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Tricco AC, Parker A, Khan PA, Nincic V, Robson R, MacDonald H, Warren R, Cleary O, Zibrowski E, Baxter N, Burns KEA, Coyle D, Ndjaboue R, Clark JP, Langlois EV, Ahmed SB, Witteman HO, Graham ID, El-Adhami W, Skidmore B, Légaré F, Curran J, Hawker G, Watt J, Bourgeault IL, Leigh JP, Lawford K, Aiken A, McCabe C, Shepperd S, Pattani R, Leon N, Lundine J, Adisso ÉL, Ono S, Rabeneck L, Straus SE. Interventions on gender equity in the workplace: a scoping review. BMC Med 2024; 22:149. [PMID: 38581003 PMCID: PMC10998304 DOI: 10.1186/s12916-024-03346-7] [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: 08/28/2023] [Accepted: 03/07/2024] [Indexed: 04/07/2024] Open
Abstract
BACKGROUND Various studies have demonstrated gender disparities in workplace settings and the need for further intervention. This study identifies and examines evidence from randomized controlled trials (RCTs) on interventions examining gender equity in workplace or volunteer settings. An additional aim was to determine whether interventions considered intersection of gender and other variables, including PROGRESS-Plus equity variables (e.g., race/ethnicity). METHODS Scoping review conducted using the JBI guide. Literature was searched in MEDLINE, Embase, PsycINFO, CINAHL, Web of Science, ERIC, Index to Legal Periodicals and Books, PAIS Index, Policy Index File, and the Canadian Business & Current Affairs Database from inception to May 9, 2022, with an updated search on October 17, 2022. Results were reported using Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension to scoping reviews (PRISMA-ScR), Sex and Gender Equity in Research (SAGER) guidance, Strengthening the Integration of Intersectionality Theory in Health Inequality Analysis (SIITHIA) checklist, and Guidance for Reporting Involvement of Patients and the Public (GRIPP) version 2 checklist. All employment or volunteer sectors settings were included. Included interventions were designed to promote workplace gender equity that targeted: (a) individuals, (b) organizations, or (c) systems. Any comparator was eligible. Outcomes measures included any gender equity related outcome, whether it was measuring intervention effectiveness (as defined by included studies) or implementation. Data analyses were descriptive in nature. As recommended in the JBI guide to scoping reviews, only high-level content analysis was conducted to categorize the interventions, which were reported using a previously published framework. RESULTS We screened 8855 citations, 803 grey literature sources, and 663 full-text articles, resulting in 24 unique RCTs and one companion report that met inclusion criteria. Most studies (91.7%) failed to report how they established sex or gender. Twenty-three of 24 (95.8%) studies reported at least one PROGRESS-Plus variable: typically sex or gender or occupation. Two RCTs (8.3%) identified a non-binary gender identity. None of the RCTs reported on relationships between gender and other characteristics (e.g., disability, age, etc.). We identified 24 gender equity promoting interventions in the workplace that were evaluated and categorized into one or more of the following themes: (i) quantifying gender impacts; (ii) behavioural or systemic changes; (iii) career flexibility; (iv) increased visibility, recognition, and representation; (v) creating opportunities for development, mentorship, and sponsorship; and (vi) financial support. Of these interventions, 20/24 (83.3%) had positive conclusion statements for their primary outcomes (e.g., improved academic productivity, increased self-esteem) across heterogeneous outcomes. CONCLUSIONS There is a paucity of literature on interventions to promote workplace gender equity. While some interventions elicited positive conclusions across a variety of outcomes, standardized outcome measures considering specific contexts and cultures are required. Few PROGRESS-Plus items were reported. Non-binary gender identities and issues related to intersectionality were not adequately considered. Future research should provide consistent and contemporary definitions of gender and sex. TRIAL REGISTRATION Open Science Framework https://osf.io/x8yae .
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Affiliation(s)
- Andrea C Tricco
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada.
| | - Amanda Parker
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Paul A Khan
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Vera Nincic
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Reid Robson
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Heather MacDonald
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Rachel Warren
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | - Olga Cleary
- Centre for Health Policy and Management, School of Medicine, Trinity College Dublin, Dublin, Ireland
| | | | - Nancy Baxter
- Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Victoria, Australia
| | - Karen E A Burns
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
| | - Doug Coyle
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Canada
| | - Ruth Ndjaboue
- École de Travail Social, Université de Sherbrooke, Québec, (Québec), Canada
| | - Jocalyn P Clark
- Department of Medicine, University of Toronto, Toronto, Canada
| | - Etienne V Langlois
- Partnership for Maternal, Newborn and Child Health (PMNCH), World Health Organization (WHO), Geneva, Switzerland
| | - Sofia B Ahmed
- Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Holly O Witteman
- Department of Family and Emergency Medicine, Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Ian D Graham
- Centre for Implementation Research, Ottawa Hospital Research Institute, Ottawa, Canada
| | - Wafa El-Adhami
- Science in Australia Gender Equity Limited, Greenway, Australia
| | | | - France Légaré
- Department of Family and Emergency Medicine, Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Janet Curran
- School of Nursing, Faculty of Health, Dalhousie University, Halifax, Canada
| | - Gillian Hawker
- Division of Rheumatology, Department of Medicine, University of Toronto, Toronto, Canada
| | - Jennifer Watt
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
| | | | - Jeanna Parsons Leigh
- School of Health Administration, Faculty of Health, Dalhousie University, Halifax, Canada
| | - Karen Lawford
- Department of Gender Studies, Haudenosaunee and Anishinaabek Territories, Queen's University, Settlement of Kingston, Canada
| | - Alice Aiken
- Research and Innovation, Dalhousie University, Halifax, Canada
| | | | - Sasha Shepperd
- Nuffield Department of Population Health, University of Oxford, Richard Doll Building, Old Road Campus, Oxford, UK
| | - Reena Pattani
- Department of Medicine, Division of Internal Medicine, St Michael's Hospital, Unity Health Toronto, Toronto, Canada
| | - Natalie Leon
- Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | | | - Évèhouénou Lionel Adisso
- Department of Social and Preventive Medicine, Faculty of Medicine, Université Laval, Quebec City, Canada
| | - Santa Ono
- Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Linda Rabeneck
- Dalla Lana School of Public Health, University of Toronto, Toronto, Canada
| | - Sharon E Straus
- Li Ka Shing Knowledge Institute, St. Michael's Hospital, Unity Health Toronto, 209 Victoria Street, 7th Floor, East Building, Toronto, ON, M5B 1T8, Canada
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Tricco AC, Nincic V, Darvesh N, Rios P, Khan PA, Ghassemi MM, MacDonald H, Yazdi F, Lai Y, Warren R, Austin A, Cleary O, Baxter NN, Burns KEA, Coyle D, Curran JA, Graham ID, Hawker G, Légaré F, Watt J, Witteman HO, Clark JP, Bourgeault IL, Parsons Leigh J, Ahmed SB, Lawford K, Aiken AB, Langlois EV, McCabe C, Shepperd S, Skidmore B, Pattani R, Leon N, Lundine J, Adisso ÉL, El-Adhami W, Straus SE. Global evidence of gender equity in academic health research: a scoping review. BMJ Open 2023; 13:e067771. [PMID: 36792322 PMCID: PMC9933760 DOI: 10.1136/bmjopen-2022-067771] [Citation(s) in RCA: 1] [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] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
OBJECTIVES To chart the global literature on gender equity in academic health research. DESIGN Scoping review. PARTICIPANTS Quantitative studies were eligible if they examined gender equity within academic institutions including health researchers. PRIMARY AND SECONDARY OUTCOME MEASURES Outcomes related to equity across gender and other social identities in academia: (1) faculty workforce: representation of all genders in university/faculty departments, academic rank or position and salary; (2) service: teaching obligations and administrative/non-teaching activities; (3) recruitment and hiring data: number of applicants by gender, interviews and new hires for various rank; (4) promotion: opportunities for promotion and time to progress through academic ranks; (5) academic leadership: type of leadership positions, opportunities for leadership promotion or training, opportunities to supervise/mentor and support for leadership bids; (6) scholarly output or productivity: number/type of publications and presentations, position of authorship, number/value of grants or awards and intellectual property ownership; (7) contextual factors of universities; (8) infrastructure; (9) knowledge and technology translation activities; (10) availability of maternity/paternity/parental/family leave; (11) collaboration activities/opportunities for collaboration; (12) qualitative considerations: perceptions around promotion, finances and support. RESULTS Literature search yielded 94 798 citations; 4753 full-text articles were screened, and 562 studies were included. Most studies originated from North America (462/562, 82.2%). Few studies (27/562, 4.8%) reported race and fewer reported sex/gender (which were used interchangeably in most studies) other than male/female (11/562, 2.0%). Only one study provided data on religion. No other PROGRESS-PLUS variables were reported. A total of 2996 outcomes were reported, with most studies examining academic output (371/562, 66.0%). CONCLUSIONS Reviewed literature suggest a lack in analytic approaches that consider genders beyond the binary categories of man and woman, additional social identities (race, religion, social capital and disability) and an intersectionality lens examining the interconnection of multiple social identities in understanding discrimination and disadvantage. All of these are necessary to tailor strategies that promote gender equity. TRIAL REGISTRATION NUMBER Open Science Framework: https://osf.io/8wk7e/.
