right-sided WB and RNI due to a significant decrease in heart, ipsilateral lung, total lung and liver doses. VMAT significantly improves PTV coverage over t-IMRT whilst reducing dose to the ipsilateral lung and liver, albeit to the detriment of the left lung, contralateral breast and heart. The increase in heart dose can be mitigated by the use of DIBH. We recommend if VMAT is utilised for superior target volume coverage, DIBH should also be implemented to reduce OAR toxicity. RÉSUMÉ: BUT: La retenue respiratoire profonde (DIBH) est une technique innovante couramment utilisée pour la radiothérapie du cÔté gauche du sein afin de réduire de manière significative la dose nocive pour le cŒur et le poumon ipsilatéral (13-15). Actuellement, il existe peu d'ouvrages sur la DIBH pour l'irradiation du sein entier du cÔté droit et des nodules régionaux (WB+RNI). L'objectif de cette étude est d'examiner si la DIBH produit une réduction cliniquement significative de la dose d'organe à risque (OAR) pour la WB+RNI du cÔté droit, tout en analysant comparativement l'utilisation de l'arcthérapie volumétrique (VMAT) par rapport à la radiothérapie par modulation d'intensité tangentielle (t-IMRT). MéTHODOLOGIE ET MATéRIEL: Dix scans tomodensitométriques avec un ensemble de données DIBH et de respiration libre (FB) ont été sélectionnés de manière rétrospective. Les volumes cibles de planification (PTV) ont été marqués pour inclure le sein droit entier et les ganglions régionaux, englobant la fosse supraclaviculaire (SCF) et les ganglions mammaires internes (IMN). Les PTV et les OAR ont été définis sur la station de travail Pinnacle conformément aux directives du groupe de radiothérapie oncologique (RTOG) (17). Les plans t-IMRT et VMAT ont été générés pour une dose prescrite de 50Gy en 25 fractions sur les ensembles de données DIBH et FB pour l'analyse dosimétrique. RéSULTATS: La couverture du sein droit (moyenne, D95%) et du SCF (D95%) a été significativement améliorée avec la VMAT par rapport à la t-IMRT, sans variation statistiquement significative sur la PTV IMN (D95%). L'utilisation de la DIBH n'a pas eu d'impact sur la couverture du PTV par rapport à la FB. La VMAT a réduit la dose dans le poumon ipsilatéral (moyenne, V20Gy), les poumons combinés (moyenne, V20Gy) et le foie (D2cc) ; à l'inverse, la dose dans le cŒur (moyenne), le poumon gauche (moyenne, V5Gy) et le sein controlatéral (moyenne) a été augmentée. Pour les deux techniques, la DIBH a amélioré de manière significative la dose aux OAR, y compris le poumon ipsilatéral (moyenne, V20Gy, V5Gy), le poumon total (moyenne, V20Gy), le cŒur (moyenne, V25Gy) et le foie (D2cc), par rapport à la respiration libre. CONCLUSION La DIBH pourrait être envisagé pour les patients traités par WB+RNI du cÔté droit en raison d'une diminution significative des doses dans le cŒur, le poumon ipsilatéral, le poumon total et le foie. La VMAT améliore considérablement la couverture de la PTV par rapport à la t-IMRT tout en réduisant la dose dans le poumon ipsilatéral et le foie, mais au détriment du poumon gauche, du sein controlatéral et du cŒur. L'augmentation de la dose au cŒur peut être atténuée par l'utilisation de la DIBH. Nous recommandons, si la VMAT est utilisée pour une couverture supérieure du volume cible, de mettre également en Œuvre la DIBH pour réduire la toxicité aux OAR.
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Affiliation(s)
- Emily Holt
- GenesisCare Victoria, Ringwood Private Hospital, VIC, Australia.
| | - Amanda Mantel
- GenesisCare Victoria, Ringwood Private Hospital, VIC, Australia
| | - Margaret Cokelek
- Olivia Newton John Cancer and Wellness Centre, Heidelberg, VIC, Australia
| | - Mark Tacey
- Olivia Newton John Cancer and Wellness Centre, Heidelberg, VIC, Australia; Melbourne School of Population and Global Health, University of Melbourne, Carlton, VIC, Australia
| | - Sunny Jassal
- Maroondah Hospital, Ringwood East, VIC, Australia
| | - Michael Law
- Maroondah Hospital, Ringwood East, VIC, Australia
| | | | - Charles Yong
- Maroondah Hospital, Ringwood East, VIC, Australia
| | | | - Angela Viotto
- Olivia Newton John Cancer and Wellness Centre, Heidelberg, VIC, Australia
| | - Farshad Foroudi
- Olivia Newton John Cancer and Wellness Centre, Heidelberg, VIC, Australia
| | - Michael Chao
- GenesisCare Victoria, Ringwood Private Hospital, VIC, Australia; Maroondah Hospital, Ringwood East, VIC, Australia.
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26
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Bennett I, de Viana D, Law M, Saboo A. Surgeon-Performed Vacuum-Assisted Biopsy of the Breast: Results from a Multicentre Australian Study. World J Surg 2020; 44:819-824. [PMID: 31712841 DOI: 10.1007/s00268-019-05266-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Image-guided interventional techniques such as vacuum-assisted biopsy are being increasingly utilised in the diagnosis and management of breast conditions. The purpose of this study was to report the outcome of a series of vacuum-assisted biopsies and vacuum-assisted excisions performed by specialist breast surgeons in a largely outpatient setting. METHODS An Australian multicentre trial of ultrasound-guided surgeon-performed vacuum-assisted biopsy (VAB) and vacuum-assisted excision (VAE) of breast lesions was conducted involving three surgeons in three participating centres. VAEs were performed for presumed or proven benign breast lesions only. RESULTS A total of 225 surgeon-performed ultrasound-guided vacuum-assisted procedures were undertaken in 197 patients. Of the 225 VAB procedures, 51 (22.7%) were performed as diagnostic cores and 174 (77.3%) were undertaken as core excisions. Of the 174 VAE procedures undertaken with intent of completely excising the lesion, successful excision of the lesion was achieved in 165 of these cases (94.8%), with complete excision being judged by the absence of any lesion seen on ultrasound following the procedure or the absence of the lesion on a subsequent interval ultrasound examination. A total of 199 procedures were performed in the outpatients setting under local anaesthesia, and 26 procedures were performed in an operating theatre setting under neurolept anaesthesia. The average size of lesions was 19.3 mm in the diagnostic core group and 10.6 mm in the core excision group. The average time for either procedure was approximately 14 min. CONCLUSION Specialist breast surgeons familiar with ultrasound can be readily upskilled to perform vacuum-assisted procedures safely and expeditiously. VAE represents a minimally invasive method of breast lesion management and is a technique with which breast surgeons should become adept.
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Affiliation(s)
- Ian Bennett
- Princess Alexandra Hospital, Brisbane, Australia. .,University of Queensland, Brisbane, Australia. .,Silverton Place, Suite 60, Level 5, 101 Wickham Terrace, Brisbane, QLD, 4000, Australia.
