Evidence map›Paper›PMID 37880410›Full record

ArticleEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2024

A novel classification that defines the normal cervical spine: an analysis based on 632 asymptomatic Chinese volunteers.

Zixiao Zhang, Jinyu Wang, Rile Ge, Chen Guo, Yan Liang, Haiying Liu, Shuai Xu

Open access · hybridAbstract read
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In one paragraph

Article in 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, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.

0numbers the graph read from it
0cells of the map it votes in
5citing papers in PubMed
2.9field-weighted citation impact, top 9% 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, 9 citations in OpenAlex.

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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 3 institutions in 1 country.

Zixiao ZhangPeking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China.
Jinyu Wang *Qingdao Chengyang People's Hospital, No. 600 Changcheng Road, Chengyang District, Qingdao, Shandong, People's Republic of China.
Rile Ge *Peking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China.
Chen GuoPeking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China.
Yan LiangPeking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China.
Haiying LiuPeking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China.
Shuai XuPeking University People's Hospital, Peking University, No. 11 Xizhimen South Street, Xicheng District, Beijing, 100044, People's Republic of China. xushuairmyy@pku.edu.cn.
Peking University · CNPeking University People's Hospital · CNQingdao Municipal Hospital · CN

Funding

Beijing Natural Science Foundation 7232182Research and Development Fund of Peking University People's Hospital RDL2022-52Research and Development Fund of Peking University People's Hospital RDY2021-12
6 · The paper itself

Abstract

purposeThe "normal" cervical spine may be non-lordotic shapes and the cervical spine alignment targets are less well established. So, the study was to propose novel classification for cervical spine morphologies with Chinese asymptomatic subjects, and to address cervical balance status based on the classification.

methodAn overall 632 asymptomatic individuals on cervical spine were selected from January 2020 to December 2022, with six age groups from 20-30 year to 70 plus group. Cervical alignment contained C2-7 cervical lordosis (C2-7 CL) and T1 slope (T1S), together with C1-2 CL, C2-4 CL, C5-7 CL, C2S, cervical sagittal vertical axis (CSVA), thoracic inlet angle (TIA) and neck tilt (NT). C2-7 cervical lordosis was regarded as primary outcomes. To identify groups with similar cervical alignment parameters, a 2-step cluster analysis was performed.

resultsC2-7 CL, T1S, CSVA, TIA and NT increased by age and mean value of them were larger in male than female group. Four unique clusters of female lordotic cluster, female kyphotic cluster, male lordotic cluster and male kyphotic cluster were classified mainly based on gender and C2-C7 CL. T1S was the independent influencing factor for C2-7 CL in all individuals and C2-7 CL = -28.65 + 0.57 × TIA, which varied from clusters. Although interactions among cervical parameters, it showed the alignment was more coordinated in lordotic groups.

conclusionsThe cervical sagittal profile varied with age and gender. Four clusters were naturally classified based on C2-7 CL and gender. The cervical balance status was addressed by C2-7 CL =  - 28.65 + 0.57 × TIA.

Indexed as

KyphosisLordosisCervical VertebraeChinaFemaleHumansMaleNeckRetrospective StudiesC2-7 cervical lordosisCervical balanceCervical spine morphotypesGenderT1 slope

Identifiers

PMID37880410
OpenAlexW4387934383

What OpenQuestion holds

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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.