Evidence map›Paper›PMID 34246250›Full record

ArticleBMC musculoskeletal disorders2021

Analysis of risk factors for C5 nerve root paralysis after posterior cervical decompression.

Bo Liu, Yanchen Chu, Jinfeng Ma, Xiaojie Tang, Junpeng Pan, Chunbing Wu, Xiao Chen, Chengliang Zhao, Zhijie Wang

Abstract read
In one paragraph

Article in BMC musculoskeletal disorders, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
7citing papers in PubMed, 1 pooled it
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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

7 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Pooled it
  2. Machine learning and neural network algorithms for prediction of C5 palsy after posterior surgery for ossification of posterior longitudinal ligament.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2026
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  7. [Cause analysis and clinical intervention of CZhongguo xiu fu chong jian wai ke za zhi = Zhongguo xiufu chongjian waike zazhi = Chinese journal of reparative and reconstructive surgery · 2024
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4 · The record

Corrections and comments

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5 · Who and what money

Authors and funding

9 authors.

Bo Liu *Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Yanchen Chu *Department of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Jinfeng MaDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Xiaojie TangDepartment of Spinal Surgery, Yantai Affiliated Hospital of Binzhou Medical University, 264100, Yantai, Shandong Province, China.
Junpeng PanDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Chunbing WuDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Xiao ChenDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China.
Chengliang ZhaoDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China. 38221965@qq.com.
Zhijie WangDepartment of Spinal Surgery, The Affiliated Hospital of Qingdao University, 266071, Qingdao, Shandong Province, China. simonwang1969@163.com.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundC5 nerve root paralysis is a nonnegligible complication after posterior cervical spine surgery (PCSS). The cause of its occurrence remains controversial. The purpose of this study was to analyse the incidence of and risk factors for C5 nerve root paralysis after posterior cervical decompression.

methodsWe retrospectively analysed the clinical data of 640 patients who underwent PCSS in the Department of Orthopaedics, Affiliated Hospital of Qingdao University from September 2013 to September 2019. According to the status of C5 nerve root paralysis after surgery, all patients were divided into paralysis and normal groups. Univariate and multivariate analyses were used to determine the independent risk factors for C5 nerve root paralysis. A receiver operating characteristic (ROC) curve was used to demonstrate the discrimination of all independent risk factors.

resultsMultivariate logistic regression analysis revealed that male sex, preoperative cervical spine curvature, posterior longitudinal ligament ossification, and preoperative C4/5 spinal cord hyperintensity were independent risk factors for paralysis, whereas the width of the intervertebral foramina was an independent protective factor for paralysis. The area under the curve (AUC) values of the T2 signal change at C4-C5, sex, cervical foramina width, curvature and posterior longitudinal ligament ossification were 0.706, 0.633, 0.617, 0.637, and 0.569, respectively.

conclusionsMale patients with C4-C5 intervertebral foramina stenosis, preoperative C4-C5 spinal cord T2 high signal, combined with OPLL, and higher preoperative cervical spine curvature are more likely to develop C5 nerve root paralysis after surgery. Among the above five risk factors, T2 hyperintensity change in C4-C5 exhibits the highest correlation with C5 paralysis and strong diagnostic power. It seems necessary to inform patients who have had cervical spine T2 hyperintensity before surgery of C5 nerve root paralysis after surgery, especially those with altered spinal cord T2 signals in the C4-C5 segment.

Indexed as

Cervical VertebraeParalysisDecompression, SurgicalFemaleHumansMaleRetrospective StudiesRisk FactorsSpinal Nerve RootsAUCC5 nerve root paralysisPCSSRisk factorsT2 hyperintensity

Identifiers

PMID34246250
PMCPMC8272892

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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.