Evidence map›Paper›PMID 33949801›Full record

Observational studyAnnals of clinical and translational neurology2021

Scoliosis in Friedreich's ataxia: longitudinal characterization in a large heterogeneous cohort.

Christian Rummey, John M Flynn, Louise A Corben, Martin B Delatycki, George Wilmot, Sub H Subramony, Khalaf Bushara, Antoine Duquette, Christopher M Gomez, J Chad Hoyle and 7 more

Open access · goldAbstract readMulticenter StudyObservational Study
In one paragraph

Observational study in Annals of clinical and translational neurology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed
1.8field-weighted citation impact, top 17% 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

18 citing papers in PubMed, 34 citations in OpenAlex.

  1. Review
  2. Serial assessment of echocardiographic measures in Friedreich ataxia.American heart journal plus : cardiology research and practice · 2026
    Article
  3. Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Review
  9. Review
  10. Article
  11. Pulling back the mitochondria's iron curtain.npj metabolic health and disease · 2025
    Review
  12. Article
  13. Article
  14. Review
  15. Friedreich ataxia: clinical features and new developments.Neurodegenerative disease management · 2022
    Review
  16. Respiratory Function in Friedreich's Ataxia.Children (Basel, Switzerland) · 2022
    Article
  17. Article
  18. 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

17 authors at 15 institutions in 5 countries.

Christian RummeyClinical Data Science GmbH, Basel, Switzerland.ORCID 0000-0003-4911-911X
John M FlynnDivision of Orthopedics, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.
Louise A CorbenBruce Lefroy Centre for Genetic Health Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia.
Martin B DelatyckiBruce Lefroy Centre for Genetic Health Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia.
George WilmotEmory University, Atlanta, Georgia, USA.
Sub H SubramonyDepartment of Neurology, McKnight Brain Institute, Gainesville, Florida, USA.ORCID 0000-0002-8052-9240
Khalaf BusharaUniversity of Minnesota, Minneapolis, Minnesota, USA.
Antoine DuquetteDepartment of Neurosciences, University of Montreal Hospital Research Center, Montreal, Quebec, Canada.
Christopher M GomezUniversity of Chicago, Chicago, Illinois, USA.
J Chad HoyleOhio State University, Columbus, Ohio, USA.
Richard RoxburghUniversity of Auckland, Auckland, New Zealand.
Lauren SeebergerUniversity of Colorado, Boulder, Colorado, USA.
Grace YoonDivisions of Neurology and Clinical and Metabolic Genetics, Department of Paediatrics, The Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada.
Katherine D MathewsCarver College of Medicine, University of Iowa, Iowa City, Iowa, USA.
Theresa ZesiewiczUniversity of South Florida, Tampa, Florida, USA.
Susan PerlmanUniversity of California Los Angeles, Los Angeles, California, USA.
David R LynchDivision of Neurology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.ORCID 0000-0001-7168-214X
Children's Hospital of Philadelphia · USThe University of Melbourne · AUAllen Institute for Brain Science · USEmory University · USMontreal General Hospital · CASwiss Data Science Center · CHThe Ohio State University · USUniversity of Auckland · NZUniversity of California, Los Angeles · USUniversity of Chicago · USUniversity of Colorado Boulder · USUniversity of Iowa · USUniversity of Minnesota · USUniversity of South Florida · USUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveThe objective of this study was to characterize the incidence and progression of scoliosis in the natural history of Friedreich's ataxia (FRDA) and document the factors leading to the requirement for corrective surgery.

methodsData on the prevalence of scoliosis and scoliosis surgery from up to 17 years of follow-up collected during a large natural history study in FRDA (1116 patients at 4928 visits) were summarized descriptively and subjected to time to event analyses.

resultsWell over 90% of early or typical FRDA patients (as determined by age of onset) developed intermediate to severe scoliosis, while patients with a later onset (>14 years) had no or much lower prevalence of scoliosis. Diagnosis of scoliosis occurs during the onset of ataxia and in rare cases even prior to that. Major progression follows throughout the growth phase and puberty, leading to the need for surgical intervention in more than 50% of individuals in the most severe subgroup. The youngest patients appear to delay surgery until the end of the growth period, leading to further progression before surgical intervention. Age of onset of FRDA before or after reaching 15 years sharply separated severe and relatively mild incidence and progression of scoliosis.

interpretationScoliosis is an important comorbidity of FRDA. Our comprehensive documentation of scoliosis progression in this natural history study provides a baseline for comparison as novel treatments become available.

Indexed as

AdolescentAdultAge of OnsetChildDisease ProgressionFriedreich AtaxiaHumansLongitudinal StudiesMiddle AgedPrevalenceScoliosisYoung Adult

Identifiers

PMID33949801
PMCPMC8164850
OpenAlexW3157578986

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.