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Affiliation(s)
- Andrea C Tricco
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Epidemiology Division and Institute for Health Policy, Management, and Evaluation, University of Toronto Dalla Lana School of Public Health, Toronto, Ontario, Canada
- Queen's Collaboration for Health Care Quality Joanna Briggs Institute Centre of Excellence, Queen's University, Kingston, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Vera Nincic
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Nazia Darvesh
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | | | - Paul A Khan
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Marco M Ghassemi
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Heather MacDonald
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Fatemeh Yazdi
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Yonda Lai
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Rachel Warren
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Alyssa Austin
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
| | - Olga Cleary
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Centre for Health Policy and Management, Trinity College Dublin, Dublin, Ireland
| | - Nancy N Baxter
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Melbourne School of Population and Global Health, University of Melbourne, Victoria, Melbourne, Australia
| | - Karen E A Burns
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Ontario, Canada
- HEI, McMaster University, Hamilton, Ontario, Canada
| | - Douglas Coyle
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
| | - Janet A Curran
- Department of Nursing, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Ian D Graham
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, Ontario, Canada
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Gillian Hawker
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
- Division of Rheumatology, Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - France Légaré
- Vitam Research Centre in Sustainable Health, Quebec City, Quebec, Canada
- Department of Family and Emergency Medicine, Faculty of Medicine, Universite Laval, Quebec, Quebec, Canada
| | - Jennifer Watt
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Division of Geriatric Medicine, University of Toronto, Toronto, Ontario, Canada
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Holly O Witteman
- Vitam Research Centre in Sustainable Health, Quebec City, Quebec, Canada
- Department of Family and Emergency Medicine, Faculty of Medicine, Universite Laval, Quebec, Quebec, Canada
- Office of Education and Professional Development, Université Laval, Quebec City, Québec, Canada
| | - Jocalyn P Clark
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- The Lancet Ltd, London, London, UK
| | | | - Jeanna Parsons Leigh
- School of Health Administration, Faculty of Health, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Sofia B Ahmed
- Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Karen Lawford
- Department of Gender Studies, Queen's University, Haudenosaunee and Anishinaabek Territories, Settlement of Kingston, Ontario, Canada
| | - Alice B Aiken
- Department of Research and Innovation, Dalhousie University, Halifax, Nova Scotia, Canada
- School of Physiotherapy, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Etienne V Langlois
- Partnership for Maternal, Newborn and Child Health (PMNCH), WHO, Geneve, Switzerland
| | - Christopher McCabe
- Institute of Health Economics, Edmonton, Alberta, Canada
- Department of Emergency Medicine, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Sasha Shepperd
- Nuffield Department of Population Health, University of Oxford, Oxford, UK
| | - Becky Skidmore
- Independent Information Specialist, Ottawa, Ontario, Canada
| | - Reena Pattani
- Department of Medicine, University of Toronto, Toronto, Ontario, Canada
- Division of Internal Medicine, Department of Medicine, St Michael's Hospital, Unity Health Toronto, Toronto, Ontario, Canada
| | - Natalie Leon
- Health Systems Research Unit, South African Medical Research Council, Tygerberg, South Africa
- Department of Epidemiology, School of Public Health, Brown University, Providence, Rhode Island, USA
| | | | - Évèhouénou Lionel Adisso
- Department of Social and Preventive Medicine, Faculty of Medicine, Universite Laval, Quebec City, Quebec, Canada
| | - Wafa El-Adhami
- Science in Australia Gender Equity Limited, Canberra, ACT, Australia
| | - Sharon E Straus
- Knowledge Translation Program, Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario, Canada
- Division of Geriatric Medicine, University of Toronto, Toronto, Ontario, Canada
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3
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Tricco AC, Lachance CC, Rios P, Darvesh N, Antony J, Radhakrishnan A, Anand SS, Baxter N, Burns KEA, Coyle D, Curran JA, Fiest K, Graham ID, Hawker G, Légaré F, Watt J, Witteman HO, Clark JP, Bourgeault IL, Leigh JP, Ahmed SB, Lawford K, Aiken A, Falk-Krzesinski HJ, Langlois EV, McCabe C, Shepperd S, Skidmore B, Pattani R, Leon N, Lundine J, Adisso L, El-Adhami W, Straus SE. Global evidence of gender inequity in academic health research: a living scoping review protocol. JBI Evid Synth 2021; 18:2181-2193. [PMID: 32925395 DOI: 10.11124/jbies-20-00078] [Citation(s) in RCA: 7] [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] [Indexed: 12/23/2022]
Abstract
OBJECTIVE The objective of this review is to describe the global evidence of gender inequity among individuals with appointments at academic institutions that conduct health research, and examine how gender intersects with other social identities to influence outcomes. INTRODUCTION The gender demographics of universities have shifted, yet the characteristics of those who lead academic health research institutions have not reflected this change. Synthesized evidence will guide decision-making and policy development to support the progress of gender and other under-represented social identities in academia. INCLUSION CRITERIA This review will consider any quantitative, qualitative, or mixed methods primary research that reports outcome data related to gender equity and other social identities among individuals affiliated with academic or research institutions that conduct health research, originating from any country. METHODS The JBI Manual for Evidence Synthesis and the Cochrane Collaboration's guidance on living reviews will inform the review methods. Information sources will include electronic databases, unpublished literature sources, reference scanning of relevant systematic reviews, and sources provided by experts on the research team. Searches will be run regularly to monitor the development of new literature and determine when the review will be updated. Study selection and data extraction will be conducted by two reviewers working independently, and all discrepancies will be resolved by discussion or a third reviewer. Data synthesis will summarize information using descriptive frequencies and simple thematic analysis. Results will be reported using the Preferred Reporting Items for Systematic Reviews and Meta-Analysis extension to scoping reviews. REGISTRATION Open Science Framework: https://osf.io/8wk7e/.
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Affiliation(s)
- Andrea C Tricco
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada.,Epidemiology Division, Dalla Lana School of Public Health, University of Toronto, Toronto, ON, Canada.,Queen's Collaboration for Health Care Quality: A JBI Centre of Excellence, Kingston, ON, Canada
| | | | - Patricia Rios
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Nazia Darvesh
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Jesmin Antony
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Amruta Radhakrishnan
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Sonia S Anand
- Division of Cardiology, Department of Medicine, Faculty of Health Sciences, McMaster University, Hamilton, ON, Canada
| | - Nancy Baxter
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada.,Department of Surgery, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Karen E A Burns
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada.,Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, ON, Canada
| | - Doug Coyle
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Janet A Curran
- School of Nursing, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Kirsten Fiest
- Critical Care Medicine, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Ian D Graham
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Gillian Hawker
- Division of Rheumatology, Department of Medicine, University of Toronto, Toronto, ON, Canada
| | - France Légaré
- Department of Family and Emergency Medicine, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Jennifer Watt
- Division of Geriatric Medicine, University of Toronto, Toronto, ON, Canada
| | - Holly O Witteman
- Department of Family and Emergency Medicine, Faculty of Medicine, Université Laval, Quebec City, QC, Canada.,Office of Education and Professional Development, Université Laval, Quebec City, QC, Canada
| | - Jocalyn P Clark
- Department of Medicine, University of Toronto, Toronto, ON, Canada.,The Lancet, London, ON, United Kingdom
| | | | - Jeanna Parsons Leigh
- School of Health Administration, Faculty of Health, Dalhousie University, Halifax, NS, Canada
| | - Sofia B Ahmed
- Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Karen Lawford
- Department of Gender Studies, Queen's University, Haudenosaunee and Anishinaabek Territories, Settlement of Kingston, ON, Canada
| | - Alice Aiken
- Research and Innovation, Dalhousie University, Halifax, NS, Canada
| | - Holly J Falk-Krzesinski
- Global Strategic Networks, Elsevier Incorporated, New York City, NY, USA.,School of Professional Studies, Northwestern University, Chicago, IL, USA
| | - Etienne V Langlois
- Partnership for Maternal, Newborn and Child Health, World Health Organization, Geneva, Switzerland
| | - Chris McCabe
- Institute of Health Economics, Edmonton, AB, Canada
| | - Sasha Shepperd
- Nuffield Department of Population Health, University of Oxford, Oxford, United Kingdom
| | | | - Reena Pattani
- Department of Medicine, University of Toronto, Toronto, ON, Canada.,Division of Internal Medicine, Department of Medicine, St Michael's Hospital, Unity Health Toronto, Toronto, ON, Canada
| | - Natalie Leon
- Health Systems Research Unit, South African Medical Research Council, Cape Town, South Africa
| | | | - Lionel Adisso
- Department of Social and Preventive Medicine, Faculty of Medicine, Université Laval, Quebec City, QC, Canada
| | - Wafa El-Adhami
- Science in Australia Gender Equity, Acton, ACT, Australia
| | - Sharon E Straus
- Li Ka Shing Knowledge Institute, St. Michael 's Hospital, Unity Health Toronto, Toronto, ON, Canada.,Department of Medicine, University of Toronto, Toronto, ON, Canada
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Tugwell P, Welch VA, Karunananthan S, Maxwell LJ, Akl EA, Avey MT, Bhutta ZA, Brouwers MC, Clark JP, Cook S, Cuervo LG, Curran JA, Ghogomu ET, Graham IG, Grimshaw JM, Hutton B, Ioannidis JPA, Jordan Z, Jull JE, Kristjansson E, Langlois EV, Little J, Lyddiatt A, Martin JE, Marušić A, Mbuagbaw L, Moher D, Morton RL, Nasser M, Page MJ, Pardo Pardo J, Petkovic J, Petticrew M, Pigott T, Pottie K, Rada G, Rader T, Riddle AY, Rothstein H, Schüneman HJ, Shamseer L, Shea BJ, Simeon R, Siontis KC, Smith M, Soares-Weiser K, Thavorn K, Tovey D, Vachon B, Valentine J, Villemaire R, Walker P, Weeks L, Wells G, Wilson DB, White H. When to replicate systematic reviews of interventions: consensus checklist. BMJ 2020. [PMID: 32933948 DOI: 10.1136/bmj.n.71] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Peter Tugwell
