Evidence map›Paper›PMID 23771487›Full record

ArticleNeurology2013

Development and validation of a clinical guideline for diagnosing blepharospasm.

Giovanni Defazio, Mark Hallett, Hyder A Jinnah, Alfredo Berardelli

Abstract readValidation Study
In one paragraph

Article in Neurology, 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 50 papers.

0numbers the graph read from it
0cells of the map it votes in
50citing papers in PubMed
3.5field-weighted citation impact, top 8% 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

50 citing papers in PubMed, 100 citations in OpenAlex.

  1. An Exploratory, Randomized, Double-Blind Clinical Trial of Dipraglurant for Blepharospasm.Movement disorders : official journal of the Movement Disorder Society · 2024
    Trial
  2. Neuropathic Corneal Pain and Blepharospasm: A Case Series.Diagnostics (Basel, Switzerland) · 2026
    Article
  3. A scoping review about the efficacy of clonazepam for the treatment of benign essential blepharospasm.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Article
  4. Article
  5. Article
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  8. Article
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  11. Lesion-Induced Blepharospasm: Epidemiology and Clinical Characteristics.Tremor and other hyperkinetic movements (New York, N.Y.) · 2025
    Article
  12. Radiological characteristics predicting early poor drug response in patients with hemifacial spasm.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2024
    Article
  13. Dystonia (Lausanne, Switzerland) · 2024
    Article
  14. Article
  15. Article
  16. Eye-Closure Rate Modulation in Blepharospasm.Tremor and other hyperkinetic movements (New York, N.Y.) · 2023
    Article
  17. Article
  18. Tremor and other hyperkinetic movements (New York, N.Y.) · 2023
    Article
  19. Article
  20. Article
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

4 authors at 2 institutions in 1 country.

Giovanni DefazioDepartment of Basic Medical Sciences, Neurosciences and Sense Organs, Aldo Moro University of Bari, Italy. gdefazio@neurol.uniba.it
Mark Hallett
Hyder A Jinnah
Alfredo Berardelli
Emory University · USNational Institute of Neurological Disorders and Stroke · US

Funding

Pathophysiology of Basal Ganglia DisordersZIANS003031 · NINDS · NATIONAL INSTITUTE OF NEUROLOGICAL DISORDERS AND STROKE · PI HALLETT, MARK · 2009 to 2023
$22.7M
Dystonia CoalitionU54NS065701 · NINDS · EMORY UNIVERSITY · PI JINNAH, HYDER A · 2009 to 2014
$7.0M
Dystonia CoalitionU54TR001456 · NCATS · EMORY UNIVERSITY · PI JINNAH, HYDER A · 2015 to 2016
$2.5M
NCATS NIH HHS U54 TR001456NINDS NIH HHS NS065701
6 · The paper itself

Abstract

objectiveTo design and validate a clinical diagnostic guideline for aiding physicians in confirming or refuting suspected blepharospasm.

methodsThe guideline was developed and validated in a 3-step procedure: 1) identification of clinical items related to the phenomenology of blepharospasm, 2) assessment of the relevance of each item to the diagnosis of blepharospasm, and 3) evaluation of the reliability and diagnostic sensitivity/specificity of the selected clinical items.

resultsOf 19 clinical items initially identified, 7 were admitted by content validity analysis to further assessment. Both neurologists and ophthalmologists achieved satisfactory interobserver agreement for all 7 items, including "involuntary eyelid narrowing/closure due to orbicularis oculi spasms," "bilateral spasms," "synchronous spasms," "stereotyped spasm pattern," "sensory trick," "inability to voluntarily suppress the spasms," and "blink count at rest." Each selected item yielded unsatisfactory accuracy in discriminating patients with blepharospasm from healthy subjects and patients with other eyelid disturbances. Combining the selected items, however, improved diagnostic sensitivity/specificity. The best combination, yielding 93% sensitivity and 90% specificity, was an algorithm starting with the item "stereotyped, bilateral, and synchronous orbicularis oculi spasms inducing eyelid narrowing/closure" and followed by recognition of "sensory trick" or, alternatively, "increased blinking."

conclusionThis study provides an accurate and valid clinical guideline for diagnosing blepharospasm. Use of this guideline would make it easier for providers to recognize dystonia in clinical and research settings.

Indexed as

BlinkingPhysical ExaminationAgedBlepharospasmFemaleHumansMaleMiddle AgedPractice Guidelines as TopicReproducibility of ResultsSensitivity and Specificity

Identifiers

PMID23771487
PMCPMC3770163
OpenAlexW2015458477

What OpenQuestion holds

Textmetadata
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.