Evidence map›Paper›PMID 34399803›Full record

SynthesisOrphanet journal of rare diseases2021

Natural history of Lafora disease: a prognostic systematic review and individual participant data meta-analysis.

Federica Pondrelli, Lorenzo Muccioli, Laura Licchetta, Barbara Mostacci, Corrado Zenesini, Paolo Tinuper, Luca Vignatelli, Francesca Bisulli

Abstract readMeta-AnalysisSystematic Review
In one paragraph

Synthesis in Orphanet journal of rare diseases, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 36 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
36citing papers in PubMed, 1 pooled it
–field-weighted citation impact
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

36 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
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  15. Dapagliflozin ameliorates Lafora disease phenotype in a zebrafish model.Biomedicine & pharmacotherapy = Biomedecine & pharmacotherapie · 2025
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  18. Gene therapy for Lafora disease in the Epm2aMolecular therapy : the journal of the American Society of Gene Therapy · 2024
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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

8 authors.

Federica PondrelliDipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy.
Lorenzo MuccioliDipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy.
Laura LicchettaIRCCS Istituto delle Scienze Neurologiche di Bologna, Full Member of the ERN EpiCARE, Bologna, Italy.
Barbara MostacciIRCCS Istituto delle Scienze Neurologiche di Bologna, Full Member of the ERN EpiCARE, Bologna, Italy.
Corrado ZenesiniIRCCS Istituto delle Scienze Neurologiche di Bologna, Full Member of the ERN EpiCARE, Bologna, Italy.
Paolo TinuperDipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy.
Luca Vignatelli *IRCCS Istituto delle Scienze Neurologiche di Bologna, Full Member of the ERN EpiCARE, Bologna, Italy.
Francesca Bisulli *Dipartimento di Scienze Biomediche e Neuromotorie, Università di Bologna, Bologna, Italy. francesca.bisulli@unibo.it.ORCID 0000-0002-1109-7296

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundLafora disease (LD) is a rare fatal autosomal recessive form of progressive myoclonus epilepsy. It affects previously healthy children or adolescents, causing pharmacoresistant epilepsy, myoclonus and severe psychomotor deterioration. This work aims to describe the clinical course of LD and identify predictors of outcome by means of a prognostic systematic review with individual participant data meta-analysis.

methodsA search was conducted on MEDLINE and Embase with no restrictions on publication date. Only studies reporting genetically confirmed LD cases were included. Kaplan-Meier estimate was used to assess probability of death and loss of autonomy. Univariable and multivariable Cox regression models with mixed effects (clustered survival data) were performed to evaluate prognostic factors.

resultsSeventy-three papers describing 298 genetically confirmed LD cases were selected. Mean age at disease onset was 13.4 years (SD 3.7), with 9.1% aged ≥ 18 years. Overall survival rates in 272 cases were 93% [95% CI 89-96] at 5 years, 62% [95% CI 54-69] at 10 years and 57% [95% CI 49-65] at 15 years. Median survival time was 11 years. The probability of loss of autonomy in 110 cases was 45% [95% CI 36-55] at 5 years, 75% [95% CI 66-84] at 10 years, and 83% [95% CI 74-90] at 15 years. Median loss of autonomy time was 6 years. Asian origin and age at onset < 18 years emerged as negative prognostic factors, while type of mutated gene and symptoms at onset were not related to survival or disability.

conclusionsThis study documented that half of patients survived at least 11 years. The notion of actual survival rate and prognostic factors is crucial to design studies on the effectiveness of upcoming new disease-modifying therapies.

Indexed as

Lafora DiseaseAdolescentChildHumansPrognosis

Identifiers

PMID34399803
PMCPMC8365996

What OpenQuestion holds

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Registered trials

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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.