| | - Daniel de Viana
- Premion Place, Southport, Australia.,Breastscreen Queensland Gold Coast, Southport, Australia
| | - Michael Law
- Breast and Endocrine Surgery Unit, Eastern Health, Box Hill, VIC, Australia
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27
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Ross J, Jiamsakul A, Kumarasamy N, Azwa I, Merati TP, Do CD, Lee MP, Ly PS, Yunihastuti E, Nguyen KV, Ditangco R, Ng OT, Choi JY, Oka S, Sohn AH, Law M. Virological failure and HIV drug resistance among adults living with HIV on second-line antiretroviral therapy in the Asia-Pacific. HIV Med 2020; 22:201-211. [PMID: 33151020 DOI: 10.1111/hiv.13006] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2020] [Revised: 09/30/2020] [Accepted: 10/03/2020] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To assess second-line antiretroviral therapy (ART) virological failure and HIV drug resistance-associated mutations (RAMs), in support of third-line regimen planning in Asia. METHODS Adults > 18 years of age on second-line ART for ≥ 6 months were eligible. Cross-sectional data on HIV viral load (VL) and genotypic resistance testing were collected or testing was conducted between July 2015 and May 2017 at 12 Asia-Pacific sites. Virological failure (VF) was defined as VL > 1000 copies/mL with a second VL > 1000 copies/mL within 3-6 months. FASTA files were submitted to Stanford University HIV Drug Resistance Database and RAMs were compared against the IAS-USA 2019 mutations list. VF risk factors were analysed using logistic regression. RESULTS Of 1378 patients, 74% were male and 70% acquired HIV through heterosexual exposure. At second-line switch, median [interquartile range (IQR)] age was 37 (32-42) years and median (IQR) CD4 count was 103 (43.5-229.5) cells/µL; 93% received regimens with boosted protease inhibitors (PIs). Median duration on second line was 3 years. Among 101 patients (7%) with VF, CD4 count > 200 cells/µL at switch [odds ratio (OR) = 0.36, 95% confidence interval (CI): 0.17-0.77 vs. CD4 ≤ 50) and HIV exposure through male-male sex (OR = 0.32, 95% CI: 0.17-0.64 vs. heterosexual) or injecting drug use (OR = 0.24, 95% CI: 0.12-0.49) were associated with reduced VF. Of 41 (41%) patients with resistance data, 80% had at least one RAM to nonnucleoside reverse transcriptase inhibitors (NNRTIs), 63% to NRTIs, and 35% to PIs. Of those with PI RAMs, 71% had two or more. CONCLUSIONS There were low proportions with VF and significant RAMs in our cohort, reflecting the durability of current second-line regimens.
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Affiliation(s)
- J Ross
- TREAT Asia/amfAR -The Foundation for AIDS Research, Bangkok, Thailand
| | - A Jiamsakul
- The Kirby Institute, UNSW Sydney, Kensington, NSW, Australia
| | - N Kumarasamy
- Chennai Antiviral Research and Treatment Clinical Research Site (CART CRS), VHS-Infectious Diseases Medical Centre, VHS, Chennai, India
| | - I Azwa
- Infectious Diseases Unit, Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - T P Merati
- Faculty of Medicine Udayana University & Sanglah Hospital, Bali, Indonesia
| | - C D Do
- Bach Mai Hospital, Hanoi, Vietnam
| | - M P Lee
- Queen Elizabeth Hospital, Hong Kong SAR, Hong Kong
| | - P S Ly
- National Center for HIV/AIDS, Dermatology & STDs, Phnom Penh, Cambodia
| | - E Yunihastuti
- Faculty of Medicine, Universitas Indonesia - Dr Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - K V Nguyen
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - R Ditangco
- Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - O T Ng
- Tan Tock Seng Hospital, Singapore, Singapore
| | - J Y Choi
- Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - S Oka
- National Center for Global Health and Medicine, Tokyo, Japan
| | - A H Sohn
- TREAT Asia/amfAR -The Foundation for AIDS Research, Bangkok, Thailand
| | - M Law
- The Kirby Institute, UNSW Sydney, Kensington, NSW, Australia
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28
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Chao M, Baker C, Jassal S, Law M, Bevington E, Stoney D, Zantuck N, Chew G, Loh S, Hyett A, Guerrieri M, Ng M, Cokelek M, Neoh D, Yong C, Ho H, Tacey M, Lim Joon D, Khor R, Foroudi F. The Pathological Response of Her2+ Breast Cancer with Neoadjuvant Chemotherapy and Radiation Therapy. Int J Radiat Oncol Biol Phys 2020. [DOI: 10.1016/j.ijrobp.2020.07.1027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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29
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Chao M, Jassal S, Baker C, Tacey M, Law M, Loh S, Cheng M, Yong C, Zantuck N, Bevington E, Hyett A, Guerrieri M, Cokelek M, Brown B, Chipman M, Chew G, Yeo B, Lippey J, Neoh D, Lamoury G, Spillane A, Foley C, Kechagioglou P, Rolfo M, Foroudi F. OC-0330: Neoadjuvant breast radiotherapy for one stage mastectomy and autologous breast reconstruction. Radiother Oncol 2020. [DOI: 10.1016/s0167-8140(21)00354-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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James J, Teo M, Ramachandran V, Law M, Ip E, Cheng M. Looking for Metastasis in Early Breast Cancer: Does Bone Scan Help? A Retrospective Review. Clin Breast Cancer 2020; 21:e18-e21. [PMID: 32950408 DOI: 10.1016/j.clbc.2020.07.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 06/06/2020] [Accepted: 07/06/2020] [Indexed: 01/18/2023]
Abstract
BACKGROUND Routine staging investigations are not recommended for early breast cancer (EBC). Staging scans and further confirmatory tests add to the cost of breast cancer treatment. Despite recommendations from international guidelines, whole body bone scan (BS) is commonly used for staging EBC. We examined our experience with BS as a staging investigation when selectively used in EBC. PATIENTS AND METHODS All EBC patients who underwent treatment through the Eastern Health breast unit during a 50-month period from January 2012 were included in this study. All staging BS results were reviewed to evaluate yield and false-positive rate. The causes of false-positive results were analyzed. The role of BS when performed along with computed tomographic scans of chest, abdomen, and pelvis (CTCAP) was evaluated. RESULTS Even with the selective use of BS, we could only achieve a yield of 1% (95% confidence interval, -0.6, 2.7) in EBC. When combined with CTCAP, only one additional metastasis was detected in 194 BSs. CONCLUSION BS plays only a limited role in staging EBC. Patients who have undergone CTCAP will experience minimal benefit by undergoing additional BS.
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Affiliation(s)
- Justin James
- Breast and Endocrine Unit, Maroondah Hospital, Eastern Health, Melbourne, Australia; Faculty of Medicine, Nursing, and Health Sciences, Monash University, Melbourne, Australia.
| | - Melanie Teo
- Breast and Endocrine Unit, Maroondah Hospital, Eastern Health, Melbourne, Australia
| | | | - Michael Law
- Breast and Endocrine Unit, Maroondah Hospital, Eastern Health, Melbourne, Australia
| | - Eugenia Ip
- Breast and Endocrine Unit, Maroondah Hospital, Eastern Health, Melbourne, Australia
| | - Michael Cheng
- Breast and Endocrine Unit, Maroondah Hospital, Eastern Health, Melbourne, Australia
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Hong A, Chua J, Cheng M, Law M. Breast cancer subtypes in Australian Chinese women. ANZ J Surg 2020; 90:2516-2520. [PMID: 32935473 DOI: 10.1111/ans.16313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 08/15/2020] [Accepted: 09/03/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND It has been suggested that Chinese patients with breast cancer present at a younger age compared to the general Australian population, with tumour pathological characteristics that carry less favourable outcomes. This study was aimed to investigate if a substantial difference in breast cancer subtypes exists between the Australian Chinese population and the general Australian population. METHODS All patients with breast cancer treated by two of the authors (consultant breast surgeons) at Eastern Health, Victoria between 2010 and 2016 were identified through the BreastSurgANZ Quality Audit database. Australian Chinese patients were further identified through outpatient records and registration information. Medical histories were examined to obtain patient demographics, tumour characteristics and outcome. Patient and tumour characteristics between the Australian Chinese population were then compared to the general Australian population. RESULTS A total of 97 Australian Chinese patients with breast cancer were identified out of 582 patients. Mean age at diagnosis was 56.7 years, approximately 6 years younger than the general Australian population. There was a statistically significant difference in incidence of Luminal A tumours with 25 patients (25.77%) from the Chinese group affected compared to 310 patients (63.92%) from the general group (P < 0.001). There was no significant difference in proportions of the other tumour subtypes between the two groups. CONCLUSION Australian Chinese breast cancer patients present at a younger age compared to the general Australian population, with a smaller proportion of patients having Luminal A tumours.
