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Basics of methodologic analysis of therapeutic trials. Part I: Validity of the results
Isabel Soares1, António Vaz Carneiro
1Serviço de Medicina I, Hospital Egas Moniz, Lisboa.
Insights
Critical appraisal of randomized controlled trials (RCTs) is essential for clinicians. This article introduces guidelines for evaluating the validity of RCT evidence in therapeutic decision-making.
Area of Science:
- Cardiology
- Clinical Trials
- Evidence-Based Medicine
Background:
- Choosing optimal patient management strategies is a key clinical challenge.
- Randomized controlled trials (RCTs) are the gold standard for therapeutic evidence but have limitations.
- Methodological quality of therapeutic trials varies significantly.
Purpose of the Study:
- To introduce guidelines for critically appraising evidence from therapeutic randomized controlled trials.
- To focus on the crucial aspect of validity in the critical appraisal of RCTs.
Main Methods:
- Discussion of guidelines for critical appraisal of therapeutic evidence.
- Focus on the assessment of validity in randomized controlled trials.
Main Results:
- Guidelines for critical appraisal of RCT validity are presented.
- The importance of critically evaluating therapeutic trial methodology is emphasized.
Conclusions:
- Critical appraisal of RCT validity is fundamental for evidence-based clinical practice.
- Future articles will address the importance and applicability of RCT results.
Abstract:
One of the most compelling questions a cardiologist (and, for that matter, any clinician) has to face involves choosing the optimal management strategy for their patients. One of the best sources of information about therapy is the randomized controlled trial, which, despite several significant shortcomings, is considered to be the gold standard in studies about therapeutics and prevention. The methodological quality of therapeutic trials is highly variable and--as already discussed in previous articles--in order to be useful they have to be critically appraised in terms of the validity of their results, their importance, and their applicability to the individual patient. In this article, we will introduce guidelines for the critical appraisal of evidence in therapy, discussing the issue of validity. In future articles we will present a critical appraisal of the importance and applicability of randomized clinical trial results.