Evidence map›Paper›PMID 33025189›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 Society2021

A cluster analysis describing spine and torso shape in Lenke type 1 adolescent idiopathic scoliosis.

Adrian Gardner, Fiona Berryman, Paul Pynsent

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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, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.

0numbers the graph read from it
0cells of the map it votes in
4citing papers in PubMed
–field-weighted citation impact
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

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3 · Its place in the literature

Who cites it

4 citing papers in PubMed.

  1. Improving the accuracy of current sagittal alignment evaluation system centered around pelvic incidence: a new machine-learning based classification.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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4 · The record

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5 · Who and what money

Authors and funding

3 authors.

Adrian GardnerInstitute of Clinical Sciences, University of Birmingham, Birmingham, UK. adrian.gardner@nhs.net.ORCID 0000-0001-6532-7950
Fiona BerrymanThe Royal Orthopaedic Hospital NHS Foundation Trust, Bristol Road South, Birmingham, UK.
Paul PynsentInstitute of Clinical Sciences, University of Birmingham, Birmingham, UK.

Funding

Birmingham Orthopaedic Charity AG
6 · The paper itself

Abstract

purposeThe purpose of this work is to identify the variability and subtypes of the combined shape of the spine and torso in Lenke type 1 adolescent idiopathic scoliosis (AIS).

methodsUsing ISIS2 surface topography, measures of coronal deformity, kyphosis and skin angulation (as a measure of torso asymmetry) in a series of children with Lenke 1 convex to the right AIS were analyzed using k-means clustering techniques to describe the combined variability of shape in the spine and torso. Following this, a k-nearest neighbor algorithm was used to measure the ability to automatically identify the correct cluster for any particular datum.

resultsThere were 1399 ISIS2 images from 691 individuals available for analysis. There were 5 clusters identified in the data representing the variability of the 3 measured parameters which included mild, moderate and marked coronal deformity, mild, moderate and marked asymmetry alongside normal and hypokyphosis. The k-nearest neighbor identification of the correct cluster had an accuracy of 93%.

conclusionThese clusters represent a new description of Lenke 1 AIS that comprises both coronal and sagittal measures of the spine combined with a measure of torso asymmetry. Automated identification of the clusters is accurate. The ability to identify subtypes of deformity, based on parameters that affect both the spine and the torso in AIS, leads to as better understanding of the totality of the deformity seen.

Indexed as

KyphosisScoliosisAdolescentChildCluster AnalysisHumansRetrospective StudiesSpineThoracic VertebraeTorsoAnalysisClusterISIS2Scoliosis

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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.