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Affiliation(s)
- Alton Hong
- Breast and Endocrine Surgery, Eastern Health, Melbourne, Victoria, Australia
| | - Jonathan Chua
- Breast and Endocrine Surgery, Eastern Health, Melbourne, Victoria, Australia
| | - Michael Cheng
- Breast and Endocrine Surgery, Eastern Health, Melbourne, Victoria, Australia
| | - Michael Law
- Breast and Endocrine Surgery, Eastern Health, Melbourne, Victoria, Australia
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Vajapeyam S, Brown D, Billups C, Patay Z, Vezina G, Shiroishi MS, Law M, Baxter P, Onar-Thomas A, Fangusaro JR, Dunkel IJ, Poussaint TY. Advanced ADC Histogram, Perfusion, and Permeability Metrics Show an Association with Survival and Pseudoprogression in Newly Diagnosed Diffuse Intrinsic Pontine Glioma: A Report from the Pediatric Brain Tumor Consortium. AJNR Am J Neuroradiol 2020; 41:718-724. [PMID: 32241771 DOI: 10.3174/ajnr.a6499] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2019] [Accepted: 02/10/2020] [Indexed: 12/23/2022]
Abstract
BACKGROUND AND PURPOSE Diffuse intrinsic pontine glioma is a lethal childhood brain cancer with dismal prognosis and MR imaging is the primary methodology used for diagnosis and monitoring. Our aim was to determine whether advanced diffusion, perfusion, and permeability MR imaging metrics predict survival and pseudoprogression in children with newly diagnosed diffuse intrinsic pontine glioma. MATERIALS AND METHODS A clinical trial using the poly (adenosine diphosphate ribose) polymerase (PARP) inhibitor veliparib concurrently with radiation therapy, followed by maintenance therapy with veliparib + temozolomide, in children with diffuse intrinsic pontine glioma was conducted by the Pediatric Brain Tumor Consortium. Standard MR imaging, DWI, dynamic contrast-enhanced perfusion, and DSC perfusion were performed at baseline and approximately every 2 months throughout treatment. ADC histogram metrics of T2-weighted FLAIR and enhancing tumor volume, dynamic contrast-enhanced permeability metrics for enhancing tumors, and tumor relative CBV from DSC perfusion MR imaging were calculated. Baseline values, post-radiation therapy changes, and longitudinal trends for all metrics were evaluated for associations with survival and pseudoprogression. RESULTS Fifty children were evaluable for survival analyses. Higher baseline relative CBV was associated with shorter progression-free survival (P = .02, Q = 0.089) and overall survival (P = .006, Q = 0.055). Associations of higher baseline mean transfer constant from the blood plasma into the extravascular extracellular space with shorter progression-free survival (P = .03, Q = 0.105) and overall survival (P = .03, Q = 0.102) trended toward significance. An increase in relative CBV with time was associated with shorter progression-free survival (P < .001, Q < 0.001) and overall survival (P = .004, Q = 0.043). Associations of longitudinal mean extravascular extracellular volume fraction with progression-free survival (P = .03, Q = 0.104) and overall survival (P = .03, Q = 0.105) and maximum transfer constant from the blood plasma into the extravascular extracellular space with progression-free survival (P = .03, Q = 0.102) trended toward significance. Greater increases with time were associated with worse outcomes. True radiologic progression showed greater post-radiation therapy decreases in mode_ADC_FLAIR compared with pseudoprogression (means, -268.15 versus -26.11, P = .01.) CONCLUSIONS: ADC histogram, perfusion, and permeability MR imaging metrics in diffuse intrinsic pontine glioma are useful in predicting survival and pseudoprogression.
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Affiliation(s)
- S Vajapeyam
- From the Radiology (S.V., T.Y.P.), Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts
| | - D Brown
- DF/HCC Tumor Imaging Metrics Core (D.B.), Massachusetts General Hospital, Boston, Massachusetts
| | | | - Z Patay
- Diagnostic Imaging (Z.P.), St. Jude Children's Research Hospital, Memphis, Tennessee
| | - G Vezina
- Radiology (G.V.), Children's National Medical Center, Washington, DC
| | - M S Shiroishi
- Radiology (M.S.S.), Keck Medical Center of USC, Los Angeles, California
| | - M Law
- Neuroscience (M.L.), Monash University, Melbourne, Australia
| | - P Baxter
- Cancer and Hematology Center (P.B.), Texas Children's Hospital, Houston, Texas
| | | | - J R Fangusaro
- Aflac Cancer and Blood Disorders Center (J.R.F.), Children's Healthcare of Atlanta, Atlanta, Georgia
| | - I J Dunkel
- Pediatrics (I.J.D.), Memorial Sloan Kettering Cancer Center, New York, New York
| | - T Y Poussaint
- From the Radiology (S.V., T.Y.P.), Boston Children's Hospital and Harvard Medical School, Boston, Massachusetts
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Goonawardena J, Yong C, Law M. P2 Is it time to switch to indocyanine green fluorescence for sentinel lymph node biopsy in early-stage breast cancer? Breast 2020. [DOI: 10.1016/j.breast.2020.01.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
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Goonawardena J, Yong C, Law M. Use of indocyanine green fluorescence compared to radioisotope for sentinel lymph node biopsy in early-stage breast cancer: systematic review and meta-analysis. Am J Surg 2020; 220:665-676. [PMID: 32115177 DOI: 10.1016/j.amjsurg.2020.02.001] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 01/12/2020] [Accepted: 02/03/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND In early-stage breast cancer, indocyanine green (ICG)-fluorescence based sentinel lymph node (SLN) detection is being considered. This is a meta-analysis of SLN detection rates and sensitivity of ICG-fluorescence compared to radioisotope (RI), to evaluate its clinical applicability. DATA SOURCES Systematic review of full-text articles from PubMed and Scopus, of women with early breast cancer who underwent SLN mapping using ICG and RI concurrently was performed. The meta-analysis was performed using the Mantel-Haenszel method. RESULTS 2301 patients from 19 studies were included. No significant difference was observed between ICG and RI for SLN detection (OR0.90,95%CI0.66-1.24) or sensitivity (OR1.23,95%CI0.73-2.05) with heterogeneity between studies (I2 = 58%,P = 0.003). Sensitivity of dual mapping (ICG + RI) was significantly better compared to single mapping with RI (OR3.69,95%CI1.79-7.62) or ICG (OR3.32,95%CI1.52-7.24) alone with no heterogeneity between studies (I2 = 0%,P = 0.004). CONCLUSION ICG-fluorescence could complement RI method or provide alternative in centers with poor accessibility to RI lymphoscintigraphy.
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Affiliation(s)
- Janindu Goonawardena
- Breast and Endocrine Surgery, Eastern Health, Box Hill, Victoria, 3128, Australia.
