Evidence map›Paper›PMID 36001142›Full record

Observational studyJournal of neurology2022

Generalization of ocular myasthenia gravis 10 years after onset.

Antoine Guéguen, Benoit Hijazi, Kevin Zuber, Romain Deschamps, Cedric Lamirel, Catherine Vignal-Clermont, Olivier Gout

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in Journal of neurology, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 8 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
8citing papers in PubMed, 1 pooled it
0.6field-weighted citation impact, top 31% 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

8 citing papers in PubMed, 1 synthesis or guideline pooled it, 6 citations in OpenAlex.

  1. Pooled it
  2. Review
  3. Article
  4. Article
  5. Article
  6. Review
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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 2 institutions in 1 country.

Antoine GuéguenDepartment of Neurology, Foundation Hospital A. de Rothschild, 29, Rue Manin, 75019, Paris, France. agueguen@for.paris.ORCID http://orcid.org/0000-0001-5170-5818
Benoit HijaziDepartment of Ophthalmology, Regional University Hospital Center Morvan, Brest, France.
Kevin ZuberDepartment of Clinical Research and Statistics, Foundation Hospital A. de Rothschild, Paris, France.
Romain DeschampsDepartment of Neurology, Foundation Hospital A. de Rothschild, 29, Rue Manin, 75019, Paris, France.
Cedric LamirelDepartment of Neuro-Ophthalmology, Foundation Hospital A. de Rothschild, Paris, France.
Catherine Vignal-ClermontDepartment of Neuro-Ophthalmology, Foundation Hospital A. de Rothschild, Paris, France.
Olivier GoutDepartment of Neurology, Foundation Hospital A. de Rothschild, 29, Rue Manin, 75019, Paris, France.
Fondation de Rothschild · FRCentre Hospitalier Régional Universitaire de Brest · FR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundGeneralization of ocular myasthenia gravis (OMG) represents a pejorative evolution, and no validated generalization-prevention strategy exists. The study aimed to determine the percentage of patients with OMG generalization and identify factors predictive of it to establish a prediction score.

methodsThis retrospective, observational study included 151 patients diagnosed with OMG after an initial work-up in our institution. The outcome measure was time to MG generalization. The explanatory variables were age at onset (> 55 years), sex, first-year anti-acetylcholine-receptor antibody-positivity, repetitive nerve stimulation showing electromyogram decrement and corticosteroid use. Kaplan-Meier estimations of the probability of risk of generalization, and descriptive and multivariate Cox model analyses were computed. A nomogram combining explanatory variables was used to establish a score to predict the probability of OMG generalization.

resultsAmong 183 patients' charts identified, 151 had confirmed OMG. Their median follow-up was 5.7 years. Estimations (95% CI) of OMG-generalization risk at 1, 3 and 10 years post-symptom onset, respectively, were: 13.0% (7.3-18.2), 25.1% (17.5-32.0) and 37.8% (27.2-45.2). The p-value-based multivariate analysis associated generalization with female sex, electromyogram decrement and first-year anti-acetylcholine-receptor antibody positivity, and Akaike information criterion-based analysis retained those three parameters and corticosteroid use. A nomogram was built and validated with an optimism-corrected C-statistic of 0.68, and calibration plots showed good fit.

conclusionsOur population's percentage of OMG generalization is in line with recent publications. Using the identified prognostic factors, the nomogram provided a score to predict the probable risk of generalization in our cohort.

Indexed as

Myasthenia GravisAdrenal Cortex HormonesAutoantibodiesFemaleHumansMiddle AgedReceptors, CholinergicRetrospective StudiesAdrenal Cortex HormonesAutoantibodiesReceptors, CholinergicGeneralization riskOcular myasthenia gravisPrediction scoreRetrospective observational study

Identifiers

PMID36001142
OpenAlexW4292883630

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.