- Department of Medicine, University of Ottawa, 501 Smyth Road, Room L1227, Ottawa, ON, K1H 8L6, Canada .,Bruyere Research Institute, Ottawa, ON, Canada.,Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Vivian Andrea Welch
- Bruyere Research Institute, Ottawa, ON, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Sathya Karunananthan
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Lara J Maxwell
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Elie A Akl
- Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
| | - Marc T Avey
- Public Health Agency of Canada, Ottawa, ON, Canada
| | | | - Melissa C Brouwers
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Jocalyn P Clark
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | | | - Luis Gabriel Cuervo
- Pan American Health Organization (PAHO/WHO), Unit of Health Services and Access, Washington, DC, USA
| | | | | | - Ian G Graham
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Jeremy M Grimshaw
- Department of Medicine, University of Ottawa, 501 Smyth Road, Room L1227, Ottawa, ON, K1H 8L6, Canada.,Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Brian Hutton
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - John P A Ioannidis
- Stanford Prevention Research Center, Department of Medicine and Department of Epidemiology and Population Health, Stanford University, Stanford, CA, USA
| | - Zoe Jordan
- JBI, Faculty of Health and Medical Sciences, University of Adelaide, South Australia
| | | | - Elizabeth Kristjansson
- Centre for Research in Educational and Community Services, School of Psychology, Faculty of Social Sciences, Ottawa, ON, Canada
| | - Etienne V Langlois
- World Health Organization, Partnership for Maternal, Newborn, and Child Health (PMNCH), Geneva, Switzerland
| | - Julian Little
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | | | - Janet E Martin
- Department of Anesthesia and Perioperative Medicine, and Department of Epidemiology and Biostatistics, Western University, London, ON, Canada
| | - Ana Marušić
- Department of Research in Biomedicine and Health, University of Split School of Medicine, Split, Croatia
| | - Lawrence Mbuagbaw
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada
| | - David Moher
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Rachael L Morton
- NHMRC Clinical Trials Centre, University of Sydney, Sydney, NSW, Australia
| | - Mona Nasser
- Faculty of Health, University of Plymouth, UK
| | - Matthew J Page
- School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - Jordi Pardo Pardo
- Cochrane Musculoskeletal Group, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | | | - Mark Petticrew
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Terri Pigott
- College of Education and Human Development, Georgia State University, Atlanta, GA, USA
| | - Kevin Pottie
- Department of Family Medicine, University of Ottawa, Ottawa, ON, Canada
| | | | - Tamara Rader
- Canadian Agency for Drugs and Technologies in Health, Ottawa, ON, Canada
| | | | - Hannah Rothstein
- Narendra Paul Loomba Department of Management, Baruch College, New York, NY, USA
| | - Holger J Schüneman
- Cochrane Canada and McMaster GRADE Centres, Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Larissa Shamseer
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Beverley J Shea
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Rosiane Simeon
- Population Health, Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | | | | | | | - Kednapa Thavorn
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada.,School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | | | - Brigitte Vachon
- School of Rehabilitation, Faculty of Medicine, Université de Montréal, Montreal, Canada
| | | | - Rebecca Villemaire
- Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, Canada
| | | | - Laura Weeks
- Canadian Agency for Drugs and Technologies in Health, Ottawa, ON, Canada
| | - George Wells
- Cardiovascular Research Methods Centre, University of Ottawa Heart Institute, Ottawa, ON, Canada
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5
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Tugwell P, Welch VA, Karunananthan S, Maxwell LJ, Akl EA, Avey MT, Bhutta ZA, Brouwers MC, Clark JP, Cook S, Cuervo LG, Curran JA, Ghogomu ET, Graham IG, Grimshaw JM, Hutton B, Ioannidis JPA, Jordan Z, Jull JE, Kristjansson E, Langlois EV, Little J, Lyddiatt A, Martin JE, Marušić A, Mbuagbaw L, Moher D, Morton RL, Nasser M, Page MJ, Pardo Pardo J, Petkovic J, Petticrew M, Pigott T, Pottie K, Rada G, Rader T, Riddle AY, Rothstein H, Schüneman HJ, Shamseer L, Shea BJ, Simeon R, Siontis KC, Smith M, Soares-Weiser K, Thavorn K, Tovey D, Vachon B, Valentine J, Villemaire R, Walker P, Weeks L, Wells G, Wilson DB, White H. When to replicate systematic reviews of interventions: consensus checklist. BMJ 2020; 370:m2864. [PMID: 32933948 DOI: 10.1136/bmj.m2864] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Peter Tugwell
- Department of Medicine, University of Ottawa, 501 Smyth Road, Room L1227, Ottawa, ON, K1H 8L6, Canada
- Bruyere Research Institute, Ottawa, ON, Canada
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Vivian Andrea Welch
- Bruyere Research Institute, Ottawa, ON, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Sathya Karunananthan
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Lara J Maxwell
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Elie A Akl
- Department of Internal Medicine, American University of Beirut, Beirut, Lebanon
| | - Marc T Avey
- Public Health Agency of Canada, Ottawa, ON, Canada
| | | | - Melissa C Brouwers
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Jocalyn P Clark
- Department of Medicine, University of Toronto, Toronto, ON, Canada
| | | | - Luis Gabriel Cuervo
- Pan American Health Organization (PAHO/WHO), Unit of Health Services and Access, Washington, DC, USA
| | | | | | - Ian G Graham
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Jeremy M Grimshaw
- Department of Medicine, University of Ottawa, 501 Smyth Road, Room L1227, Ottawa, ON, K1H 8L6, Canada
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Brian Hutton
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - John P A Ioannidis
- Stanford Prevention Research Center, Department of Medicine and Department of Epidemiology and Population Health, Stanford University, Stanford, CA, USA
| | - Zoe Jordan
- JBI, Faculty of Health and Medical Sciences, University of Adelaide, South Australia
| | | | - Elizabeth Kristjansson
- Centre for Research in Educational and Community Services, School of Psychology, Faculty of Social Sciences, Ottawa, ON, Canada
| | - Etienne V Langlois
- World Health Organization, Partnership for Maternal, Newborn, and Child Health (PMNCH), Geneva, Switzerland
| | - Julian Little
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | | | - Janet E Martin
- Department of Anesthesia and Perioperative Medicine, and Department of Epidemiology and Biostatistics, Western University, London, ON, Canada
| | - Ana Marušić
- Department of Research in Biomedicine and Health, University of Split School of Medicine, Split, Croatia
| | - Lawrence Mbuagbaw
- Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, ON, Canada
| | - David Moher
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | - Rachael L Morton
- NHMRC Clinical Trials Centre, University of Sydney, Sydney, NSW, Australia
| | - Mona Nasser
- Faculty of Health, University of Plymouth, UK
| | - Matthew J Page
- School of Public Health and Preventive Medicine, Monash University, Melbourne, VIC, Australia
| | - Jordi Pardo Pardo
- Cochrane Musculoskeletal Group, Ottawa Hospital Research Institute, Ottawa, ON, Canada
| | | | - Mark Petticrew
- Faculty of Public Health and Policy, London School of Hygiene and Tropical Medicine, London, UK
| | - Terri Pigott
- College of Education and Human Development, Georgia State University, Atlanta, GA, USA
| | - Kevin Pottie
- Department of Family Medicine, University of Ottawa, Ottawa, ON, Canada
| | | | - Tamara Rader
- Canadian Agency for Drugs and Technologies in Health, Ottawa, ON, Canada
| | | | - Hannah Rothstein
- Narendra Paul Loomba Department of Management, Baruch College, New York, NY, USA
| | - Holger J Schüneman
- Cochrane Canada and McMaster GRADE Centres, Department of Health Research Methods, Evidence, and Impact, McMaster University, Hamilton, ON, Canada
| | - Larissa Shamseer
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Beverley J Shea
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | - Rosiane Simeon
- Population Health, Interdisciplinary School of Health Sciences, University of Ottawa, Ottawa, ON, Canada
| | | | | | | | - Kednapa Thavorn
- Clinical Epidemiology Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- School of Epidemiology and Public Health, University of Ottawa, Ottawa, ON, Canada
| | | | - Brigitte Vachon
- School of Rehabilitation, Faculty of Medicine, Université de Montréal, Montreal, Canada
| | | | - Rebecca Villemaire
- Department of Mechanical Engineering, University of Ottawa, Ottawa, ON, Canada
| | | | - Laura Weeks
- Canadian Agency for Drugs and Technologies in Health, Ottawa, ON, Canada
| | - George Wells
- Cardiovascular Research Methods Centre, University of Ottawa Heart Institute, Ottawa, ON, Canada
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Merson S, Yang ZH, Brewer D, Olmos D, Eichholz A, McCarthy F, Fisher G, Kovacs G, Berney DM, Foster CS, Møller H, Scardino P, Cuzick J, Cooper CS, Clark JP. Focal amplification of the androgen receptor gene in hormone-naive human prostate cancer. Br J Cancer 2014; 110:1655-62. [PMID: 24481405 PMCID: PMC3960602 DOI: 10.1038/bjc.2014.13] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [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: 10/09/2013] [Revised: 12/18/2013] [Accepted: 12/19/2013] [Indexed: 01/28/2023] Open
Abstract
BACKGROUND Androgen receptor (AR)-gene amplification, found in 20-30% of castration-resistant prostate cancer (CRPCa) is proposed to develop as a consequence of hormone-deprivation therapy and be a prime cause of treatment failure. Here we investigate AR-gene amplification in cancers before hormone deprivation therapy. METHODS A tissue microarray (TMA) series of 596 hormone-naive prostate cancers (HNPCas) was screened for chromosome X and AR-gene locus-specific copy number alterations using four-colour fluorescence in situ hybridisation. RESULTS Both high level gain in chromosome X (≥4 fold; n=4, 0.7%) and locus-specific amplification of the AR-gene (n=6, 1%) were detected at low frequencies in HNPCa TMAs. Fluorescence in situ hybridisation mapping whole sections taken from the original HNPCa specimen blocks demonstrated that AR-gene amplifications exist in small foci of cells (≤ 600 nm, ≤1% of tumour volume). Patients with AR gene-locus-specific copy number gains had poorer prostate cancer-specific survival. CONCLUSION Small clonal foci of cancer containing high level gain of the androgen receptor (AR)-gene develop before hormone deprivation therapy. Their small size makes detection by TMA inefficient and suggests a higher prevalence than that reported herein. It is hypothesised that a large proportion of AR-amplified CRPCa could pre-date hormone deprivation therapy and that these patients would potentially benefit from early total androgen ablation.