| | - Charles Yong
- Breast and Endocrine Surgery, Eastern Health, Box Hill, Victoria, 3128, Australia
| | - Michael Law
- Breast and Endocrine Surgery, Eastern Health, Box Hill, Victoria, 3128, Australia
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Elisofon SA, Magee JC, Ng VL, Horslen SP, Fioravanti V, Economides J, Erinjeri J, Anand R, Mazariegos GV, Martin A, Mannino D, Flynn L, Mohammad S, Alonso E, Superina R, Brandt K, Riordan M, Lokar J, Ito J, Elisofon S, Zapata L, Jain A, Foristal E, Gupta N, Whitlow C, Naik K, Espinosa H, Miethke A, Hawkins A, Hardy J, Engels E, Schreibeis A, Ovchinsky N, Kogan‐Liberman D, Cunningham R, Malik P, Sundaram S, Feldman A, Garcia B, Yanni G, Kohli R, Emamaullee J, Secules C, Magee J, Lopez J, Bilhartz J, Hollenbeck J, Shaw B, Bartow C, Forest S, Rand E, Byrne A, Linguiti I, Wann L, Seidman C, Mazariegos G, Soltys K, Squires J, Kepler A, Vitola B, Telega G, Lerret S, Desai D, Moghe J, Cutright L, Daniel J, Andrews W, Fioravanti V, Slowik V, Cisneros R, Faseler M, Hufferd M, Kelly B, Sudan D, Mavis A, Moats L, Swan‐Nesbit S, Yazigi N, Buranych A, Hobby A, Rao G, Maccaby B, Gopalareddy V, Boulware M, Ibrahim S, El Youssef M, Furuya K, Schatz A, Weckwerth J, Lovejoy C, Kasi N, Nadig S, Law M, Arnon R, Chu J, Bucuvalas J, Czurda M, Secheli B, Almy C, Haydel B, Lobritto S, Emand J, Biney‐Amissah E, Gamino D, Gomez A, Himes R, Seal J, Stewart S, Bergeron J, Truxillo A, Lebel S, Davidson H, Book L, Ramstack D, Riley A, Jennings C, Horslen S, Hsu E, Wallace K, Turmelle Y, Nadler M, Postma S, Miloh T, Economides J, Timmons K, Ng V, Subramonian A, Dharmaraj B, McDiarmid S, Feist S, Rhee S, Perito E, Gallagher L, Smith K, Ebel N, Zerofsky M, Nogueira J, Greer R, Gilmour S, Robert C, Cars C, Azzam R, Boone P, Garbarino N, Lalonde M, Kerkar N, Dokus K, Helbig K, Grizzanti M, Tomiyama K, Cocking J, Alexopoulos S, Bhave C, Schillo R, Bailey A, Dulek D, Ramsey L, Ekong U, Valentino P, Hettiarachchi D, Tomlin R. Society of pediatric liver transplantation: Current registry status 2011-2018. Pediatr Transplant 2020; 24:e13605. [PMID: 31680409 DOI: 10.1111/petr.13605] [Citation(s) in RCA: 62] [Impact Index Per Article: 15.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 08/08/2019] [Accepted: 09/27/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND SPLIT was founded in 1995 in order to collect comprehensive prospective data on pediatric liver transplantation, including waiting list data, transplant, and early and late outcomes. Since 2011, data collection of the current registry has been refined to focus on prospective data and outcomes only after transplant to serve as a foundation for the future development of targeted clinical studies. OBJECTIVE To report the outcomes of the SPLIT registry from 2011 to 2018. METHODS This is a multicenter, cross-sectional analysis characterizing patients transplanted and enrolled in the SPLIT registry between 2011 and 2018. All patients, <18 years of age, received a first liver-only, a combined liver-kidney, or a combined liver-pancreas transplant during this study period. RESULTS A total of 1911 recipients from 39 participating centers in North America were registered. Indications included biliary atresia (38.5%), metabolic disease (19.1%), tumors (11.7%), and fulminant liver failure (11.5%). Greater than 50% of recipients were transplanted as either Status 1A/1B or with a MELD/PELD exception score. Incompatible transplants were performed in 4.1%. Kaplan-Meier estimates of 1-year patient and graft survival were 97.3% and 96.6%. First 30 days of surgical complications included reoperation (31.7%), hepatic artery thrombosis (6.3%), and portal vein thrombosis (3.2%). In the first 90 days, biliary tract complications were reported in 13.6%. Acute cellular rejection during first year was 34.7%. At 1 and 2 years of follow-up, 39.2% and 50.6% had normal liver tests on monotherapy (tacrolimus or sirolimus). Further surgical, survival, allograft function, and complications are detailed.
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Affiliation(s)
- Scott A Elisofon
- Division of Gastroenterology, Hepatology and Nutrition, Boston Children's Hospital, Boston, Massachusetts
| | - John C Magee
- Division of Surgery, University of Michigan Transplant Center, Ann Arbor, Michigan
| | - Vicky L Ng
- Division of Pediatric Gastroenterology, Hepatology, and Nutrition, Transplant and Regenerative Medicine Center, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
| | - Simon P Horslen
- Department of Pediatrics, Seattle Children's Hospital, University of Washington School of Medicine, Seattle, Washington
| | - Vicki Fioravanti
- Section of Hepatology and Liver Transplantation, Children's Mercy Hospital, Kansas City, Missouri
| | | | | | | | - George V Mazariegos
- Division of Pediatric Transplant Surgery, Hillman Center for Pediatric Transplantation, UPMC Children's Hospital of Pittsburgh, Pittsburgh, PA, USA
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Situ Y, Baric J, Han W, Law M, Fatkin D, Graham R. 055 Prevalence and Patient Awareness of Cardiovascular Risk Factors in a Community-Based Australian Cohort. Heart Lung Circ 2020. [DOI: 10.1016/j.hlc.2020.09.062] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Rupasinghe D, Kiertiburanakul S, Kamarulzaman A, Zhang F, Kumarasamy N, Chaiwarith R, Merati TP, Do CD, Khusuwan S, Avihingsanon A, Lee MP, Ly PS, Yunihastuti E, Nguyen KV, Ditangco R, Chan YJ, Pujari S, Ng OT, Choi JY, Sim B, Tanuma J, Sangle S, Ross J, Law M. Early mortality after late initiation of antiretroviral therapy in the TREAT Asia HIV Observational Database (TAHOD) of the International Epidemiologic Databases to Evaluate AIDS (IeDEA) Asia-Pacific. HIV Med 2019; 21:397-402. [PMID: 31852025 DOI: 10.1111/hiv.12836] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/19/2019] [Indexed: 01/29/2023]
Abstract
OBJECTIVES Early mortality among those still initiating antiretroviral therapy (ART) with advanced stages of HIV infection in resource-limited settings remains high despite recommendations for universal HIV treatment. We investigated risk factors associated with early mortality in people living with HIV (PLHIV) starting ART at low CD4 levels in the Asia-Pacific. METHODS PLHIV enrolled in the Therapeutics, Research, Education and AIDS Training in Asia (TREAT Asia) HIV Observational Database (TAHOD) who initiated ART with a CD4 count < 100 cells/μL between 2003 and 2018 were included in the study. Early mortality was defined as death within 1 year of ART initiation. PLHIV in follow-up for > 1 year were censored at 12 months. Competing risk regression was used to analyse risk factors with loss to follow-up as a competing risk. RESULTS A total of 1813 PLHIV were included in the study, of whom 74% were male. With 73 (4%) deaths, the overall first-year mortality rate was 4.27 per 100 person-years (PY). Thirty-eight deaths (52%) were AIDS-related, 10 (14%) were immune reconstituted inflammatory syndrome (IRIS)-related, 13 (18%) were non-AIDS-related and 12 (16%) had an unknown cause. Risk factors included having a body mass index (BMI) < 18.5 [sub-hazard ratio (SHR) 2.91; 95% confidence interval (CI) 1.60-5.32] compared to BMI 18.5-24.9, and alanine aminotransferase (ALT) ≥ 5 times its upper limit of normal (ULN) (SHR 6.14; 95% CI 1.62-23.20) compared to ALT < 5 times its ULN. A higher CD4 count (51-100 cells/μL: SHR 0.28; 95% CI 0.14-0.55; and > 100 cells/μL: SHR 0.12; 95% CI 0.05-0.26) was associated with reduced hazard for mortality compared to CD4 count ≤ 25 cells/μL. CONCLUSIONS Fifty-two per cent of early deaths were AIDS-related. Efforts to initiate ART at CD4 counts > 50 cell/μL are associated with improved short-term survival rates, even in those with late stages of HIV disease.
