Evidence map›Paper›PMID 35128124›Full record

ArticleJournal of spine surgery (Hong Kong)2021

Imaging diagnosis of lumbar foraminal stenosis in the fifth lumbar nerve root: reliability and reproducibility of T1-weighted three-dimensional lumbar MRI.

Ko Hashimoto, Yasuhisa Tanaka, Takumi Tsubakino, Takeshi Hoshikawa, Tomowaki Nakagawa, Takashi Inawashiro, Kohei Takahashi, Masaru Suda, Toshimi Aizawa

Open access · diamondAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Journal of spine surgery (Hong Kong), 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed, 1 pooled it
1.1field-weighted citation impact, top 24% 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

5 citing papers in PubMed, 1 synthesis or guideline pooled it, 8 citations in OpenAlex.

  1. Pooled it
  2. Article
  3. Article
  4. Article
  5. Accuracy of Coronal Magnetic Resonance Imaging Diagnosis of Multi-Segmental Lumbar Disc Herniation: A Single-Center Retrospective Analysis.Medical science monitor : international medical journal of experimental and clinical research · 2023
    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

9 authors at 3 institutions in 1 country.

Ko HashimotoDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Yasuhisa TanakaDepartment of Orthopaedic Surgery, Tohoku Central Hospital, Yamagata, Japan.
Takumi TsubakinoDepartment of Orthopaedic Surgery, Tohoku Central Hospital, Yamagata, Japan.
Takeshi HoshikawaDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Tomowaki NakagawaDepartment of Orthopaedic Surgery, Sendai Orthopaedic Hospital, Sendai, Japan.
Takashi InawashiroDepartment of Orthopaedic Surgery, Sendai City Hospital, Sendai, Japan.
Kohei TakahashiDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Masaru SudaDepartment of Radiology, Tohoku Central Hospital, Yamagata, Japan.
Toshimi AizawaDepartment of Orthopaedic Surgery, Tohoku University Graduate School of Medicine, Sendai, Japan.
Tohoku University · JPSendai Shakai Hoken Hospital · JPSendai City Hospital · JP

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundVarious magnetic resonance imaging (MRI) techniques have been reported in detection of lumbar foraminal stenosis (LFS), especially for T2-weighted three-dimensional MRI (3D-MRI) describing the shape of nerve roots. The detection of LFS in the fifth lumbar nerve root (L5 root), however, is still less reliable compared to other lumbar nerve roots. Then we have been using T1-weighted 3D-MRI aiming to depict the shape of, and also pathology affecting the L5 root. The aim of this study is to evaluate our T1-weighted 3D-MRI in diagnosing LFS of the L5 root.

methodsThis retrospective study included 24 patients with intracanal stenosis (ICS) at L4-5, and 30 patients with LFS at L5-S causing unilateral L5 root lesion. The pre-operative T1-weighted 3D-MRI aiming bilateral L5 nerve roots of each patient were blinded and reviewed twice by five spine surgeons, independently. The image evaluation was performed in two conditions: (I) the symptomatic side was judged in 30 patients of LFS patients, and (II) the symptomatic side or the absence of LFS was judged in images of all the 54 patients including LFS and ICS patients. The correct-answer-rate, sensitivity and specificity of the imaging study were calculated. Also, the intra- and interobserver agreement of the imaging study by five spine surgeons were evaluated by the kappa (κ) statistics.

resultsFor conditions (I) and (II) above, the mean correct-answer-rate was 92.3% and 69.8%, respectively. The sensitivity and specificity of the imaging study was 72.6% and 66.3%, respectively. The average of intraobserver κ-value of five examiners was 0.874 and 0.708, and the average of interobserver κ-value was 0.837 and 0.578, respectively.

conclusionsAs well as previously reported T2-weighted 3D-MRI, our T1-weighted 3D-MRI was found to be reliable in diagnosing LFS of the L5 root.

Indexed as

fifth lumbar nerve root (L5 root)interobserver agreementintraobserver agreementLumbar foraminal stenosis (LFS)reliabilityreproducibilityT1-weighted imagesthree-dimensional magnetic resonance imaging (3D-MRI)

Identifiers

PMID35128124
PMCPMC8743287
OpenAlexW3201286789

What OpenQuestion holds

Textmetadata
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.