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Affiliation(s)
- S Merson
- Molecular Carcinogenesis, Institute of Cancer Research, Male Urological Cancer Research Centre, Surrey, UK
| | - Z H Yang
- The Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, St Bartholomew's Medical School, Queen Mary, University of London, London, UK
| | - D Brewer
- 1] Molecular Carcinogenesis, Institute of Cancer Research, Male Urological Cancer Research Centre, Surrey, UK [2] Department of Cancer Genetics, University of East Anglia, Norwich, UK
| | - D Olmos
- Prostate Cancer Research, Spanish National Cancer Research Centre (CNIO), Melchor Fernández Almagro, 28029 Madrid, Spain
| | - A Eichholz
- Molecular Carcinogenesis, Institute of Cancer Research, Male Urological Cancer Research Centre, Surrey, UK
| | - F McCarthy
- Molecular Carcinogenesis, Institute of Cancer Research, Male Urological Cancer Research Centre, Surrey, UK
| | - G Fisher
- The Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, St Bartholomew's Medical School, Queen Mary, University of London, London, UK
| | - G Kovacs
- Laboratory of Molecular Oncology, Medical Faculty, Ruprecht-Karls-Universitat, Heidelberg, Germany
| | - D M Berney
- Department of Molecular Oncology, Barts Cancer Institute, Charterhouse Square, London, UK
| | - C S Foster
- Molecular Pathology Laboratory, Liverpool University, Liverpool, UK and HCA Laboratories, London, UK
| | - H Møller
- 1] The Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, St Bartholomew's Medical School, Queen Mary, University of London, London, UK [2] King's College London, Cancer Epidemiology and Population Health, London, UK
| | - P Scardino
- Department of Urology, Memorial Sloan-Kettering Cancer Center, New York, NY, USA
| | - J Cuzick
- The Centre for Cancer Prevention, Wolfson Institute of Preventive Medicine, St Bartholomew's Medical School, Queen Mary, University of London, London, UK
| | - C S Cooper
- Department of Cancer Genetics, University of East Anglia, Norwich, UK
| | - J P Clark
- Department of Cancer Genetics, University of East Anglia, Norwich, UK
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7
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Warren DE, Bickler PE, Clark JP, Gregersen M, Brosnan H, McKleroy W, Gabatto P. Hypothermia and rewarming injury in hippocampal neurons involve intracellular Ca2+ and glutamate excitotoxicity. Neuroscience 2012; 207:316-25. [PMID: 22265728 DOI: 10.1016/j.neuroscience.2011.12.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2011] [Revised: 12/16/2011] [Accepted: 12/19/2011] [Indexed: 11/18/2022]
Abstract
This study examines the causes of hypothermia and rewarming injury in CA1, CA3, and dentate neurons in rat hippocampal slice cultures. Neuronal death, assessed with propidium iodide or Sytox fluorescence, Fluoro-Jade labeling, and Cresyl Violet staining, depended on the severity and duration of hypothermia. More than 6 h at temperatures less than 12 °C followed by rewarming to 37 °C (profound hypothermia and rewarming, PH/RW) caused swelling and death in large number of neurons in CA1, CA3, and dentate. During PH, [ATP] decreased and [Ca(2+)](I) and extracellular [glutamate] increased, with neuron rupture and nuclear condensation following RW. The data support the hypothesis that neuronal death from PH/RW is excitotoxic, due to ATP loss, glutamate receptor activation and Ca(2+) influx. We found that antagonism of N-methyl-D-aspartate (NMDA) receptors, but not 2-amino-3-(5-methyl-3-oxo-1,2- oxazol-4-yl) propanoic acid or metabotropic glutamate receptors, decreased neuron death and prevented increases in [Ca(2+)](I) caused by PH/RW. Chelating extracellular Ca(2+) decreased PH/RW injury, but inhibiting L- and T-type voltage-gated Ca(2+) channels, K+ channels, Ca(2+) release from the endoplasmic reticulum, and reverse Na(+)/Ca(2+) exchange did not affect the Ca(2+) changes or cell death. We conclude that the mechanism of PH/RW neuronal injury in hippocampal slices primarily involves intracellular Ca(2+) accumulation mediated by NMDA receptors that activates necrotic, but not apoptotic processes.
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Affiliation(s)
- D E Warren
- Department of Anesthesia and Perioperative Care, Parnassus Avenue, University of California, San Francisco, CA 94143-0542, USA
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8
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Rochon PA, Mashari A, Cohen A, Misra A, Laxer D, Streiner DL, Clark JP, Dergal JM, Gold J. The Inclusion of Minority Groups in Clinical Trials: Problems of Under Representation and Under Reporting of Data. Account Res 2010; 11:215-23. [PMID: 15812967 DOI: 10.1080/08989620490891412] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
OBJECTIVE To evaluate the representation of minority groups in randomized control trials (RCTs), and the frequency with which this information is reported. STUDY DESIGN Reviewers collected data on the racial/ethnic composition of study samples from all RCTs published in six leading medical journals in 1999. RESULTS Of the 280 RCTs, most (204, 71.3%) provided no information on the race/ethnicity of participants. Of the 89 U.S.-based RCTs, 50 (56.1%) reported their minority distribution. Relative to other trials, those funded by the National Institute of Health (NIH) (n = 52) were more likely to report race/ethnicity data (55.8% vs. 23.7%; x2 = 20.9, p <_0.001) and to include nonwhite participants (13.5 % vs. 12.5%; x2=22.7, p<_0.001). CONCLUSION Minority groups are currently under-represented in clinical trials. Information on the race and ethnicity of clinical trial participants is currently underreported in six leading medical journals. Reporting of minority group information was significantly better only in NIH funded trials, which also were more likely to include nonwhite participants. This suggests that mandatory reporting policies may have a positive effect on both reporting and representation.
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Affiliation(s)
- Paula A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, 3560 Bathurst St., Toronto, ON M6A 2E1, Canada.
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9
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Abstract
The circadian pacemaker within the suprachiasmatic nucleus (SCN) confers daily rhythms to bodily functions. In nature, the circadian clock will adopt a 24-h period by synchronizing to the solar light/dark cycle. This light entrainment process is mediated, in part, at glutamatergic synapses formed between retinal ganglion afferents and SCN neurons. N-methyl-D-aspartate receptors (NMDARs) located on SCN neurons gate light-induced phase resetting. Despite their importance in circadian physiology, little is known about their functional stoichiometry. We investigated the NR2-subunit composition with whole cell recordings of SCN neurons within the murine hypothalamic brain slice using a combination of subtype-selective NMDAR antagonists and voltage-clamp protocols. We found that extracellular magnesium ([Mg](o)) strongly blocks SCN NMDARs exhibiting affinities and voltage sensitivities associated with NR2A and NR2B subunits. These NMDAR currents were inhibited strongly by NR2B-selective antagonists, Ro 25-6981 (3.5 microM, 55.0 +/- 9.0% block; mean +/- SE) and ifenprodil (10 microM, 55.8 +/- 3.0% block). The current remaining showed decreased [Mg](o) affinities reminiscent of NR2C and NR2D subunits but was highly sensitive to [Zn](o), a potent NR2A blocker, showing a approximately 44.2 +/- 1.1% maximal inhibition at saturating concentrations with an IC(50) of 7.8 +/- 1.1 nM. Considering the selectivity, efficacy, and potency of the drugs used in combination with [Mg](o)-block characteristics of the NMDAR, our data show that both diheteromeric NR2B NMDARs and triheteromeric NR2A NMDARs (paired with an NR2C or NR2D subunits) account for the vast majority of the NMDAR current within the SCN.
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Affiliation(s)
- J P Clark
- Department of Neuroscience, University of Minnesota, 6-145 Jackson Hall, 321 Church St. SE, Minneapolis, MN 55455, USA
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10
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Abstract
Qualitative research is a useful approach to explore perplexing or complicated clinical situations. Since 1996, at least fifteen qualitative studies in the area of total knee replacement alone were found. Qualitative studies overcome the limits of quantitative work because they can explicate deeper meaning and complexity associated with questions such as why patients decline joint replacement surgery, why they do not adhere to pain medication and exercise regimens, how they manage in the postoperative period, and why providers do not always provide evidence-based care. In this paper, we review the role of qualitative methods in orthopaedic research, using knee osteoarthritis as an illustrative example. Qualitative research questions tend to be inductive, and the stance of the investigator is relevant and explicitly acknowledged. Qualitative methodologies include grounded theory, phenomenology, and ethnography and involve gathering opinions and text from individuals or focus groups. The methods are rigorous and take training and time to apply. Analysis of the textual data typically proceeds with the identification, coding, and categorization of patterns in the data for the purpose of generating concepts from within the data. With use of analytic techniques, researchers strive to explain the findings; questions are asked to tease out different levels of meaning, identify new concepts and themes, and permit a deeper interpretation and understanding. Orthopaedic practitioners should consider the use of qualitative research as a tool for exploring the meaning and complexities behind some of the perplexing phenomena that they observe in research findings and clinical practice.
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Affiliation(s)
- Dorcas E Beaton
- Keenan Research Centre, Li Ka Shing Knowledge Institute, St. Michael's Hospital, 30 Bond Street, Toronto, ON M5B 1W8, Canada.