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Affiliation(s)
- D Rupasinghe
- The Kirby Institute, UNSW Sydney, Sydney, NSW, Australia
| | - S Kiertiburanakul
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - A Kamarulzaman
- University Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - F Zhang
- Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - N Kumarasamy
- CART CRS, Voluntary Health Services, Chennai, India
| | - R Chaiwarith
- Research Institute for Health Sciences, Chiang Mai, Thailand
| | - T P Merati
- Faculty of Medicine Udayana University & Sanglah Hospital, Bali, Indonesia
| | - C D Do
- Bach Mai Hospital, Hanoi, Vietnam
| | - S Khusuwan
- Chiangrai Prachanukroh Hospital, Chiang Rai, Thailand
| | - A Avihingsanon
- HIV-NAT/Thai Red Cross AIDS Research Centre, Bangkok, Thailand
| | - M P Lee
- Queen Elizabeth Hospital, Hong Kong SAR, China
| | - P S Ly
- National Center for HIV/AIDS, Dermatology & STDs, Phnom Penh, Cambodia
| | - E Yunihastuti
- Faculty of Medicine Universitas Indonesia, Dr. Cipto Mangunkusumo General Hospital, Jakarta, Indonesia
| | - K V Nguyen
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - R Ditangco
- Research Institute for Tropical Medicine, Muntinlupa City, Philippines
| | - Y J Chan
- Taipei Veterans General Hospital, Taipei, Taiwan
| | - S Pujari
- Institute of Infectious Diseases, Pune, India
| | - O T Ng
- Tan Tock Seng Hospital, Singapore City, Singapore
| | - J Y Choi
- Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - Blh Sim
- Hospital Sungai Buloh, Sungai Buloh, Malaysia
| | - J Tanuma
- National Center for Global Health and Medicine, Tokyo, Japan
| | - S Sangle
- BJ Government Medical College and Sassoon General Hospitals, Pune, India
| | - J Ross
- TREAT Asia, amfAR-The Foundation for AIDS Research, Bangkok, Thailand
| | - M Law
- The Kirby Institute, UNSW Sydney, Sydney, NSW, Australia
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Polizzotto M, Van Bockel D, Law C, Roberts J, Buckland G, Just S, Comben S, Hillman R, Gilson R, Pett S, Poynten M, Law M, Kelleher A, Emery S. Clearance of HPV Anal Premalignant Lesions and Modulation of Systemic Immune Responses to HPV Oncogenes with Low Dose Pomalidomide. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz451.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Barisano G, Bigjahan B, Metting S, Cen S, Amezcua L, Lerner A, Toga AW, Law M. Signal Hyperintensity on Unenhanced T1-Weighted Brain and Cervical Spinal Cord MR Images after Multiple Doses of Linear Gadolinium-Based Contrast Agent. AJNR Am J Neuroradiol 2019; 40:1274-1281. [PMID: 31345942 DOI: 10.3174/ajnr.a6148] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 06/06/2019] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE The clinical implications of gadolinium deposition in the CNS are not fully understood, and it is still not known whether gadolinium tends to be retained more in the brain compared with the spinal cord. In this study, we assessed the effects of linear gadolinium-based contrast agents on the T1 signal intensity of 3 cerebral areas (dentate nucleus, globus pallidus, and the less studied substantia nigra) and the cervical spinal cord in a population of patients with MS. MATERIALS AND METHODS A single-center population of 100 patients with MS was analyzed. Patients underwent 2-16 contrast-enhanced MRIs. Fifty patients received ≤5 linear gadolinium injections, and 50 patients had ≥6 injections: Fifty-two patients had both Gd-DTPA and gadobenate dimeglumine injections, and 48 patients received only gadobenate dimeglumine. A quantitative analysis of signal intensity changes was independently performed by 2 readers on the first and last MR imaging scan. The globus pallidus-to-thalamus, substantia nigra-to-midbrain, dentate nucleus-to-middle cerebellar peduncle, and the cervical spinal cord-to-pons signal intensity ratios were calculated. RESULTS An increase of globus pallidus-to-thalamus (mean, +0.0251 ± 0.0432; P < .001), dentate nucleus-to-middle cerebellar peduncle (mean, +0.0266 ± 0.0841; P = .002), and substantia nigra-to-midbrain (mean, +0.0262 ± 0.0673; P < .001) signal intensity ratios after multiple administrations of linear gadolinium-based contrast agents was observed. These changes were significantly higher in patients who received ≥6 injections (P < .001) and positively correlated with the number of injections and the accumulated dose of contrast. No significant changes were detected in the spinal cord (mean, +0.0008 ± 0.0089; P = .400). CONCLUSIONS Patients with MS receiving ≥6 linear gadolinium-based contrast agent injections showed a significant increase in the signal intensity of the globus pallidus, dentate nucleus, and substantia nigra; no detectable changes were observed in the cervical spinal cord.
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Affiliation(s)
- G Barisano
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.) .,Stevens Neuroimaging and Informatics Institute (G.B., B.B., A.W.T., M.L.)
| | - B Bigjahan
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.).,Stevens Neuroimaging and Informatics Institute (G.B., B.B., A.W.T., M.L.)
| | - S Metting
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.)
| | - S Cen
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.)
| | - L Amezcua
- Department of Neurology (L.A.), Keck School of Medicine, University of Southern California, Los Angeles, California
| | - A Lerner
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.)
| | - A W Toga
- Stevens Neuroimaging and Informatics Institute (G.B., B.B., A.W.T., M.L.)
| | - M Law
- From the Department of Radiology (G.B., B.B., S.M., S.C., A.L., M.L.).,Stevens Neuroimaging and Informatics Institute (G.B., B.B., A.W.T., M.L.)
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Bijker R, Kumarasamy N, Kiertiburanakul S, Pujari S, Sun LP, Ng OT, Lee MP, Choi JY, Nguyen KV, Chan YJ, Merati TP, Do CD, Ross J, Law M. Diabetes, mortality and glucose monitoring rates in the TREAT Asia HIV Observational Database Low Intensity Transfer (TAHOD-LITE) study. HIV Med 2019; 20:615-623. [PMID: 31338975 DOI: 10.1111/hiv.12779] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/04/2019] [Indexed: 01/13/2023]
Abstract
OBJECTIVES Diabetes is a growing cause of morbidity and mortality in people living with HIV (PLHIV) receiving antiretroviral therapy (ART). We investigated the association between fasting plasma glucose (FPG) levels and mortality, and factors associated with FPG monitoring rates in Asia. METHODS Patients from the Therapeutics Research, Education, and AIDS Training in Asia (TREAT Asia) HIV Observational Database Low Intensity Transfer (TAHOD-LITE) cohort were included in the present study if they had initiated ART. Competing risk and Poisson regression were used to analyse the association between FPG and mortality, and assess risk factors for FPG monitoring rates, respectively. FPG was categorized as diabetes (FPG ≥ 7.0 mmol/L), prediabetes (FPG 5.6-6.9 mmol/L) and normal FPG (FPG < 5.6 mmol/L). RESULTS In total, 33 232 patients were included in the analysis. Throughout follow-up, 59% had no FPG test available. The incidence rate for diabetes was 13.7 per 1000 person-years in the 4649 patients with normal FPG at ART initiation. Prediabetes [sub-hazard ratio (sHR) 1.32; 95% confidence interval (CI) 1.07-1.64] and diabetes (sHR 1.90; 95% CI 1.52-2.38) were associated with mortality compared to those with normal FPG. FPG monitoring increased from 0.34 to 0.78 tests per person-year from 2012 to 2016 (P < 0.001). Male sex [incidence rate ratio (IRR) 1.08; 95% CI 1.03-1.12], age > 50 years (IRR 1.14; 95% CI 1.09-1.19) compared to ≤ 40 years, and CD4 count ≥ 500 cells/μL (IRR 1.04; 95% CI 1.00-1.09) compared to < 200 cells/μL were associated with increased FPG monitoring. CONCLUSIONS Diabetes and prediabetes were associated with mortality. FPG monitoring increased over time; however, less than half of our cohort had been tested. Greater resources should be allocated to FPG monitoring for early diabetic treatment and intervention and to optimize survival.
