Evidence map›Paper›PMID 34202486›Full record

ReviewMedicina (Kaunas, Lithuania)2021

Blinding in Clinical Trials: Seeing the Big Picture.

Thomas F Monaghan, Christina W Agudelo, Syed N Rahman, Alan J Wein, Jason M Lazar, Karel Everaert, Roger R Dmochowski

Open access · goldAbstract readReview
In one paragraph

Review in Medicina (Kaunas, Lithuania), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 58 papers, 9 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
58citing papers in PubMed, 9 pooled it
6.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

58 citing papers in PubMed, 9 syntheses or guidelines pooled it, 126 citations in OpenAlex.

  1. Pooled it
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  3. Systematic review of changes in extracellular vesicles associated with obstructive sleep apnoea: implications for diagnosis and treatment.European respiratory review : an official journal of the European Respiratory Society · 2025
    Pooled it
  4. The Effect of Health Literacy Interventions on Self-management in Chronic Diseases: A Systematic Review.Annals of behavioral medicine : a publication of the Society of Behavioral Medicine · 2025
    Pooled it
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  10. Trial
  11. Effectiveness of hypnotherapy for paediatric abdominal pain in primary care: a randomised controlled trial.The British journal of general practice : the journal of the Royal College of General Practitioners · 2026
    Trial
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 6 institutions in 2 countries.

Thomas F MonaghanDepartment of Urology, University of Texas Southwestern Medical Center, Dallas, TX 75390, USA.ORCID 0000-0002-5236-0783
Christina W AgudeloDivision of Cardiovascular Medicine, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA.ORCID 0000-0002-9633-0308
Syed N RahmanDepartment of Urology, Yale University School of Medicine, New Haven, CT 06520, USA.
Alan J WeinDivision of Urology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA 19104, USA.
Jason M LazarDivision of Cardiovascular Medicine, Department of Medicine, SUNY Downstate Health Sciences University, Brooklyn, NY 11203, USA.ORCID 0000-0002-8548-7932
Karel EveraertDepartment of Human Structure and Repair, Ghent University, 9000 Ghent, Belgium.ORCID 0000-0001-7173-2039
Roger R DmochowskiDepartment of Urological Surgery, Vanderbilt University Medical Center, Nashville, TN 37232, USA.
SUNY Downstate Health Sciences University · USGhent University · BEThe University of Texas Southwestern Medical Center · USUniversity of Pennsylvania · USVanderbilt University Medical Center · USYale University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Blinding mitigates several sources of bias which, if left unchecked, can quantitively affect study outcomes. Blinding remains under-utilized, particularly in non-pharmaceutical clinical trials, but is often highly feasible through simple measures. Although blinding is generally viewed as an effective method by which to eliminate bias, blinding does also pose some inherent limitations, and it behooves clinicians and researchers to be aware of such caveats. This article will review general principles for blinding in clinical trials, including examples of useful blinding techniques for both pharmaceutical and non-pharmaceutical trials, while also highlighting the limitations and potential consequences of blinding. Appropriate reporting on blinding in trial protocols and manuscripts, as well as future directions for blinding research, will also be discussed.

Indexed as

Single-Blind MethodBiasDouble-Blind MethodHumansbiasblindingclinical trialsdoublesingletriple

Identifiers

PMID34202486
PMCPMC8308085
OpenAlexW3175462489

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.