Evidence map›Paper›PMID 34686721›Full record

SynthesisScientific reports2021

Meta-analysis of the normal diffusion tensor imaging values of the median nerve and how they change in carpal tunnel syndrome.

Djamila Rojoa, Firas Raheman, Joseph Rassam, Ryckie G Wade

Open access · goldAbstract readMeta-AnalysisReview
In one paragraph

Synthesis in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 2 pooled it
1.9field-weighted citation impact, top 14% 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

16 citing papers in PubMed, 2 syntheses or guidelines pooled it, 23 citations in OpenAlex.

  1. White matter abnormalities in tuberous sclerosis complex: a systematic review of diffusion tensor imaging studies.Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology · 2026
    Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Review
  15. Article
  16. 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

4 authors at 2 institutions in 1 country.

Djamila RojoaDepartment of Plastic and Reconstructive Surgery, Leicester Royal Infirmary, Leicester, UK.ORCID http://orcid.org/0000-0002-0082-3395
Firas RahemanDepartment of Plastic and Reconstructive Surgery, Leicester Royal Infirmary, Leicester, UK.ORCID http://orcid.org/0000-0001-7374-7015
Joseph RassamDepartment of Plastic and Reconstructive Surgery, Leicester Royal Infirmary, Leicester, UK.ORCID http://orcid.org/0000-0002-9175-9383
Ryckie G WadeDepartment of Plastic and Reconstructive Surgery, Leeds Teaching Hospitals Trust, Leeds, UK. ryckiewade@gmail.com.ORCID http://orcid.org/0000-0001-8365-6547
Leicester Royal Infirmary · GBUniversity of Leeds · GB

Funding

Department of Health DRF-2018-11-ST2-028
6 · The paper itself

Abstract

Carpal tunnel syndrome (CTS) leads to distortion of axonal architecture, demyelination and fibrosis within the median nerve. Diffusion tensor imaging (DTI) characterises tissue microstructure and generates reproducible proxy measures of nerve 'health' which are sensitive to myelination, axon diameter, fiber density and organisation. This meta-analysis summarises the normal DTI values of the median nerve, and how they change in CTS. This systematic review included studies reporting DTI of the median nerve at the level of the wrist in adults. The primary outcome was to determine the normal fractional anisotropy (FA) and mean diffusivity (MD) of the median nerve. Secondarily, we show how the FA and MD differ between asymptomatic adults and patients with CTS, and how these differences are independent of the acquisition methods. We included 32 studies of 2643 wrists, belonging to 1575 asymptomatic adults and 1068 patients with CTS. The normal FA was 0.58 (95% CI 0.56, 0.59) and the normal MD was 1.138 × 10

Indexed as

Carpal Tunnel SyndromeDiffusion Magnetic Resonance ImagingDiffusion Tensor ImagingHumansMedian NerveReference ValuesWrist Joint

Identifiers

PMID34686721
PMCPMC8536657
OpenAlexW3206438556

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.