evidence-based medicine

evidence-based medicine
Name	Evidence-based medicine
Focus	Clinical decision-making
Invented	1990s
Related	Clinical audit, Health technology assessment, Randomized controlled trial

evidence-based medicine is a clinical approach that integrates individual clinical expertise with the best available external clinical evidence from systematic research and consideration of patient values and preferences. It emerged as a response to variable clinical practices and aims to improve healthcare outcomes by applying rigorous methods of evidence appraisal, synthesis, and application. Proponents include clinicians, researchers, and policymakers working across academic institutions and health systems to reduce unwarranted variation in care and promote transparency.

History

The intellectual roots trace to early clinical pioneers and institutions such as Hippocrates, William Osler, and the founding of hospitals like Guy's Hospital and Johns Hopkins Hospital, combined with methodological developments from figures linked to Austin Bradford Hill, Archie Cochrane, and Cochrane Collaboration. Key institutional milestones include the launch of the Cochrane Collaboration and the formalization at universities including McMaster University and Oxford University. Influential works and events shaping the movement include publications by David Sackett, debates at meetings like World Health Organization conferences, and the wider adoption of randomized evidence following trials exemplified by the Streptomycin trial and subsequent regulatory shifts influenced by agencies such as the Food and Drug Administration and National Institute for Health and Care Excellence.

Principles and methodology

Core principles derive from methodological standards developed in settings including Cochrane Collaboration, Agency for Healthcare Research and Quality, and academia such as Harvard Medical School and Stanford University School of Medicine. Methodological pillars include study design hierarchies featuring Randomized controlled trial, Cohort study, and Case-control study; critical appraisal tools inspired by frameworks from David Sackett and groups associated with Guyatt at McMaster University. Systematic review and meta-analysis methods were advanced by statisticians and organizations including The Cochrane Collaboration and contributors from London School of Hygiene & Tropical Medicine and Johns Hopkins Bloomberg School of Public Health. Reporting standards such as CONSORT and PRISMA were developed alongside guideline-producing bodies like National Institute for Health and Care Excellence and World Health Organization to support transparent methods.

Clinical application and practice

Clinicians working in institutions like Mayo Clinic, Cleveland Clinic, and university hospitals apply evidence through clinical practice guidelines produced by organizations such as American College of Cardiology, American Diabetes Association, and Society of Critical Care Medicine. Decision support tools have been implemented in settings using software developed at companies linked with academic centers like Massachusetts General Hospital and Karolinska Institutet. Examples of practice change driven by evidence include management recommendations from European Society of Cardiology and screening policies influenced by panels from U.S. Preventive Services Task Force and National Comprehensive Cancer Network.

Education and training

Educational integration occurred at medical schools including McMaster University, University of Toronto, University of Oxford, and University of Cambridge via curricula emphasizing critical appraisal, biostatistics, and epidemiology. Training programs and continuing education are offered by organizations such as Royal College of Physicians, American Board of Internal Medicine, European Board of Medical Specialists, and professional societies like American Medical Association. Texts and resources by authors affiliated with Harvard Medical School and courses at institutions like Stanford University and Yale School of Medicine provide instructional materials and assessment frameworks.

Criticisms and limitations

Critiques have been articulated by clinicians and scholars from institutions including University College London and commentators publishing in journals associated with BMJ Group and The Lancet. Concerns include overreliance on randomized trials when evidence from observational studies (e.g., from registries like National Cancer Institute databases) might be informative, applicability across diverse populations such as those served by Centers for Disease Control and Prevention, and the influence of industry funding linked to companies regulated by European Medicines Agency. Debates have involved ethicists and policymakers from bodies like Nuffield Council on Bioethics and legal cases adjudicated in courts such as Supreme Court of the United States when standards intersect with policy.

Research and evidence synthesis

Major contributors to evidence synthesis include organizations and networks such as Cochrane Collaboration, Campbell Collaboration, Institute of Medicine (now National Academy of Medicine), and academic centers at Johns Hopkins and Imperial College London. Methodological innovations include network meta-analysis, trial sequential analysis, and living systematic reviews developed by researchers across University of Bern, McMaster University, and University of Sydney. Large consortia and data-sharing initiatives involve institutions and funders such as National Institutes of Health, Wellcome Trust, and multinational collaborations supported by agencies like the European Commission.

Implementation and policy impact

Implementation science activities have been pursued by groups at RAND Corporation, World Health Organization, and health systems including National Health Service and Veterans Health Administration to translate evidence into practice. Policy instruments influenced by evidence-based approaches include clinical guidelines from National Institute for Health and Care Excellence and reimbursement decisions by agencies such as Centers for Medicare & Medicaid Services and regulatory approvals by Food and Drug Administration. International health policy dialogues have involved actors like World Bank and Gavi, the Vaccine Alliance in applying synthesized evidence to programmatic decisions.

Category:Medicine