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Affiliation(s)
- R Bijker
- The Kirby Institute, University of New South Wales Sydney, Sydney, NSW, Australia
| | - N Kumarasamy
- Chennai Antiviral Research and Treatment Clinical Research Site (CART CRS), Voluntary Health Services-Infectious Diseases Medical Centre, Voluntary Health Services, Chennai, India
| | - S Kiertiburanakul
- Faculty of Medicine, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - S Pujari
- Institute of Infectious Diseases, Pune, India
| | - L Penh Sun
- National Center for HIV/AIDS, Dermatology & STDs, University of Health Sciences, Phnom Penh, Cambodia
| | - O T Ng
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore City, Singapore
| | - M P Lee
- Queen Elizabeth Hospital, Hong Kong
| | - J Y Choi
- Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, Korea
| | - K V Nguyen
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - Y J Chan
- Taipei Veterans General Hospital, Taipei, Taiwan
| | - T P Merati
- Faculty of Medicine Udayana University & Sanglah Hospital, Bali, Indonesia
| | - C D Do
- Bach Mai Hospital, Hanoi, Vietnam
| | - J Ross
- TREAT Asia, amfAR - The Foundation for AIDS Research, Bangkok, Thailand
| | - M Law
- The Kirby Institute, University of New South Wales Sydney, Sydney, NSW, Australia
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Rosman SL, Karangwa V, Law M, Monuteaux MC, Briscoe CD, McCall N. Provisional Validation of a Pediatric Early Warning Score for Resource-Limited Settings. Pediatrics 2019; 143:peds.2018-3657. [PMID: 30992308 DOI: 10.1542/peds.2018-3657] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 02/15/2019] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND AND OBJECTIVES The use of Pediatric Early Warning Scores is becoming widespread to identify and rapidly respond to patients with deteriorating conditions. The ability of Pediatric Early Warning Scores to identify children at high risk of deterioration or death has not, however, been established in resource-limited settings. METHODS We developed the Pediatric Early Warning Score for Resource-Limited Settings (PEWS-RL) on the basis of expert opinion and existing scores. The PEWS-RL was derived from 6 equally weighted variables, producing a cumulative score of 0 to 6. We then conducted a case-control study of admissions to the pediatrics department of the main public referral hospital in Kigali, Rwanda between November 2016 and March 2017. We defined case patients as children fulfilling the criteria for clinical deterioration, who were then matched with controls of the same age and hospital ward. RESULTS During the study period, 627 children were admitted, from whom we selected 79 case patients and 79 controls. For a PEWS-RL of ≥3, sensitivity was 96.2%, and specificity was 87.3% for identifying patients at risk for clinical deterioration. A total PEWS-RL of ≥3 was associated with a substantially increased risk of clinical deterioration (odds ratio 129.3; 95% confidence interval 38.8-431.6; P <.005). CONCLUSIONS This study reveals that the PEWS-RL, a simple score based on vital signs, mental status, and presence of respiratory distress, was feasible to implement in a resource-limited setting and was able to identify children at risk for clinical deterioration.
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Affiliation(s)
| | - Valens Karangwa
- Department of Pediatrics, University of Rwanda, Kigali, Rwanda
| | - Michael Law
- Center for Health Services and Policy Research, The University of British Columbia, Vancouver, Canada.,Department of Global Health and Social Medicine, Harvard Medical School, Harvard University, Boston, Massachusetts; and
| | | | | | - Natalie McCall
- Department of Pediatrics, School of Medicine, Yale University, New Haven, Connecticut
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Jiamsakul A, Kiertiburanakul S, Ng OT, Chaiwarith R, Wong W, Ditangco R, Nguyen KV, Avihingsanon A, Pujari S, Do CD, Lee MP, Ly PS, Yunihastuti E, Kumarasamy N, Kamarulzaman A, Tanuma J, Zhang F, Choi JY, Kantipong P, Sim B, Ross J, Law M, Merati TP. Long-term loss to follow-up in the TREAT Asia HIV Observational Database (TAHOD). HIV Med 2019; 20:439-449. [PMID: 30980495 DOI: 10.1111/hiv.12734] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/08/2019] [Indexed: 12/13/2022]
Abstract
OBJECTIVES With earlier antiretroviral therapy (ART) initiation, time spent in HIV care is expected to increase. We aimed to investigate loss to follow-up (LTFU) in Asian patients who remained in care 5 years after ART initiation. METHODS Long-term LTFU was defined as LTFU occurring after 5 years on ART. LTFU was defined as (1) patients not seen in the previous 12 months; and (2) patients not seen in the previous 6 months. Factors associated with LTFU were analysed using competing risk regression. RESULTS Under the 12-month definition, the LTFU rate was 2.0 per 100 person-years (PY) [95% confidence interval (CI) 1.8-2.2 among 4889 patients included in the study. LTFU was associated with age > 50 years [sub-hazard ratio (SHR) 1.64; 95% CI 1.17-2.31] compared with 31-40 years, viral load ≥ 1000 copies/mL (SHR 1.86; 95% CI 1.16-2.97) compared with viral load < 1000 copies/mL, and hepatitis C coinfection (SHR 1.48; 95% CI 1.06-2.05). LTFU was less likely to occur in females, in individuals with higher CD4 counts, in those with self-reported adherence ≥ 95%, and in those living in high-income countries. The 6-month LTFU definition produced an incidence rate of 3.2 per 100 PY (95% CI 2.9-3.4 and had similar associations but with greater risks of LTFU for ART initiation in later years (2006-2009: SHR 2.38; 95% CI 1.93-2.94; and 2010-2011: SHR 4.26; 95% CI 3.17-5.73) compared with 2003-2005. CONCLUSIONS The long-term LTFU rate in our cohort was low, with older age being associated with LTFU. The increased risk of LTFU with later years of ART initiation in the 6-month analysis, but not the 12-month analysis, implies that there was a possible move towards longer HIV clinic scheduling in Asia.
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Affiliation(s)
- A Jiamsakul
- The Kirby Institute, UNSW Sydney, Sydney, NSW, Australia
| | - S Kiertiburanakul
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - O T Ng
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore
| | - R Chaiwarith
- Research Institute for Health Sciences, Chiang Mai University, Chiang Mai, Thailand
| | - W Wong
- Taipei Veterans General Hospital, Taipei, Taiwan
| | - R Ditangco
- Research Institute for Tropical Medicine, Manila, Philippines
| | - K V Nguyen
- National Hospital for Tropical Diseases, Hanoi, Vietnam
| | - A Avihingsanon
- HIV-NAT, The Thai Red Cross AIDS Research Centre and Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - S Pujari
- Institute of Infectious Diseases, Pune, India
| | - C D Do
- Bach Mai Hospital, Hanoi, Vietnam
| | - M-P Lee
- Queen Elizabeth Hospital, Hong Kong, China
| | - P S Ly
- National Center for HIV/AIDS, Dermatology & STDs, University of Health Sciences, Phnom Penh, Cambodia
| | - E Yunihastuti
- Working Group on AIDS, Faculty of Medicine, University of Indonesia/Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - N Kumarasamy
- Chennai Antiviral Research and Treatment Clinical Research Site (CART CRS), The Voluntary Health Services (VHS), Chennai, India
| | - A Kamarulzaman
- University of Malaya Medical Centre, Kuala Lumpur, Malaysia
| | - J Tanuma
- National Center for Global Health and Medicine, Tokyo, Japan
| | - F Zhang
- Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - J Y Choi
- Division of Infectious Diseases, Department of Internal Medicine, Yonsei University College of Medicine, Seoul, South Korea
| | - P Kantipong
- Chiangrai Prachanukroh Hospital, Chiang Rai, Thailand
| | - Blh Sim
- Hospital Sungai Buloh, Sungai Buloh, Malaysia
| | - J Ross
- TREAT Asia, amfAR - The Foundation for AIDS Research, Bangkok, Thailand
| | - M Law
- The Kirby Institute, UNSW Sydney, Sydney, NSW, Australia
| | - T P Merati
- Faculty of Medicine, Udayana University & Sanglah Hospital, Bali, Indonesia
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Chao M, Spencer S, Kai C, Baker C, Jassal S, Law M, Cheng M, Zantuck N, Yu V, Stoney D, Loh S, Bevington E, Chew G, Hyett A, Guerrieri M, Ho H, Ng M, Wasiak J, Foroudi F. EP-1286 StrataXRT is non inferior to Mepitel Film in preventing radiation induced moist desquamation. Radiother Oncol 2019. [DOI: 10.1016/s0167-8140(19)31706-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Innes G, Mitchell* A, Weber B, Teichman J, Carlson K, McRae A, Law M, Scheuermeyer F, Grafstein E, Andruchow J. PD59-05 OUTCOMES OF MEDICAL VS INTERVENTIONAL MANAGEMENT FOR ACUTE URETERAL COLIC IN EMERGENCY DEPARTMENT PATIENTS. J Urol 2019. [DOI: 10.1097/01.ju.0000557217.76960.69] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Jiamsakul A, Lee MP, Nguyen KV, Merati TP, Cuong DD, Ditangco R, Yunihastuti E, Ponnampalavanar S, Zhang F, Kiertiburanakul S, Avihingasanon A, Ng OT, Sim BLH, Wong WW, Ross J, Law M. Socio-economic status and risk of tuberculosis: a case-control study of HIV-infected patients in Asia. Int J Tuberc Lung Dis 2019; 22:179-186. [PMID: 29506614 DOI: 10.5588/ijtld.17.0348] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING Tuberculosis (TB) is the most common human immunodeficiency virus (HIV) related opportunistic infection and cause of acquired immune-deficiency syndrome related death. TB often affects those from a low socio-economic background. OBJECTIVE To assess the socio-economic determinants of TB in HIV-infected patients in Asia. DESIGN This was a matched case-control study. HIV-positive, TB-positive cases were matched to HIV-positive, TB-negative controls according to age, sex and CD4 cell count. A socio-economic questionnaire comprising 23 questions, including education level, employment, housing and substance use, was distributed. Socio-economic risk factors for TB were analysed using conditional logistic regression analysis. RESULTS A total of 340 patients (170 matched pairs) were recruited, with 262 (77.1%) matched for all three criteria. Pulmonary TB was the predominant type (n = 115, 67.6%). The main risk factor for TB was not having a university level education (OR 4.45, 95%CI 1.50-13.17, P = 0.007). Burning wood or coal regularly inside the house and living in the same place of origin were weakly associated with TB diagnosis. CONCLUSIONS These data suggest that lower socio-economic status is associated with an increased risk of TB in Asia. Integrating clinical and socio-economic factors into HIV treatment may help in the prevention of opportunistic infections and disease progression.