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11
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Abstract
To maximise benefits and minimise harm, equity must be built in from the start
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12
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Clark JP, Sampair CS, Kofuji P, Nath A, Ding JM. HIV protein, transactivator of transcription, alters circadian rhythms through the light entrainment pathway. Am J Physiol Regul Integr Comp Physiol 2005; 289:R656-62. [PMID: 15860648 DOI: 10.1152/ajpregu.00179.2005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Patients infected with the human immunodeficiency virus (HIV), and other mammals infected with related lentiviruses, exhibit fatigue, altered sleep patterns, and abnormal circadian rhythms. A circadian clock in the hypothalamic suprachiasmatic nucleus (SCN) temporally regulates these functions in mammals. We found that a secretary HIV transcription factor, transactivator of transcription (Tat), resets the murine circadian clock, in vitro and in vivo, at clinically relevant concentrations (EC50= 0.31 nM). This effect of Tat occurs only during the subjective night, when N-methyl-d-aspartate (NMDA) receptor [d-2-amino-5-phosphonovaleric acid (0.1 mM)] and nitric oxide synthase ( NG-nitro-l-arginine methyl ester, 0.1 mM) inhibitors block Tat-induced phase shifts. Whole cell recordings of SCN neurons within the brain slice revealed that Tat did not activate NMDA receptors directly but potentiated NMDA receptor currents through the enhancement of glutamate release. Consistent with this presynaptic mechanism, inhibitors of neurotransmission block Tat-induced phase shifts, such as tetrodotoxin (1 μM), tetanus toxin (1 μM), P/Q/N type-calcium channel blockers (1 μM ω-agatoxin IVA and 1 μM ω-conotoxin GIVA) and bafilomycin A1(1 μM). Thus the effect of Tat on the SCN may underlie lentiviral circadian rhythm dysfunction by operating as a disease-dependent modulator of light entrainment through the enhancement of excitatory neurotransmission.
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Affiliation(s)
- J P Clark
- Dept. of Physiology, Brody School of Medicine, East Carolina University, 600 Moye Blvd., Greenville, NC 27858, USA
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13
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Clark JP, Hudak PL, Hawker GA, Coyte PC, Mahomed NN, Kreder HJ, Wright JG. The moving target: a qualitative study of elderly patients' decision-making regarding total joint replacement surgery. J Bone Joint Surg Am 2004; 86:1366-74. [PMID: 15252082] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
BACKGROUND Total joint replacement is an accepted, cost-effective, and underutilized treatment for moderate-to-severe hip and knee arthritis. Yet, research has suggested that many patients with arthritis are unwilling to consider total joint replacement surgery. We sought to understand these patients' unwillingness by exploring the nature of their decision-making processes. METHODS In-depth interviews were conducted with seventeen individuals with moderate-to-severe arthritis who were appropriate candidates for, but unwilling to consider, total joint replacement. The interviews were analyzed with use of qualitative methods and content analysis techniques. RESULTS Symptoms and information sources were the two main factors influencing patient decision-making. Participants engaged in individualized processes of trading off perceived costs and benefits. Accommodation to pain and disability and minimization of the quality-of-life benefit, in view of decreasing life span, led to a process whereby the threshold at which the benefits compared with the risks would tilt in favor of total joint replacement was constantly shifting, a phenomenon we called "the moving target." CONCLUSIONS AND CLINICAL RELEVANCE The moving-target characterization sheds light on patients' conceptions of their arthritis and on their unwillingness to consider total joint replacement. This process needs to be considered when developing ways to aid decision-making.
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Affiliation(s)
- Jocalyn P Clark
- BMJ Publishing Group, BMA House, Tavistock Square, London WC1H 9JR, United Kingdom
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14
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Rochon PA, Mashari A, Cohen A, Misra A, Laxer D, Streiner DL, Dergal JM, Clark JP, Gold J, Binns MA. Relation between randomized controlled trials published in leading general medical journals and the global burden of disease. CMAJ 2004; 170:1673-7. [PMID: 15159365 PMCID: PMC408507 DOI: 10.1503/cmaj.1031006] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND More than two-thirds of the world's population live in low-income countries, where health priorities are different from those of people living in more affluent parts of the world. We evaluated the relation between the global burden of disease and conditions or diseases studied in randomized controlled trials (RCTs) published in general medical journals. METHODS A MEDLINE search identified 373 RCTs that had been published in 6 international peer-reviewed general medical journals in 1999. Manual review excluded non-RCTs, brief reports and trials in which the unit of randomization was not the patient; 286 RCTs remained eligible for analysis. We identified the RCTs that studied any of the 40 leading causes of the global burden of disease. Five of these conditions were considered unsuitable for study with an RCT design and were excluded from subsequent analysis. To provide a practical perspective, we asked 12 experts working with international health organizations to rate the relevance to global health of the articles that studied any of the top 10 causes of the global burden of disease, as measured by disability-adjusted life years (DALYs) and mortality, using a 5-point Likert scale. RESULTS Among the 286 RCTs in our sample, 124 (43.4%) addressed 1 of the 35 leading causes of the global burden of disease. Of these, ischemic heart disease, HIV/AIDS and cerebrovascular disease were the most commonly studied conditions. Ninety articles (31.5%) studied 1 of the top 10 causes of the global burden of disease. The mean rating (and standard deviation) for international health relevance assigned by experts was 2.6 (1.5) out of 5. Only 14 (16%) of the 90 trials received a rating of 4 or greater, indicating high relevance to international health. Almost half of the 40 leading causes of the global burden of disease were not studied by any trial. INTERPRETATION Many conditions or diseases common internationally are underrepresented in RCTs published in leading general medical journals. Trials published in these journals that studied one of these high-priority conditions were generally rated as being of little relevance to international health.
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Affiliation(s)
- Paula A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, 3560 Bathurst Street, Toronto, Ontario M6A 2E1, Canada.
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15
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Abstract
OBJECTIVE The Canadian Public Health Association, along with other professional organizations, has identified intimate partner violence (IPV) as a priority health issue to which the health professions must respond. This study synthesizes Canadian studies on the prevalence of IPV against women, focusing in particular on the stated implications for women's health and health care. METHODS Medical and social science databases were searched for all articles pertaining to IPV in Canada for 1974 through September 2000. Reference lists of these and other related publications were consulted to supplement the literature review. Data on study characteristics, methods, and results were extracted by two independent reviewers. Discrepancies were resolved by consensus. RESULTS Sixteen studies were identified in this review, 11 population-based and 5 conducted in clinical settings. Age, ethnicity, and socioeconomic status were not consistently documented, making comparisons and evaluations of generalizability difficult. Annual prevalence of IPV in Canada was found to range from 0.4% to 23%, with severe violence occurring from 2% to 10% annually. Less than two fifths (37.5%) of the studies incorporated a health-related measure. INTERPRETATION This review reveals a paucity of Canadian prevalence data on IPV, marked by design and methodological issues. Poor quality data may pose a challenge to articulating and establishing a coordinated health care response to eliminating IPV in Canada.
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Affiliation(s)
- Jocalyn P Clark
- Department of Public Health Sciences and the Institute for Women's Studies and Gender Studies, University of Toronto, Toronto, ON.
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16
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Clark JP, Du Mont J. Intimate partner violence and health: a critique of Canadian prevalence studies. Can J Public Health 2003; 94:52-8. [PMID: 12583680 PMCID: PMC6979624] [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] [Subscribe] [Scholar Register] [Received: 08/13/2001] [Accepted: 07/17/2002] [Indexed: 02/28/2023]
Abstract
OBJECTIVE The Canadian Public Health Association, along with other professional organizations, has identified intimate partner violence (IPV) as a priority health issue to which the health professions must respond. This study synthesizes Canadian studies on the prevalence of IPV against women, focusing in particular on the stated implications for women's health and health care. METHODS Medical and social science databases were searched for all articles pertaining to IPV in Canada for 1974 through September 2000. Reference lists of these and other related publications were consulted to supplement the literature review. Data on study characteristics, methods, and results were extracted by two independent reviewers. Discrepancies were resolved by consensus. RESULTS Sixteen studies were identified in this review, 11 population-based and 5 conducted in clinical settings. Age, ethnicity, and socioeconomic status were not consistently documented, making comparisons and evaluations of generalizability difficult. Annual prevalence of IPV in Canada was found to range from 0.4% to 23%, with severe violence occurring from 2% to 10% annually. Less than two fifths (37.5%) of the studies incorporated a health-related measure. INTERPRETATION This review reveals a paucity of Canadian prevalence data on IPV, marked by design and methodological issues. Poor quality data may pose a challenge to articulating and establishing a coordinated health care response to eliminating IPV in Canada.
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Affiliation(s)
- Jocalyn P Clark
- Department of Public Health Sciences and the Institute for Women's Studies and Gender Studies, University of Toronto, Toronto, ON.
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17
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Clark JP, Feldberg GD, Rochon PA. Representation of women's health in general medical versus women's health specialty journals: a content analysis. BMC Womens Health 2002; 2:5. [PMID: 12086593 PMCID: PMC116680 DOI: 10.1186/1472-6874-2-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [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: 04/02/2002] [Accepted: 06/20/2002] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND: Women's health, traditionally defined, emphasises reproductive and maternal conditions without consideration of social contexts. Advocates urge a broader conceptualisation. The medical literature influences the definitions and delivery of women's health care. We compared how women's health was represented in leading general medical (GM) versus women's health specialty (WS) journals. METHODS: Original investigations published between January 1 - June 30, 1999 in leading GM (n = 514) and WS (n = 82) journals were compared. Data were collected from 99 GM and 82 WS articles on women's health. Independent reviewers conducted content analyses of sample characteristics, study design, and health topic. Each article was classified as "Traditional" (e.g. menstruation, breast cancer), "Non-traditional" (e.g. abuse, osteoporosis), or "Both." RESULTS: Of the GM articles, 53 (53.5%) focused solely on a traditional women's health topic; half were reproductive and half female cancers. In contrast, 22 (26.8%) WS articles were traditionally focused. A non-traditional topic was the sole focus of 27 (27.3%) GM articles versus 34 (41.5%) WS articles. One-fifth of GM and one-third of WS articles addressed both. RCTs dominated the GM articles, while 40% of WS articles used qualitative or mixed study designs. Leading sources of women's death and disability were not well covered in either type of journal. CONCLUSIONS: Most GM articles drew on a narrow definition of women's health. WS journals provided more balanced coverage, addressing social concerns in addition to "navel-to-knees" women's health. Since GM journals have wide impact, editorial decisions and peer review processes should promote a broader conceptualisation of women's health.
