Evidence map›Paper›PMID 30270202›Full record

ArticleJournal of neurology, neurosurgery, and psychiatry2019

Younger age of onset in familial amyotrophic lateral sclerosis is a result of pathogenic gene variants, rather than ascertainment bias.

Puja R Mehta, Ashley R Jones, Sarah Opie-Martin, Aleksey Shatunov, Alfredo Iacoangeli, Ahmad Al Khleifat, Bradley N Smith, Simon Topp, Karen E Morrison, Pamela J Shaw and 4 more

Abstract read
In one paragraph

Article in Journal of neurology, neurosurgery, and psychiatry, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 28 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
28citing papers in PubMed, 2 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

28 citing papers in PubMed, 2 syntheses or guidelines pooled it.

  1. Human tissue lead (Pb) levels and amyotrophic lateral sclerosis: a systematic review and meta-analysis of case-control studies.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2022
    Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. Review
  11. Role of Senataxin in Amyotrophic Lateral Sclerosis.Journal of molecular neuroscience : MN · 2023
    Review
  12. Article
  13. Article
  14. Article
  15. Observational
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

14 authors.

Puja R MehtaDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.ORCID 0000-0002-0255-407X
Ashley R JonesDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Sarah Opie-MartinDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Aleksey ShatunovDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Alfredo IacoangeliDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Ahmad Al KhleifatDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Bradley N SmithDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Simon ToppDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK.
Karen E MorrisonFaculty of Medicine, University of Southampton, University Hospital Southampton NHS Foundation Trust, Southampton, UK.
Pamela J ShawSheffield Institute for Translational Neuroscience (SITraN), University of Sheffield, Sheffield, UK.
Christopher E ShawDepartment of Neurology, King's College Hospital, Denmark Hill, London, UK.
Sarah MorganDepartment of Molecular Neuroscience, Institute of Neurology, UCL, Queen Square, London, UK.
Alan PittmanDepartment of Molecular Neuroscience, Institute of Neurology, UCL, Queen Square, London, UK.
Ammar Al-ChalabiDepartment of Basic and Clinical Neuroscience, Maurice Wohl Clinical Neuroscience Institute, King's College London, London, UK ammar.al-chalabi@kcl.ac.uk.

Funding

Medical Research Council G0500289Medical Research Council G0600974Medical Research Council MR/L021803/1Medical Research Council MR/L501529/1Medical Research Council MR/R024804/1Motor Neurone Disease Association AL-CHALABI/APR15/844-791Motor Neurone Disease Association ALCHALABI-DOBSON/APR14/829-791Motor Neurone Disease Association ALCHALABI-TALBOT/APR14/926-794Motor Neurone Disease Association JONES/OCT15/958-799Motor Neurone Disease Association SHAW/APR15/933-794Motor Neurone Disease Association SHAW/NOV14/985-797Motor Neurone Disease Association SMITH/APR16/847-791Motor Neurone Disease Association SMITH/OCT16/888-792MRF_ MRF-060-0003-RG-SMITHWellcome Trust
6 · The paper itself

Abstract

objectiveAmyotrophic lateral sclerosis (ALS) is a rapidly progressive neurodegenerative disease of motor neurons with a median survival of 2 years. Familial ALS has a younger age of onset than apparently sporadic ALS. We sought to determine whether this younger age of onset is a result of ascertainment bias or has a genetic basis.

methodsSamples from people with ALS were sequenced for 13 ALS genes. To determine the effect of genetic variation, age of onset was compared in people with sporadic ALS carrying a pathogenic gene variant and those who do not; to determine the effect of family history, we compared those with genetic sporadic ALS and familial ALS.

resultsThere were 941 people with a diagnosis of ALS, 100 with familial ALS. Of 841 with apparently sporadic ALS, 95 carried a pathogenic gene variant. The mean age of onset in familial ALS was 5.3 years younger than for apparently sporadic ALS (p=6.0×10

conclusionsPeople with familial ALS have an age of onset about 5 years younger than those with apparently sporadic ALS, and we have shown that this is a result of Mendelian gene variants lowering the age of onset, rather than ascertainment bias.

Indexed as

AdultAgedAge of OnsetAmyotrophic Lateral SclerosisBiasDatabases, Nucleic AcidFemaleGenetic VariationHumansMaleMiddle AgedUnited Kingdom

Identifiers

PMID30270202
PMCPMC6518463

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.