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Affiliation(s)
- A Jiamsakul
- The Kirby Institute, University of New South Wales, Sydney, New South Wales, Australia
| | - M-P Lee
- Queen Elizabeth Hospital, Hong Kong, SAR China
| | - K V Nguyen
- National Hospital for Tropical Diseases, Hanoi, Viet Nam
| | - T P Merati
- Faculty of Medicine Udayana University & Sanglah Hospital, Bali, Indonesia
| | | | - R Ditangco
- Research Institute for Tropical Medicine, Manila, The Philippines
| | - E Yunihastuti
- Working Group on AIDS, Faculty of Medicine, University of Indonesia/Cipto Mangunkusumo Hospital, Jakarta, Indonesia
| | - S Ponnampalavanar
- Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - F Zhang
- Beijing Ditan Hospital, Capital Medical University, Beijing, China
| | - S Kiertiburanakul
- Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok
| | - A Avihingasanon
- HIV-Netherlands Australia Thailand Research Collaboration, The Thai Red Cross AIDS Research Centre and Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand
| | - O T Ng
- Department of Infectious Diseases, Tan Tock Seng Hospital, Singapore, Singapore
| | - B L H Sim
- Hospital Sungai Buloh, Sungai Buloh, Malaysia
| | - W-W Wong
- Taipei Veterans General Hospital, Taipei, Taiwan
| | - J Ross
- Therapeutics Research, Education, and AIDS Training in Asia, amfAR - The Foundation for AIDS Research, Bangkok, Thailand
| | - M Law
- The Kirby Institute, University of New South Wales, Sydney, New South Wales, Australia
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McKay R, Law M, McGrail K, Balshaw R, Reyes R, Patrick DM. What can we learn by examining variations in the use of urine culture in the management of acute cystitis? A retrospective cohort study with linked administrative data in British Columbia, Canada, 2005-2011. PLoS One 2019; 14:e0213534. [PMID: 30849104 PMCID: PMC6407775 DOI: 10.1371/journal.pone.0213534] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Accepted: 02/23/2019] [Indexed: 12/26/2022] Open
Abstract
Introduction Urinary tract infections (UTI) are common community-based bacterial infections. Empiric antibiotic recommendations are guided by local resistance rates. Previous research suggests that cultures are overused for uncomplicated cystitis, but practice patterns have not been described in detail. Variations in culturing have implications for the interpretation of antibiotic resistance rates. Methods We used a retrospective cohort study to analyze variations in urine culturing among physicians, controlling for patient and physician characteristics. We identified all outpatient physician visits among adults and children for cystitis in British Columbia between 2005 and 2011 using administrative data and linked these to laboratory data on urine cultures. Using hierarchical generalized linear mixed models we explored variations in urine culture submissions for cystitis (ICD code 595) and the associations with patient and physician characteristics, stratified by patient sex. Results Urine cultures were associated with 16% of visits for cystitis among females and 9% among males, and 59% of visits overall were associated with antibiotic treatment. Older patients, patients with a recent antibiotic prescription, and long term care residents were significantly less likely to have a culture associated with a cystitis visit, whether male or female. Female physicians and physicians with 16–35 years’ experience were more likely to culture, while international medical graduates were less likely–particularly for female visits. Notably, there was substantial unexplained variation among physicians after controlling for physician characteristics: we found a 24-fold variation in the odds of culturing a female UTI between physicians who were otherwise similar. Conclusion Individual physicians show substantial variation in their propensity to submit cultures for cystitis visits. Reducing such variation and encouraging appropriate levels of culturing would support effective antibiotic use.
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Affiliation(s)
- Rachel McKay
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, Canada
- * E-mail:
| | - Michael Law
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, Canada
| | - Kimberlyn McGrail
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
- Centre for Health Services and Policy Research, University of British Columbia, Vancouver, Canada
| | - Robert Balshaw
- George and Fay Yee Centre for Healthcare Innovation, University of Manitoba, Winnipeg, Canada
| | | | - David M. Patrick
- School of Population and Public Health, University of British Columbia, Vancouver, Canada
- British Columbia Centre for Disease Control, Vancouver, Canada
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James J, Teo M, Ramachandran V, Law M, Stoney D, Cheng M. A critical review of the chest CT scans performed to detect asymptomatic synchronous metastasis in new and recurrent breast cancers. World J Surg Oncol 2019; 17:40. [PMID: 30797241 PMCID: PMC6387737 DOI: 10.1186/s12957-019-1584-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2018] [Accepted: 02/15/2019] [Indexed: 11/10/2022] Open
Abstract
Background Chest computed tomography (CTC) has now replaced chest X-ray (CXR) as the first choice of investigation to stage breast cancers in most centers in Australia. Routine staging is not recommended in early breast cancers (EBCs). This recommendation is based largely on the use of conventional tests like CXR as staging investigations (SIs). We looked at our experience with CTC in detecting asymptomatic synchronous distant metastasis (ASM) in new and recurrent breast cancers (RBCs). Materials and methods Breast cancer patients from Eastern Health Breast Unit during the period from January 2012 to March 2016 were included in the study. Cases were grouped into early, advanced, and recurrent breast cancers, and outcome of CTC was assessed in each group. Relative risk of potential risk factors (tumor size, axillary nodal status, presence of lymphovascular invasion and estrogen, and HER2 receptor status) with a positive result in CTC was determined. Results Fourteen ASMs were detected from 335 CTCs giving an overall yield of 4% (95% CI 1.89–6.47). The overall false-positive rate was 10% due to 35 indeterminate findings that were found not to be metastases after further tests or observation. Even with selective use, CTCs have a low yield of 2% (95% CI − 0.19–4.19) in EBCs. Advanced breast cancers have a 9% incidence of ASMs. None of the clinically isolated locoregionally recurrent diseases were associated with detectable distant metastasis in CTC. The most common cause of indeterminate findings was small pulmonary nodules. Conclusion Even with selective use, CTC has a very low yield in EBCs. Advanced breast cancers can benefit from CTC in their initial evaluation due to the higher yield. Locoregional RBCs were not usually associated with detectable metastasis on CTC. The usefulness of CTC in all stages of breast cancer is further reduced by its high rate of false-positive results.