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Affiliation(s)
- Jocalyn P Clark
- Department of Public Health Sciences University of Toronto and The Centre for Research in Women's Health Toronto, Canada
| | | | - Paula A Rochon
- Kunin-Lunenfeld Applied Research Unit Baycrest Centre for Geriatric Care and Departments of Medicine and Public Health Sciences University of Toronto Toronto, Canada
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Steele LS, Lemieux-Charles L, Clark JP, Glazier RH. The impact of policy changes on the health of recent immigrants and refugees in the inner city. A qualitative study of service providers' perspectives. Can J Public Health 2002. [PMID: 11963515 DOI: 10.1007/bf03404551] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Dramatic changes to health and social policy have taken place in Ontario over the last five years with few attempts to measure their impact on health outcomes. This study explored service providers' opinions about the impact of four major policy changes on the health of recent immigrant and refugee communities in Toronto's inner city. METHODS Semi-structured key informant interviews. RESULTS Reductions in funding for welfare, hospitals and community agencies were seen to have had major effects on the health of newcomers. Emergent themes included erosion of the social determinants of health, reduced access to health care, increased need for advocacy, deterioration in mental health, and an increase in wife abuse. CONCLUSIONS Several areas were identified where policy changes were perceived to have had a negative impact on the health of recent immigrants and refugees. This study provides insights for policy-makers, inner-city planners and researchers conducting population-based studies of immigrant health.
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Affiliation(s)
- Leah S Steele
- Inner City Health Research Unit, Department of Family and Community Medicine, St. Michael's Hospital, University of Toronto, Toronto, ON.
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19
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Hudak PL, Clark JP, Hawker GA, Coyte PC, Mahomed NN, Kreder HJ, Wright JG. "You're perfect for the procedure! Why don't you want it?" Elderly arthritis patients' unwillingness to consider total joint arthroplasty surgery: a qualitative study. Med Decis Making 2002; 22:272-8. [PMID: 12058784 DOI: 10.1177/0272989x0202200315] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE To explore the process by which elderly persons make decisions about a surgical treatment, total joint arthroplasty (TJA). METHODS In-depth interviews with 17 elderly individuals identified as potential candidates for TJA who were unwilling to undergo the procedure. RESULTS For the majority of participants, decision making involved ongoing deliberation of the surgical option, often resulting in a deferral of the treatment decision. Three assumptions may constrain elderly persons from making a decision about surgery. First, some participants viewed osteoarthritis not as a disease but as a normal part of aging. Second, despite being candidates for TJA according to medical criteria, many participants believed candidacy required a level of pain and disability higher than their current level. Third, some participants believed that if they either required or would benefit from TJA, their physicians would advise surgery. CONCLUSION These assumptions may limit the possibility for shared decision making. CLINICAL IMPLICATIONS Emphasis should be directed toward thinking about ways in which discussions about TJA might be initiated (and by whom) and considering how patients' views on and knowledge of osteoarthritis in general might be addressed.
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Steele LS, Lemieux-Charles L, Clark JP, Glazier RH. The impact of policy changes on the health of recent immigrants and refugees in the inner city. A qualitative study of service providers' perspectives. Can J Public Health 2002; 93:118-22. [PMID: 11963515 PMCID: PMC6979897] [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] [Subscribe] [Scholar Register] [Indexed: 02/24/2023]
Abstract
BACKGROUND Dramatic changes to health and social policy have taken place in Ontario over the last five years with few attempts to measure their impact on health outcomes. This study explored service providers' opinions about the impact of four major policy changes on the health of recent immigrant and refugee communities in Toronto's inner city. METHODS Semi-structured key informant interviews. RESULTS Reductions in funding for welfare, hospitals and community agencies were seen to have had major effects on the health of newcomers. Emergent themes included erosion of the social determinants of health, reduced access to health care, increased need for advocacy, deterioration in mental health, and an increase in wife abuse. CONCLUSIONS Several areas were identified where policy changes were perceived to have had a negative impact on the health of recent immigrants and refugees. This study provides insights for policy-makers, inner-city planners and researchers conducting population-based studies of immigrant health.
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Affiliation(s)
- Leah S Steele
- Inner City Health Research Unit, Department of Family and Community Medicine, St. Michael's Hospital, University of Toronto, Toronto, ON.
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Abstract
The health and safety of women who work as exotic dancers are firmly embedded within the social organization of the strip club and the broader social, economic and political context of the work of exotic dancing. Exotic dancers in this study expressed health concerns associated with: the effects of costuming and appearance requirements; dirty work environments; problems due to stigmatization, sexual harassment and assault; and police disinterest or victim blaming. The balance between benefits and hazards related to exotic dancing is influenced not only by the personal choices made by dancers, but also by the organization of the strip club and the broader context within which exotic dancing takes place.
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Affiliation(s)
- E Maticka-Tyndale
- Department of Sociology and Anthropology, University of Windsor, Ontario, Canada
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Rochon PA, Tu JV, Anderson GM, Gurwitz JH, Clark JP, Lau P, Szalai JP, Sykora K, Naylor CD. Rate of heart failure and 1-year survival for older people receiving low-dose beta-blocker therapy after myocardial infarction. Lancet 2000; 356:639-44. [PMID: 10968437 DOI: 10.1016/s0140-6736(00)02606-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Many older people do not receive beta-blocker therapy after myocardial infarction or receive doses lower than those tested in trials, perhaps because physicians fear that beta-blockers may precipitate heart failure. We examined the relation between use of beta-blockers, the dose used, and hospital admission for heart failure and 1-year survival in a cohort of all older patients surviving myocardial infarction in Ontario, Canada. METHODS We collected data on a cohort of 13,623 patients aged 66 years or older who were discharged from hospital after a myocardial infarction and who did not receive beta-blocker therapy or received low, standard, or high doses. We used Cox's proportional-hazards models to study the association of dose with admission for heart failure and survival with adjustment for factors including age, sex, and comorbidity. FINDINGS Among 8232 patients with no previous history of heart failure, dispensing of beta-blocker therapy was associated with a 43% reduction in subsequent admission for heart failure (adjusted risk ratio 0.57 [95% CI 0.48-0.69]) compared with patients not dispensed this therapy. Among the 4681 patients prescribed beta-blockers, the risk of admission was greater in the high-dose than in the low-dose group (1.53 [1.01-2.31]). Among all 13,623 patients in the cohort, 2326 (17.1%) died by 1 year. Compared with those not dispensed beta-blocker therapy, the adjusted risk ratio for mortality was lower for all three doses (low 0.40 [0.34-0.47], standard 0.36 [0.31-0.42], high 0.43 [0.33-0.56]). INTERPRETATION Compared with high-dose beta-blocker therapy, low-dose treatment is associated with a lower rate of hospital admission for heart failure and has a similar 1-year survival benefit. Our findings support the need for a randomised controlled trial comparing doses of beta-blocker therapy in elderly patients.
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Affiliation(s)
- P A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, University of Toronto, Ontario, Canada
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Abstract
OBJECTIVE To determine the representation of the sexes in JAMA cover art. DESIGN Review of 50 consecutive issues. SETTING JAMA, March 1997-March 1998. MAIN OUTCOME MEASURES Numbers and nature of covers portraying men and women. RESULTS Of the 50 covers, 34 depicted humans. 15 depicted women, 13 men, and 6 were of mixed or indeterminate sex. 11 pictures of women included a child and five included nudity. One cover showed a man with a child (not as a father) and none depicted nudity. Men were depicted exclusively in authoritative roles. CONCLUSIONS Much of the cover art gives strong messages about sexual stereotypes that are inappropriate in modern society. JAMA should consider reviewing its policy for choosing cover art.
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Affiliation(s)
- J P Clark
- Department of Public Health Sciences, University of Toronto, Canada.
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Rochon PA, Anderson GM, Tu JV, Clark JP, Gurwitz JH, Szalai JP, Lau P. Use of beta-blocker therapy in older patients after acute myocardial infarction in Ontario. CMAJ 1999; 161:1403-8. [PMID: 10906894 PMCID: PMC1230828] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
BACKGROUND Despite its proven efficacy, beta-blocker therapy remains underused in elderly patients after myocardial infarction (MI). The objectives of this study were to identify undertreated groups of seniors and to determine whether older and frailer patients are being selectively dispensed low-dose beta-blocker therapy. METHODS From a comprehensive hospital discharge database, all people aged 66 years or more in Ontario who survived an acute MI between April 1993 and March 1995 were identified and classified into those who did not receive beta-blocker therapy and those dispensed low, standard or high doses of this agent. Logistic regression models were used to study the effect of age, sex, comorbidity, potential contraindications to beta-blocker therapy and residence in a long-term-care facility on the odds of not being dispensed a beta-blocker. Among beta-blocker users, the odds of being dispensed low relative to standard or high doses of this agent were evaluated. RESULTS Of the 15,542 patients, 7549 (48.6%) were not dispensed a beta-blocker. Patients 85 years of age or more were at greater risk of not receiving beta-blocker therapy (adjusted odds ratio [OR] 2.8, 95% confidence interval [CI] 2.5-3.2) than were those 66 to 74 years. Having a Charlson comorbidity index of 3 or greater was associated with an increased risk of not receiving beta-blocker therapy (adjusted OR 1.5, 95% CI 1.3-1.8) compared with having lower comorbidity scores. Patients who resided in a long-term-care facility were at increased risk of not being prescribed beta-blocker therapy (adjusted OR 2.6, 95% CI 2.0-3.4). Among the 5453 patients with no identifiable contraindication to beta-blocker therapy, women were significantly less likely than men to receive this agent (p = 0.005). Of the 6074 patients who received beta-blockers, 2248 (37.0%) were dispensed low-dose therapy. Patients aged 85 years or more had an increased risk of being dispensed low-dose therapy (adjusted OR 1.6, 95% CI 1.3-2.0) compared with those aged 66 to 74 years. Compared with those who had the lowest comorbidity scores, patients with the highest comorbidity scores were more likely to be dispensed low-dose beta-blocker therapy (adjusted OR 1.3, 95% CI 1.0-1.8). INTERPRETATION Almost half of Ontario patients aged 66 or more who survived an MI, particularly those who were older or frailer, did not receive beta-blocker therapy. Among those dispensed beta-blocker therapy, older and frailer patients were more frequently dispensed low-dose therapy.
