Evidence map›Paper›PMID 35357731›Full record

ArticleEuropean journal of pain (London, England)2022

Mechanism underlying painful radiculopathy in patients with lumbar disc herniation.

Gil Samuelly-Leichtag, Elon Eisenberg, Yaniv Zohar, Maisa Andraous, Ayelet Eran, Gill E Sviri, Ory Keynan

Open access · hybridAbstract read
In one paragraph

Article in European journal of pain (London, England), 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
3.8field-weighted citation impact, top 7% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

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  20. Unraveling the PVNMolecular pain
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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

7 authors at 2 institutions in 1 country.

Gil Samuelly-LeichtagB. Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.ORCID 0000-0002-8585-9898
Elon EisenbergB. Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.
Yaniv ZoharB. Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.ORCID 0000-0002-5909-609X
Maisa AndraousMedical Imaging Division, Rambam Health Care Campus, Haifa, Israel.
Ayelet EranB. Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.ORCID 0000-0003-1439-7881
Gill E SviriB. Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.
Ory KeynanDivision of Spine Surgery, Department of Orthopedics, Rambam Health Care Campus, Haifa, Israel.ORCID 0000-0002-7817-1315
Technion – Israel Institute of Technology · ILRambam Health Care Campus · IL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundPainful lumbar radiculopathy is a neuropathic pain condition, commonly attributed to nerve root inflammation/compression by disc herniation. The present exploratory study searched for associations between pain intensity and inflammatory markers, herniated disc size, infection, psychological factors and pain modulation in patients with confirmed painful lumbar radiculopathy scheduled for spine surgery.

methodsPrior to surgery, 53 patients underwent the following evaluation: pain intensity measured on a 0-10 numeric rating scale (NRS) and the Short-Form McGill Pain Questionnaire; sensory testing (modified DFNS protocol); pain processing including temporal summation and conditioned pain modulation (CPM); neurological examination; psychological assessment including Spielberger's Anxiety Inventory, Pain Sensitivity Questionnaire and the Pain Catastrophizing Scale. Pro-inflammatory cytokine levels (IL-1b, IL-6, IL-8, IL-17, TNFα, IFNg) and microbial infection (ELISA and rt-PCR) in blood and disc samples obtained during surgery. MRI scans assessments for disc herniation size/volume (MSU classification/ three-dimensional volumetric analysis).

resultsComplete data were available from 40 (75%) patients (15 female) aged 44.8 ± 16.3 years. Pain intensity (NRS) positively correlated with pain catastrophizing and CPM (r = 0.437, p = 0.006; r = 0.421, p = 0.007; respectively), but not with disc/blood cytokine levels, bacterial infection or MRI measures. CPM (p = 0.001) and gender (p = 0.029) were associated with average pain intensity (adjusted R

conclusionsThis exploratory study suggests that pain catastrophizing, CPM and gender, seem to contribute to pain intensity in patients with painful lumbar radiculopathy. The role of mechanical compression and inflammation in determining the intensity of painful radiculopathy remains obscure. SIGNIFICANCE OF STUDY: Pain catastrophizing, CPM and gender rather than objective measures of inflammation and imaging seem to contribute to pain in patients with painful radiculopathy.

Indexed as

Intervertebral Disc DisplacementRadiculopathyCytokinesFemaleHumansInflammationLumbar VertebraePainCytokines

Identifiers

PMID35357731
PMCPMC10083974
OpenAlexW4221009981

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LicenceCC BY
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Registered trials

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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.