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Blinding in Surgical Randomized Clinical Trials in 2015
1*Basel Institute for Clinical Epidemiology and Biostatistics, Department of Clinical Research, University Hospital Basel, University of Basel, Basel, Switzerland †Department of Surgery, Cantonal Hospital Baselland, Liestal, Switzerland.
Annals of Surgery
|March 29, 2017
Summary
Blinding is crucial in surgical randomized trials to prevent bias. This review found that reporting of blinding in surgical trials is often unclear, potentially affecting study reliability.
Area of Science:
- Clinical Trials
- Surgical Research
- Evidence-Based Medicine
Background:
- Blinding in randomized clinical trials (RCTs) is essential for minimizing bias in effect estimates.
- Nonpharmacological interventions, particularly surgical trials, present unique challenges to implementing effective blinding.
- Inconsistent reporting of blinding can compromise the internal validity and interpretability of research findings.
Purpose of the Study:
- To assess the status and reporting of blinding in surgical randomized clinical trials (RCTs) published in leading medical and surgical journals in 2015.
- To identify the extent to which practitioners, patients, and outcome observers were blinded in these trials.
- To highlight deficiencies in the reporting of blinding to encourage improvement in scientific communication.
Main Methods:
- A systematic literature search was conducted on PubMed to identify relevant surgical RCTs published in 2015.
- A total of 99 studies were included for analysis.
- The blinding status for practitioners, patients, and outcome observers was explicitly assessed and categorized.
Main Results:
- Explicit reporting of blinding was low for practitioners (3%) and moderate for patients (37%) and outcome observers (52%).
- A significant proportion of studies failed to clearly state the blinding status.
- Some studies exhibited misleading classifications of blinding, further obscuring the true extent of blinding.
- The overall reporting of blinding in surgical RCTs was found to be inadequate.
Conclusions:
- The lack of unambiguous reporting on blinding in surgical RCTs is a significant concern.
- Authors and journal editors must prioritize clear and accurate reporting of blinding status in all RCTs.
- Improved transparency in blinding reporting is necessary to enhance the reliability and validity of surgical research.
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