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Affiliation(s)
- P A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, Toronto, Ont.
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Rochon PA, Anderson GM, Tu JV, Gurwitz JH, Clark JP, Shear NH, Lau P. Age- and gender-related use of low-dose drug therapy: the need to manufacture low-dose therapy and evaluate the minimum effective dose. J Am Geriatr Soc 1999; 47:954-9. [PMID: 10443856 DOI: 10.1111/j.1532-5415.1999.tb01290.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
OBJECTIVES Low-dose drug therapy is promoted as a way to maximize benefit and minimize adverse drug effects when prescribing for older adults. This population-based study evaluates the age and sex-related use of two common therapies: thiazide diuretics, where evidence supports the use of low-dose therapy, and beta-blockers, where trials have not evaluated the minimum effective dose. DESIGN Using linked administrative databases we identified all of the 120,613 persons dispensed a thiazide diuretic therapy and 12,908 myocardial infarction survivors dispensed beta-blocker therapy in Canada's largest province. We used logistic regression models to study the association of age and sex with dispensing of low-dose thiazide diuretic and beta-blocker therapy at doses lower than evaluated in trials. RESULTS Of 120,613 older people dispensed a thiazide diuretic, 32,372 (26.8%) were dispensed a low dose. Patients 85 years of age or older, relative to the youngest group, were 30% more likely to be dispensed low-dose therapy (OR=1.31; 95% CI, 1.27 to 1.36; P < .001). Women were 8% more likely than men to be dispensed a low-dose thiazide diuretic (OR=1.08; 95% CI, 1.05 to 1.11; P < .001). Of 10,991 myocardial infarction survivors dispensed atenolol, metoprolol, propranolol, or timolol, 9458 (86.1%) were dispensed a lower-than-evaluated dose. Patients 85 years of age or older, relative to those in the youngest group, were more than twice as likely to be dispensed a lower-than-evaluated beta-blocker therapy dose (OR=2.28; 95% CI, 1.74 to 3.04; P < .001). No difference was noted in the use of beta-blocker therapy dose by sex (OR=1.0; 95% CI, .89 to 1.15; P = .95). CONCLUSIONS Low-dose thiazide diuretic therapy prescribed widely to older people, particularly those of advanced age and women. The vast majority of myocardial infarction survivors were dispensed beta-blocker therapy at lower-than-evaluated doses. These findings highlight the need to manufacture low-dose thiazide diuretic therapy and to evaluate the minimum effective dose of beta-blocker therapy.
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Affiliation(s)
- P A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, University of Toronto, Ontario, Canada
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Maticka-Tyndale E, Lewis J, Clark JP, Zubick J, Young S. Social and cultural vulnerability to sexually transmitted infection: the work of exotic dancers. Can J Public Health 1999. [PMID: 10189733 DOI: 10.1007/bf03404092] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
This article examines the social and cultural factors that influence the vulnerability of female exotic dancers to sexually transmitted infections. Results are based on a qualitative, exploratory study using observations in 10 clubs and in-depth interviews with 30 dancers in southern Ontario. The social and cultural context within which exotic dancing takes place contributes to a chronic state of sexual harassment and sexual assault in the strip clubs. Women are pressured by economics and by their customers to engage in sex for pay. The defence mechanisms that some women use to deal with these work conditions also contribute to women's vulnerability. The social structure of strip clubs and their policies toward employees and customers can either reduce or exacerbate the vulnerability of dancers. Workplace policies and health and safety standards appear to be the most effective ways to decrease the vulnerability of dancers. Public health units can work with employers and dancers to establish workplace policies and programmes that contribute to the health and wellbeing of dancers.
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Rochon PA, Clark JP, Gurwitz JH. Challenges of prescribing low-dose drug therapy for older people. CMAJ 1999; 160:1029-31. [PMID: 10207345 PMCID: PMC1230198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/11/2023] Open
Affiliation(s)
- P A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, Toronto, Ont
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Luo J, Cheung J, Yevich EM, Clark JP, Tsai J, Lapresca P, Ubillas RP, Fort DM, Carlson TJ, Hector RF, King SR, Mendez CD, Jolad SD, Reaven GM. Novel terpenoid-type quinones isolated from Pycnanthus angolensis of potential utility in the treatment of type 2 diabetes. J Pharmacol Exp Ther 1999; 288:529-34. [PMID: 9918555] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/10/2023] Open
Abstract
Using an ethnomedical-based drug discovery program, two previously unknown compounds (SP-18904 and SP-18905) from Pycnanthus angolensis were isolated that lower glucose concentrations in mouse models of type 2 diabetes. SP-18904 and SP-18905 are terpenoid-type quinones that significantly lowered plasma glucose concentration (p <.05) when given orally to either ob/ob or db/db mice, both of which are hyperglycemic and hyperinsulinemic. The antihyperglycemic actions of SP-18904 and SP-18905 were associated with significant decreases in plasma insulin concentrations (p <.05), suggesting that both compounds lowered glucose by enhancing insulin-mediated glucose uptake. This was supported by the insulin suppression test in ob/ob mice. Studies in hyperglycemic, insulin-deficient mice and in vitro experiments on 3T3-L1 adipocytes further supported this conclusion. As such, these two terpenoid-type quinones represent a new class of compounds of potential use in the treatment of type 2 diabetes.
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Affiliation(s)
- J Luo
- Shaman Pharmaceuticals, Inc., South San Francisco, California 94080- 4812, USA
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Rochon PA, Clark JP, Binns MA, Patel V, Gurwitz JH. Reporting of gender-related information in clinical trials of drug therapy for myocardial infarction. CMAJ 1998; 159:321-7. [PMID: 9732709 PMCID: PMC1229590] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Concern has been expressed that women are not adequately represented in clinical trials evaluating treatments for medical conditions they commonly experience. This study was designed to assess the reporting of data on women in recently published trials of drug therapy for myocardial infarction, including those funded by an agency with a gender-related policy. METHODS All randomized controlled trials and meta-analyses of drug therapies for myocardial infarction published in The New England Journal of Medicine, The Lancet, The Journal of the American Medical Association, the Annals of Internal Medicine and the British Medical Journal from January 1992 to December 1996 were evaluated. On preliminary review 102 articles met the inclusion criteria; these were reviewed in detail, and 59 were excluded. Two reviewers independently extracted gender-related information from the 43 articles; discrepancies were resolved by consensus. RESULTS Women presented up to 48% of the trial participants (mean 24.1%). In the trials funded by an agency with a gender-related policy, only 16.8% of participants, on average, were women. Of the 43 articles in the sample, only 14 (32%) provided gender-related results. Funding from an agency with gender-related policy did not affect the reporting of gender-related information. Subgroup analyses were provided for 14 (32%) of the 43 trials, including 2 (29%) of 7 trials funded by an agency with a gender-related policy. Of the 12 trials that included interaction analyses (excluding the 2 trials in which secondary analyses were conducted specifically to identify differences between women and men), 7 (58%) conducted an interaction analysis to determine if women responded differently than men; for one of these the interaction analysis was for a secondary outcome measure (drug safety). Only 5 (12%) of the 43 articles mentioned the differences between men and women in the Discussion section; 2 of these were studies that used secondary analyses to examine sex differences. Of the 5, only 1 was funded by an agency with a gender-related policy. INTERPRETATION Women were poorly represented in the randomized controlled trials in this sample, regardless of whether the trials were funded by an agency with a gender-related policy. Structured reporting of gender-related information for clinical trials may improve the quality of information available about women and therefore facilitate the application of research findings to the care of women.
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Affiliation(s)
- P A Rochon
- Kunin-Lunenfeld Applied Research Unit, Baycrest Centre for Geriatric Care, Toronto, Ont.
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Rardin KD, Gillespie WJ, Clark JP, Strachan R, Golden R. Document imaging: defining its role. Healthc Inform 1996; 13:76-9, 81. [PMID: 10155769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Clark JP. Non-profits in cyberspace: the fund raiser's guide. Fund Raising Manage 1995; 26:28, 30-2. [PMID: 10151832] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/11/2023]
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Warren W, Clark JP, Gardner E, Harris G, Cooper CS, Lawley PD. Chemical induction of thymomas in AKR mice: interaction of chemical carcinogens and endogenous murine leukemia viruses. Comparison of N-methyl-N-nitrosourea and methyl methanesulphonate. Mol Carcinog 1990; 3:126-33. [PMID: 2164817 DOI: 10.1002/mc.2940030305] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
The time course of development of thymic lymphoma, which occurs spontaneously in mice of the AKR strain, is accelerated by the methylating agents N-methyl-N-nitrosourea (MNU) and methyl methanesulphonate (MMS). Since MNU is a potent mutagen inducing G----A transition mutations and MMS a relatively weak mutagen, it was of interest to examine the genetic alterations associated with each class of the chemically induced tumors and to compare these alterations with those found in the spontaneous tumors. The same spectrum of genetic alterations was found for MMS-induced and spontaneous thymomas. Both showed rearrangements of c-myc and Pim-1 genes that appeared to result from integration of recombinant mink cytopathic focus-forming (MCF) proviruses but failed to reveal evidence for activation of ras oncogenes, either by DNA transfection experiments or by hybridization of DNA to specific oligonucleotide probes. Some alteration in c-myc and Pim-1 genes were also found in MNU-induced tumors, but, mainly, these involved integration of ecotropic-like rather than recombinant MCF viruses. Furthermore, MNU-induced tumors frequently (in 24% of thymomas) contained G----A transition mutations, activating the Ki-ras oncogene at codon 12 position 2. Another feature that distinguishes the MNU-induced tumors from those occurring in untreated and MMS-treated mice was the consistently high level of c-myc mRNA that occurred in the absence of c-myc gene rearrangement. Taken together, the data indicate that the mechanisms of development of tumors following treatment with MNU and MMS are distinct, and that the effect of MMS is probably to speed up the process of viral leukemogenesis.
