Evidence map›Paper›PMID 34022943›Full record

SynthesisOrphanet journal of rare diseases2021

The clinical course of Duchenne muscular dystrophy in the corticosteroid treatment era: a systematic literature review.

Shelagh M Szabo, Renna M Salhany, Alison Deighton, Meagan Harwood, Jean Mah, Katherine L Gooch

Open access · goldAbstract readSystematic 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 66 papers.

0numbers the graph read from it
0cells of the map it votes in
66citing papers in PubMed
7.3field-weighted citation impact, top 2% 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

66 citing papers in PubMed, 121 citations in OpenAlex.

  1. Trial
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  10. CRISPR-Cas9-mediated upregulation of utrophin ameliorates Duchenne muscular dystrophy.Molecular therapy : the journal of the American Society of Gene Therapy · 2026
    Article
  11. Article
  12. The burden of bone disease in Duchenne muscular dystrophy: age-specific prevalence of osteoporosis and low bone density.Osteoporosis international : a journal established as result of cooperation between the European Foundation for Osteoporosis and the National Osteoporosis Foundation of the USA · 2026
    Article
  13. Article
  14. X-Linked Muscular Dystrophy in a Cat with a Putative Variant in theAnimals : an open access journal from MDPI · 2026
    Article
  15. Article
  16. Article
  17. Article
  18. Dose- and genotype-dependent cardiac arrhythmia and sudden death in rats following microdystrophin gene therapy.Molecular therapy : the journal of the American Society of Gene Therapy · 2026
    Article
  19. Review
  20. Observational

6 more citing papers are in PubMed but not listed here.

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

6 authors at 3 institutions in 2 countries.

Shelagh M SzaboBroadstreet HEOR, 201 - 343 Railway St, Vancouver, BC, V6A 1A4, Canada. sszabo@broadstreetheor.com.ORCID 0000-0002-9044-3192
Renna M SalhanySarepta Therapeutics, 215 First St, Cambridge, MA, 02142, USA.
Alison DeightonBroadstreet HEOR, 201 - 343 Railway St, Vancouver, BC, V6A 1A4, Canada.
Meagan HarwoodBroadstreet HEOR, 201 - 343 Railway St, Vancouver, BC, V6A 1A4, Canada.
Jean MahCumming School of Medicine, University of Calgary, Calgary, AB, Canada.
Katherine L GoochSarepta Therapeutics, 215 First St, Cambridge, MA, 02142, USA.
Vancouver Coastal Health · CASarepta Therapeutics (United States) · USUniversity of Calgary · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundDuchenne muscular dystrophy (DMD) is a severe rare progressive inherited neuromuscular disorder, leading to loss of ambulation (LOA) and premature mortality. The standard of care for patients with DMD has been treatment with corticosteroids for the past decade; however a synthesis of contemporary data describing the clinical course of DMD is lacking. The objective was to summarize age at key clinical milestones (loss of ambulation, scoliosis, ventilation, cardiomyopathy, and mortality) in the corticosteroid-treatment-era.

methodsA systematic review was conducted using MEDLINE and EMBASE. The percentage experiencing key clinical milestones, and the mean or median age at those milestones, was synthesized from studies from North American populations, published between 2007 and 2018.

resultsFrom 5637 abstracts, 29 studies were included. Estimates of the percentage experiencing key clinical milestones, and age at those milestones, showed heterogeneity. Up to 30% of patients lost ambulation by age 10 years, and up to 90% by 15 years of age. The mean age at scoliosis onset was approximately 14 years. Ventilatory support began from 15 to 18 years, and up to half of patients required ventilation by 20 years of age. Registry-based estimates suggest that 70% had evidence of cardiomyopathy by 15 years and almost all by 20 years of age. Finally, mortality rates up to 16% by age 20 years were reported; among those surviving to adulthood mortality was up to 60% by age 30 years.

conclusionsContemporary natural history studies from North America report that LOA on average occurs in the early teens, need for ventilation and cardiomyopathy in the late teens, and death in the third or fourth decade of life. Variability in rates may be due to differences in study design, treatment with corticosteroids or other disease-modifying agents, variations in clinical practices, and dystrophin mutations. Despite challenges in synthesizing estimates, these findings help characterize disease progression among contemporary North American DMD patients.

Indexed as

CardiomyopathiesMuscular Dystrophy, DuchenneAdolescentAdrenal Cortex HormonesAdultChildDisease ProgressionDystrophinHumansYoung AdultAdrenal Cortex HormonesDystrophinClinical courseDMDDuchenne muscular dystrophyLoss of ambulationSystematic review

Identifiers

PMID34022943
PMCPMC8141220
OpenAlexW3165587716

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.