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2025, Number 3

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Rev Fac Med UNAM 2025; 68 (3)

What is the Evidence Pyramid?

Almiray SAL, Clark P, Merino FDV, Sánchez ML, Guagnelli MMÁ

Language: Spanish
References: 18
Page: 30-39
PDF size: 751.43 Kb.


ABSTRACT

Ongoing professional development is essential for healthcare providers to enhance clinical decision-making based on scientific evidence. Every year, millions of studies are published, making it crucial for professionals to develop the skills needed to critically assess the validity and applicability of this vast body of information. The evidence pyramid is a widely used tool that classifies different types of studies according to their scientific rigor, placing systematic reviews and meta-analyses at the top, as they are considered the most reliable sources of evidence. At the base are studies with lower levels of evidence, such as case reports and expert opinions. However, even the most robust studies have limitations that must be carefully evaluated.
Evidence-based medicine (EBM), which emerged in the 1980s, seeks to integrate the best available scientific evidence with clinical expertise and patient values. The traditional evidence pyramid has evolved over time, addressing the limitations of existing studies and proposing dynamic approaches to more accurately assess the quality of evidence. The GRADE system and recent adaptations of the pyramid have strengthened the process of critical appraisal, enabling more informed and less biased clinical decisions.
The adoption of evidence-based practices requires healthcare professionals to develop competencies in the use of tools for critically evaluating scientific information. Additionally, the incorporation of new technologies—such as artificial intelligence for data management—will play a key role in enhancing the quality of clinical practice and patient care.


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