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Affiliation(s)
- W Warren
- Institute of Cancer Research, Chester Beatty Laboratories, London Hospital Medical College, England
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Hollinger RC, Clark JP. Deterrence in the workplace: perceived certainty, perceived severity, and employee theft. Soc Forces 1983; 62:398-418. [PMID: 10264479 DOI: 10.1093/sf/62.2.398] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The phenomenon of employee theft is examined empirically, utilizing a deterrence paradigm. Employees selected randomly from three different industry sectors and metropolitan areas were asked to self-report their involvement in a number of property theft activities within the employment setting. Using a weighted least-squares logit regression analysis, the study found that the perception of both the certainty and severity of organizational sanctions were related to employee theft. Males reported more theft than did females, but contrary to previous research, no gender/certainty or gender/severity interactions were observed. The best-fit model did, however, contain two significant first-order interactions: age/certainty and age/severity. These interactions strongly suggest that younger employees are not as deterrable as their older peers, especially under conditions of both high certainty and high severity of punishment. While a number of possible explanations might account for differential deterrability according to age, a commitment to or stakes in conformity explanation is proposed.
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Abstract
NZB x NZW (NZB x W) F1 hybrid mice spontaneously develop a disease most prominently characterized by immune complex glomerulonephritis (GN), which seems to be associated with both antibodies to DNA and to the serum retroviral envelope glycoprotein, gp70. To evaluate the contribution of each of these autoimmune responses to the pathogenesis of the GN, we studied NZB x W F2 mice in which the two responses appeared to segregate relatively independently. Use of this model permitted analysis of possible correlations between each response and the G.N. The presence of circulating anti-gp 70-complexed gp70 correlated significantly with the development of fatal GN and one could predict the course of renal disease by computing the rising serum levels of gp70 complexed with antibodies. In contrast, the presence of free antibodies to either double-stranded or single-stranded DNA was not significantly associated with the development of fatal GN. This association of anti-gp70 antibody production with these animals' early death from GN strongly suggests that the gene(s) governing production of antibodies to serum retroviral gp70 may be one of the major genes responsible for spontaneous renal disease segregated in NZB x W F2 generations.
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Bolton TB, Clark JP. Actions of various muscarinic agonists on membrane potential, potassium efflux, and contraction of longitudinal muscle of guinea-pig intestine. Br J Pharmacol 1981; 72:319-34. [PMID: 7214100 PMCID: PMC2071508 DOI: 10.1111/j.1476-5381.1981.tb09131.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
1 Depolarizations were recorded intracellularly in smooth muscle from the taenia of the guinea-pig caecum in response to the iontophoretic application of acetylcholine, carbachol, oxotremorine-M, methylfurmethide, hexyl trimethylammonium and tetramethylammonium (TMA). 2 No differences between the iontophoretic responses to agonists stable to cholinesterase were detected. 3 The latency and time to peak of acetylcholine-induced depolarizations were less than those to stable agonists, and the response was briefer and less complex in shape. These differences were reduced, or disappeared, upon inhibition of cholinesterase. 4 The rate of loss of 42K and changes in length were measured in superfused strips weighing about 10 mg of separated longitudinal muscle of guinea-pig ileum. 5 Acetylcholine, carbachol, methylfurmethide, butyltrimethylammonium and TMA contracted the muscle and increased the rate of loss of 42K. 6 Contrary to previous reports, no evidence of a selective action of any of these agonists on 42K loss was detected. TMA appeared to be a partial agonist in evoking 42K loss, although it produced a maximum contraction. 7 The maximum 42K efflux produced by acetylcholine was about 40% of the maximum evoked by application of carbachol or methylfurmethide. If cholinesterase was inhibited, the 42K efflux evoked by maximally effective concentrations of acetylcholine was comparable to that evoked by a stable agonist. 8 These results are consistent with the idea that the muscarinic agonists used interact in an essentially similar way with muscarinic receptors to produce their effects on membrane potential, permeability, and tension.
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Abstract
1. Shortening and rate of loss of (42)K were studied in strips of longitudinal muscle taken from guinea-pig ileum.2. Carbachol, histamine and raising the external potassium concentration, [K(+)](o), to 120 mm in the presence of atropine caused equal maximal shortenings of the muscle, but unequal maximal increases in (42)K efflux: maximal (42)K effluxes obtainable in response to raised [K(+)](o) and histamine were about (2/3) and (1/3) respectively of the maximal efflux in response to carbachol. In the absence of atropine the increase in (42)K efflux produced by 120 mm-[K(+)](o) was about 50% larger, probably because of the release of acetylcholine from nerve endings in the tissue.3. If inhibitors of histamine metabolism were applied, or a H(2)-receptor blocker (cimetidine), the maximum (42)K efflux produced by histamine was not increased. An analogue of histamine reputed to resist metabolic degradation did not produce a larger increase in (42)K efflux than histamine. The smaller maximal effect of histamine on (42)K efflux than carbachol may be because it can open fewer ion channels in the smooth muscle membrane.4. The ratio of the concentrations producing 50% maximal shortening and 50% maximal (42)K efflux was about 1:1.3 for raised [K(+)](o) but about 1:20 for histamine and carbachol. Depolarization by raising [K(+)](o) appears to be less effective in causing tension development than similar depolarizations produced by carbachol or histamine.5. The relative effects of carbachol, histamine and raised [K(+)](o) were discussed in the light of their similar depolarizing actions. Increases in (42)K efflux did not appear to be caused primarily either by contraction or by depolarization of the muscle. Access of the stimulant to cells and receptors other than those which are superficially situated was suggested as being an important factor in deciding the smaller increase in (42)K efflux seen with some stimulants. Histamine receptors may be fewer in number than muscarinic receptors and less able in their activated form to open channels through which potassium ions can escape.
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Bolton TB, Clark JP, Kitamura K, Lang RJ. Evidence that histamine and carbachol may open the same ion channels in longitudinal smooth muscle of guinea-pig ileum. J Physiol 1981; 320:363-79. [PMID: 6275077 PMCID: PMC1244053 DOI: 10.1113/jphysiol.1981.sp013955] [Citation(s) in RCA: 39] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
1. Membrane potential was recorded intracellularly by micro-electrode in separated longitudinal muscle of guinea-pig ileum. Electrotonic potentials were evoked in longitudinal strips by passing current between large external electrodes in the partition chamber.2. Histamine increased the frequency of action potential discharge at low concentrations and depolarized the membrane. At higher concentrations it caused substantial depolarization and action potential discharge was abolished. Carbachol had similar actions but the maximal depolarization by carbachol (using 10(-4)m) was some 4-5 mV greater than maximal depolarization by histamine (using 10(-4)m).3. The change in size of evoked electrotonic potentials was used to estimate the effects of carbachol and histamine on the conductance of the smooth muscle membrane. The equilibrium potentials for histamine and carbachol depolarizations were estimated from their relative effects on potential and conductance and were found to be not significantly different; measurements of the effects on conductance showed that 10(-4)m-histamine increased conductance about 8-fold whilst 10(-4)m-carbachol had a much greater effect on conductance. This difference could explain the differing maximal depolarizing effects of these agents if both were assumed to open channels having the same ionic selectivity (i.e. equilibrium potential).4. The efflux of (42)K was studied in separated strips of longitudinal ileal muscle from guinea-pig. In the presence of a concentration of carbachol (2 x 10(-5)m or 10(-4)m) having a maximal effect on (42)K efflux rate, histamine (10(-4)m) did not increase efflux further although 120 mm-potassium did so. Experiments with the irreversible muscarinic receptor blocker, propylbenzilylcholine mustard, indicated that the number of muscarinic receptors did not limit the (42)K efflux response to carbachol and it was suggested that the response was limited by the availability of ion channels which could be opened by activated muscarinic receptors.5. Contractions to histamine and carbachol in 120 mm-potassium depolarizing solution were followed upon washing by a relaxation below basal tension. Carbachol, but not histamine, showed a pronounced and long lasting secondary contraction following this relaxation.6. These results are consistent with the idea that activated histamine and activated muscarinic receptors open the same ion channels in the smooth muscle membrane to produce depolarization, increased action potential discharge and contraction, although muscarinic receptors can open more of these. However, there was evidence that the opening of these channels is not the only pathway between receptor activation and contraction.
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Kessler II, Clark JP. Saccharin, cyclamate, and human bladder cancer. No evidence of an association. JAMA 1978; 240:349-55. [PMID: 660869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
An epidemiologic study designed to elucidate the possible roles of the artificial sweeteners saccharin and cyclamate in human urinary bladder cancer was recently completed. The previous intake of each of these substances among 519 patients with histopathologically confirmed bladder cancer and an equal number of matching controls in metropolitan Baltimore did not differ significantly in frequency, quantity, or duration. These normal findings persisted after simultaneous adjustment for the effects of smoking, occupation, age, diabetes mellitus, and a number of other potentially confounding factors. They are substantiated by the failure of the relative risk of bladder cancer to increase with increasing exposure to artificial sweeteners. It is concluded that neither saccharin nor cyclamate is likely to be carcinogenic in man, at least at the moderate dietary ingestion levels reported by the patient sample.
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Kilmore MA, Clark JP, Holmes JA. Effect of ketamine on myocardial irritability. Res Commun Chem Pathol Pharmacol 1974; 8:723-6. [PMID: 4472576] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Kilmore MA, Clark JP. Comparison of myocardial irritability of selected anesthetics. Res Commun Chem Pathol Pharmacol 1971; 2:837-58. [PMID: 4405003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Summers GF, Burke M, Saltiel S, Clark JP. DIMENSIONS OF PERSONALITY: I. CONJOINT FACTOR STRUCTURE OF GUILFORD AND CATTELL TRAIT MARKERS. Multivariate Behav Res 1971; 6:35-62. [PMID: 26744793 DOI: 10.1207/s15327906mbr0601_3] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The Work Component Study was administered to high school students and the stability of the structure of the variables of work motivation examined. The strudure found among college students and college trained employees is well developed at the high school level. The relationship of work motivations to personality variables and to aspirations is also dear: However, there is little relationship found between work motivations and status variables of the students or their parents. This was unanticipated and oreates a question regarding the sources of work motivations.
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