Evidence map›Paper›PMID 32910545›Full record

ArticleAnnals of clinical and translational neurology2020

LAMA2-related muscular dystrophy: Natural history of a large pediatric cohort.

Alberto A Zambon, Deborah Ridout, Marion Main, Rachael Mein, Rahul Phadke, Francesco Muntoni, Anna Sarkozy

Erratum issuedOpen access · goldAbstract read
In one paragraph

Article in Annals of clinical and translational neurology, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
2.8field-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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 61 citations in OpenAlex.

  1. Pooled it
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  4. The role of genetics and molecular mechanisms in early onset scoliosis.Journal of clinical orthopaedics and trauma · 2026
    Review
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  6. A Spectrum of Pathogenic Variants in theInternational journal of molecular sciences · 2025
    Article
  7. Article
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  9. Article
  10. Article
  11. Article
  12. Article
  13. Neurology. Genetics · 2023
    Article
  14. Article
  15. Observational
  16. Article
  17. Article
  18. Article
  19. Corrigendum.Annals of clinical and translational neurology · 2021
    Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

7 authors at 3 institutions in 3 countries.

Alberto A ZambonDubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.ORCID 0000-0002-6539-5360
Deborah RidoutDepartment of Population, Policy and Practice, UCL Institute of Child Health, London, UK.
Marion MainDubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.
Rachael MeinGenetics Department, Guy's Hospital, London, UK.
Rahul PhadkeDubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.
Francesco MuntoniDubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.
Anna SarkozyDubowitz Neuromuscular Centre, UCL Great Ormond Street Institute of Child Health & Great Ormond Street Hospital, London, UK.
Great Ormond Street Hospital · GBGuy's Hospital · GBVita-Salute San Raffaele University · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo characterize natural history of Laminin-α2 related muscular dystrophies (LAMA2-RD) to help anticipating complications and identifying reliable outcome measures for clinical trial design and powering.

methodsWe conducted a retrospective, single-center, cross-sectional and longitudinal study on 46 LAMA2-RD pediatric patients (37 families). Patients were seen at the Dubowitz Neuromuscular Centre, London between 1985 and 2019. Data were collected by case note reviews. Time-to-event analysis was performed to estimate median age at complications occurrence.

resultsForty two patients had complete deficiency of Laminin-α2 (CD) and four had partial deficiency (PD). Median age at first and last assessment was 2 years and 12.1 years, respectively. Median follow-up length was 7.8 years (range 0-18 years). Seven CD patients died at median age 12 years. One CD and two PD subjects achieved independent ambulation. We observed a linear increase in elbow flexor contractures in CD subjects. Thirty-two CD and one PD patient developed scoliosis, nine underwent spinal surgery. Twenty-two CD required nocturnal noninvasive ventilation (median age 11.7 years). CD subjects showed a 2.9% linear annual decline in forced vital capacity % predicted. Nineteen CD and one PD patient required gastrostomy insertion for failure to thrive and/or unsafe swallow (median age 10.9 years). Four CD patients had partial seizures. Mild left cardiac ventricular dysfunction and rhythm disturbances were identified in seven CD patients.

interpretationThis retrospective longitudinal study provides long-term natural history of LAMA2-RD. This will help management and identification of key milestones of disease progression that could be considered for future therapeutic intervention.

Indexed as

AdolescentChildChild, PreschoolCohort StudiesFemaleHumansInfantLamininMaleMuscle, SkeletalMuscular DystrophiesRetrospective StudiesSeizuresYoung AdultLamininlaminin alpha 2

Identifiers

PMID32910545
PMCPMC7545609
OpenAlexW3084988485

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
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.