Evidence-based medicine: what is the evidence that it has made a difference?

Area of Science:

• Medical Research Methodology
• Clinical Decision-Making
• Healthcare Policy

Background:

• Evidence-based medicine (EBM) has enhanced critical evaluation of interventions over two decades.
• The integration of EBM with healthcare funding constraints has led to concerns about access to treatment.
• Clinicians express unease with EBM, particularly regarding its application to individual patient care and complex interventions.

Purpose of the Study:

• To critically assess the impact and limitations of Evidence-based medicine (EBM) in clinical practice.
• To explore the challenges EBM faces with complex interventions and symptom control in palliative care.
• To re-evaluate the primary role of EBM in shaping future research agendas.

Main Methods:

• The study reviews the evolution and application of EBM principles.
• It analyzes the difficulties in applying EBM to complex interventions and limited evidence scenarios.
• It considers the perspective of EBM's role in directing research priorities.

Main Results:

• EBM has raised standards but can be misused, leading to clinician apprehension.
• Paucity of high-quality evidence hinders EBM guidance, especially for symptom control and complex interventions.
• Systematic reviews highlight methodological deficits and data gaps, informing future research.

Conclusions:

• While EBM enhances critical appraisal, its application requires careful consideration of individual patient needs and evidence limitations.
• There is a need to improve trial and review methodologies for complex interventions.
• The most crucial function of EBM is its ability to define and advance the research agenda.