Evidence map›Paper›PMID 33856551›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

Artificial intelligence clustering of adult spinal deformity sagittal plane morphology predicts surgical characteristics, alignment, and outcomes.

Wesley M Durand, Renaud Lafage, D Kojo Hamilton, Peter G Passias, Han Jo Kim, Themistocles Protopsaltis, Virginie Lafage, Justin S Smith, Christopher Shaffrey, Munish Gupta and 15 more

Abstract readMulticenter Study
PubMed Publisher
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, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
6.1field-weighted citation impact, top 3% 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, 37 citations in OpenAlex.

  1. Article
  2. Article
  3. Article
  4. Radiographic phenotype-driven clustering in lumbar decompression: comparative study of outcome and reoperation risk.The spine journal : official journal of the North American Spine Society · 2026
    Article
  5. Review
  6. Article
  7. Review
  8. Article
  9. Article
  10. Review
  11. Emerging Technologies within Spine Surgery.Life (Basel, Switzerland) · 2023
    Review
  12. Radiomics in Spine Surgery.International journal of spine surgery · 2023
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. Review
  18. Review
  19. Article
  20. 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

25 authors at 16 institutions in 2 countries.

Wesley M DurandDepartment of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Alpert Medical School, Providence, Rhode Island, 1 Kettle Point Avenue, East Providence, RI, 02914, USA.
Renaud LafageHospital for Special Surgery, Newyork city, NY, USA.
D Kojo HamiltonUniversity of Pittsburgh Medical Center, Pittsburgh, PA, USA.
Peter G PassiasLangone Medical Center, New York University, New York City, NY, USA.
Han Jo KimHospital for Special Surgery, Newyork city, NY, USA.
Themistocles ProtopsaltisLangone Medical Center, New York University, New York City, NY, USA.
Virginie LafageHospital for Special Surgery, Newyork city, NY, USA.
Justin S SmithUniversity of Virginia Health System, Charlottesville, VA, USA.
Christopher ShaffreyDepartment of Neurosurgery, Duke University Medical Center, Durham, NC, USA.
Munish GuptaWashington University, St. Louis, MO, USA.
Michael P KellyWashington University, St. Louis, MO, USA.
Eric O KlinebergUniversity of California, UC Davis Medical Center, Sacramento, CA, USA.
Frank SchwabHospital for Special Surgery, Newyork city, NY, USA.
Jeffrey L GumLeatherman Spine Center, Louisville, KY, USA.
Gregory MundisSan Diego Spine, La Jolla, San Diego, CA, USA.
Robert EastlackSan Diego Spine, La Jolla, San Diego, CA, USA.
Khaled KebaishJohns Hopkins University School of Medicine, Baltimore, MD, USA.
Alex SoroceanuUniversity of Calgary, Calgary, AB, Canada.
Richard A HostinSouthwest Scoliosis Institute, Plano, TX, USA.
Doug BurtonMedical Center, University of Kansas, Kansas City, KS, USA.
Shay BessDenver International Spine Center, Denver, CO, USA.
Christopher AmesUniversity of California, San Francisco, San Diego, CA, USA.
Robert A HartSwedish Neuroscience Institute, Swedish Medical Center, Seattle, WA, USA.
Alan H DanielsDepartment of Orthopaedic Surgery, Warren Alpert Medical School of Brown University, Alpert Medical School, Providence, Rhode Island, 1 Kettle Point Avenue, East Providence, RI, 02914, USA. alandanielsmd@gmail.com.ORCID 0000-0001-9597-4139
International Spine Study Group (ISSG)
Hospital for Special Surgery · USBrown University · USNYU Langone Health · USSan Diego Spine Institute · USWashington University in St. Louis · USDuke Medical Center · USJohns Hopkins University · USSouthwest Scoliosis Institute · USSwedish Medical Center · USTwin Cities Spine Center · USUniversity of Calgary · CAUniversity of California Davis Medical Center · USUniversity of California, San Francisco · USUniversity of Kansas Medical Center · USUniversity of Pittsburgh Medical Center · USUniversity of Virginia Health System · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeAI algorithms have shown promise in medical image analysis. Previous studies of ASD clusters have analyzed alignment metrics-this study sought to complement these efforts by analyzing images of sagittal anatomical spinopelvic landmarks. We hypothesized that an AI algorithm would cluster preoperative lateral radiographs into groups with distinct morphology.

methodsThis was a retrospective review of a multicenter, prospectively collected database of adult spinal deformity. A total of 915 patients with adult spinal deformity and preoperative lateral radiographs were included. A 2 × 3, self-organizing map-a form of artificial neural network frequently employed in unsupervised classification tasks-was developed. The mean spine shape was plotted for each of the six clusters. Alignment, surgical characteristics, and outcomes were compared.

resultsQualitatively, clusters C and D exhibited only mild sagittal plane deformity. Clusters B, E, and F, however, exhibited marked positive sagittal balance and loss of lumbar lordosis. Cluster A had mixed characteristics, likely representing compensated deformity. Patients in clusters B, E, and F disproportionately underwent 3-CO. PJK and PJF were particularly prevalent among clusters A and E. Among clusters B and F, patients who experienced PJK had significantly greater positive sagittal balance than those who did not.

conclusionsThis study clustered preoperative lateral radiographs of ASD patients into groups with highly distinct overall spinal morphology and association with sagittal alignment parameters, baseline HRQOL, and surgical characteristics. The relationship between SVA and PJK differed by cluster. This study represents significant progress toward incorporation of computer vision into clinically relevant classification systems in adult spinal deformity. LEVEL OF EVIDENCE IV: Diagnostic: individual cross-sectional studies with the consistently applied reference standard and blinding.

Indexed as

Artificial IntelligenceLordosisAdultCluster AnalysisCross-Sectional StudiesHumansRetrospective StudiesAdult spinal deformityComputer visionMedical image analysis

Identifiers

PMID33856551
OpenAlexW3156566030

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.