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Affiliation(s)
- Justin James
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia. .,Faculty of Medicine, Nursing and Health Sciences, Monash University, Melbourne, Australia.
| | - Melanie Teo
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia
| | - Vivekananda Ramachandran
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia
| | - Michael Law
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia
| | - David Stoney
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia
| | - Michael Cheng
- Breast and Endocrine Surgery Unit, Maroondah Hospital, Eastern Health, Davey Drive, Ringwood East, Melbourne, VIC, 3135, Australia
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Irimia A, Maher A, Chowdhury N, Rostowsky K, Law M. MULTIMODAL STUDY OF GERIATRIC MILD TRAUMATIC BRAIN INJURY USING COMPUTED TOMOGRAPHY AND MAGNETIC RESONANCE IMAGING. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1105] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- A Irimia
- University of Southern California
| | - A Maher
- University of Southern California
| | | | | | - M Law
- University of Southern California
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Hedden L, Barer ML, McGrail K, Law M, Bourgeault IL. In British Columbia, The Supply Of Primary Care Physicians Grew, But Their Rate Of Clinical Activity Declined. Health Aff (Millwood) 2018; 36:1904-1911. [PMID: 29137511 DOI: 10.1377/hlthaff.2017.0014] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Reports of a primary care shortage are ubiquitous in Canada and the United States. We used a population-based, retrospective cohort study to examine the extent to which the feminization and aging of the primary care physician workforce and secular trends may contribute to changes in the availability of primary care services. We used billing data for all primary care physicians in British Columbia for the period 2005-12. We used multivariate linear mixed-effects models to study physician remuneration and activity levels. We found limited change in per physician remuneration over the study period. However, numbers of patient contacts and practice sizes (numbers of unique patients) declined by 14 percent and 10 percent, respectively. Although the feminization of the workforce-and, to a lesser extent, its aging-contributed to this decline, the primary driver appears to be a broad trend toward reduced clinical activity over time. To the extent that similar trends are occurring in the United States, the implications of our study for the availability of primary care services beyond Canada are potentially significant.
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Affiliation(s)
- Lindsay Hedden
- Lindsay Hedden ( ) is a postdoctoral fellow in the Centre for Clinical Epidemiology and Evaluation, School of Population and Public Health, University of British Columbia, in Vancouver
| | - Morris L Barer
- Morris L. Barer is a professor in the Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia
| | - Kimberlyn McGrail
- Kimberlyn McGrail is an associate professor in the Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia
| | - Michael Law
- Michael Law is an associate professor in the Centre for Health Services and Policy Research, School of Population and Public Health, University of British Columbia
| | - Ivy L Bourgeault
- Ivy L. Bourgeault is a professor in the Telfer School of Management, University of Ottawa, in Ontario
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Gnatiuc L, Herrington WG, Halsey J, Tuomilehto J, Fang X, Kim HC, De Bacquer D, Dobson AJ, Criqui MH, Jacobs DR, Leon DA, Peters SAE, Ueshima H, Sherliker P, Peto R, Collins R, Huxley RR, Emberson JR, Woodward M, Lewington S, Aoki N, Arima H, Arnesen E, Aromaa A, Assmann G, Bachman DL, Baigent C, Bartholomew H, Benetos A, Bengtsson C, Bennett D, Björkelund C, Blackburn H, Bonaa K, Boyle E, Broadhurst R, Carstensen J, Chambless L, Chen Z, Chew SK, Clarke R, Cox C, Curb JD, D'Agostino R, Date C, Davey Smith G, De Backer G, Dhaliwal SS, Duan XF, Ducimetiere P, Duffy S, Eliassen H, Elwood P, Empana J, Garcia-Palmieri MH, Gazes P, Giles GG, Gillis C, Goldbourt U, Gu DF, Guasch-Ferre M, Guize L, Haheim L, Hart C, Hashimoto S, Hashimoto T, Heng D, Hjermann I, Ho SC, Hobbs M, Hole D, Holme I, Horibe H, Hozawa A, Hu F, Hughes K, Iida M, Imai K, Imai Y, Iso H, Jackson R, Jamrozik K, Jee SH, Jensen G, Jiang CQ, Johansen NB, Jorgensen T, Jousilahti P, Kagaya M, Keil J, Keller J, Kim IS, Kita Y, Kitamura A, Kiyohara Y, Knekt P, Knuiman M, Kornitzer M, Kromhout D, Kronmal R, Lam TH, Law M, Lee J, Leren P, Levy D, Li YH, Lissner L, Luepker R, Luszcz M, MacMahon S, Maegawa H, Marmot M, Matsutani Y, Meade T, Morris J, Morris R, Murayama T, Naito Y, Nakachi K, Nakamura M, Nakayama T, Neaton J, Nietert PJ, Nishimoto Y, Norton R, Nozaki A, Ohkubo T, Okayama A, Pan WH, Puska P, Qizilbash N, Reunanen A, Rimm E, Rodgers A, Saitoh S, Sakata K, Sato S, Schnohr P, Schulte H, Selmer R, Sharp D, Shifu X, Shimamoto K, Shipley M, Silbershatz H, Sorlie P, Sritara P, Suh I, Sutherland SE, Sweetnam P, Tamakoshi A, Tanaka H, Thomsen T, Tominaga S, Tomita M, Törnberg S, Tunstall-Pedoe H, Tverdal A, Ueshima H, Vartiainen E, Wald N, Wannamethee SG, Welborn TA, Whincup P, Whitlock G, Willett W, Woo J, Wu ZL, Yao SX, Yarnell J, Yokoyama T, Yoshiike N, Zhang XH. Sex-specific relevance of diabetes to occlusive vascular and other mortality: a collaborative meta-analysis of individual data from 980 793 adults from 68 prospective studies. Lancet Diabetes Endocrinol 2018; 6:538-546. [PMID: 29752194 PMCID: PMC6008496 DOI: 10.1016/s2213-8587(18)30079-2] [Citation(s) in RCA: 129] [Impact Index Per Article: 21.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Revised: 02/20/2018] [Accepted: 02/26/2018] [Indexed: 01/06/2023]
Abstract
BACKGROUND Several studies have shown that diabetes confers a higher relative risk of vascular mortality among women than among men, but whether this increased relative risk in women exists across age groups and within defined levels of other risk factors is uncertain. We aimed to determine whether differences in established risk factors, such as blood pressure, BMI, smoking, and cholesterol, explain the higher relative risks of vascular mortality among women than among men. METHODS In our meta-analysis, we obtained individual participant-level data from studies included in the Prospective Studies Collaboration and the Asia Pacific Cohort Studies Collaboration that had obtained baseline information on age, sex, diabetes, total cholesterol, blood pressure, tobacco use, height, and weight. Data on causes of death were obtained from medical death certificates. We used Cox regression models to assess the relevance of diabetes (any type) to occlusive vascular mortality (ischaemic heart disease, ischaemic stroke, or other atherosclerotic deaths) by age, sex, and other major vascular risk factors, and to assess whether the associations of blood pressure, total cholesterol, and body-mass index (BMI) to occlusive vascular mortality are modified by diabetes. RESULTS Individual participant-level data were analysed from 980 793 adults. During 9·8 million person-years of follow-up, among participants aged between 35 and 89 years, 19 686 (25·6%) of 76 965 deaths were attributed to occlusive vascular disease. After controlling for major vascular risk factors, diabetes roughly doubled occlusive vascular mortality risk among men (death rate ratio [RR] 2·10, 95% CI 1·97-2·24) and tripled risk among women (3·00, 2·71-3·33; χ2 test for heterogeneity p<0·0001). For both sexes combined, the occlusive vascular death RRs were higher in younger individuals (aged 35-59 years: 2·60, 2·30-2·94) than in older individuals (aged 70-89 years: 2·01, 1·85-2·19; p=0·0001 for trend across age groups), and, across age groups, the death RRs were higher among women than among men. Therefore, women aged 35-59 years had the highest death RR across all age and sex groups (5·55, 4·15-7·44). However, since underlying confounder-adjusted occlusive vascular mortality rates at any age were higher in men than in women, the adjusted absolute excess occlusive vascular mortality associated with diabetes was similar for men and women. At ages 35-59 years, the excess absolute risk was 0·05% (95% CI 0·03-0·07) per year in women compared with 0·08% (0·05-0·10) per year in men; the corresponding excess at ages 70-89 years was 1·08% (0·84-1·32) per year in women and 0·91% (0·77-1·05) per year in men. Total cholesterol, blood pressure, and BMI each showed continuous log-linear associations with occlusive vascular mortality that were similar among individuals with and without diabetes across both sexes. INTERPRETATION Independent of other major vascular risk factors, diabetes substantially increased vascular risk in both men and women. Lifestyle changes to reduce smoking and obesity and use of cost-effective drugs that target major vascular risks (eg, statins and antihypertensive drugs) are important in both men and women with diabetes, but might not reduce the relative excess risk of occlusive vascular disease in women with diabetes, which remains unexplained. FUNDING UK Medical Research Council, British Heart Foundation, Cancer Research UK, European Union BIOMED programme, and National Institute on Aging (US National Institutes of Health).
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