Evidence map›Paper›PMID 29411177›Full record

SynthesisNeurosurgical review2019

Pseudarthrosis in adult and pediatric spinal deformity surgery: a systematic review of the literature and meta-analysis of incidence, characteristics, and risk factors.

Nathan E How, John T Street, Marcel F Dvorak, Charles G Fisher, Brian K Kwon, Scott Paquette, Justin S Smith, Christopher I Shaffrey, Tamir Ailon

Abstract readMeta-AnalysisSystematic Review
PubMed Publisher
In one paragraph

Synthesis in Neurosurgical review, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 53 papers, 5 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
53citing papers in PubMed, 5 pooled it
9.7field-weighted citation impact, top 1% 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

53 citing papers in PubMed, 5 syntheses or guidelines pooled it, 108 citations in OpenAlex.

  1. Pooled it
  2. Combined anterior-posterior versus posterior only approach for surgical management of adult spinal deformity: a systematic review and meta-analysis of comparative studies.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 · 2025
    Pooled it
  3. Pooled it
  4. Pooled it
  5. Titanium (Ti) cages may be superior to polyetheretherketone (PEEK) cages in lumbar interbody fusion: a systematic review and meta-analysis of clinical and radiological outcomes of spinal interbody fusions using Ti versus PEEK cages.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
    Pooled it
  6. An Unexpected Journey: Migration of a Scoliosis Rod to the Groin.Acta orthopaedica et traumatologica turcica · 2026
    Article
  7. Article
  8. The impact of bone graft volume on risk of pseudarthrosis, screw loosening, and rod breakage in surgical correction of adult spinal deformity.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
    Article
  9. Article
  10. Article
  11. One-year CT evaluation of fusion in adult spinal deformity using supplemental anterior lumbar interbody fusion.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
    Article
  12. Review
  13. Article
  14. Article
  15. Article
  16. Review
  17. Review
  18. Article
  19. Article
  20. Review
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

9 authors at 3 institutions in 2 countries.

Nathan E HowSchool of Medicine, Queen's University, Kingston, ON, Canada.
John T StreetDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
Marcel F DvorakDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
Charles G FisherDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
Brian K KwonDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
Scott PaquetteDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada.
Justin S SmithDepartment of Neurosurgery, University of Virginia Health System, Charlottesville, VA, USA.
Christopher I ShaffreyDepartment of Neurosurgery, University of Virginia Health System, Charlottesville, VA, USA.
Tamir AilonDepartment of Orthopaedics, University of British Columbia, Vancouver, BC, Canada. tamir.ailon@vch.ca.
University of British Columbia · CAUniversity of Virginia Health System · USQueen's University · CA

Funding

Queen's University J.D. Hatcher Award
6 · The paper itself

Abstract

We conducted a systematic review with meta-analysis and qualitative synthesis. This study aims to characterize pseudarthrosis after long-segment fusion in spinal deformity by identifying incidence rates by etiology, risk factors for its development, and common features. Pseudarthrosis can be a painful and debilitating complication of spinal fusion that may require reoperation. It is poorly characterized in the setting of spinal deformity. The MEDLINE, EMBASE, and Cochrane databases were searched for clinical research including spinal deformity patients treated with long-segment fusions reporting pseudarthrosis as a complication. Meta-analysis was performed on etiologic subsets of the studies to calculate incidence rates for pseudarthrosis. Qualitative synthesis was performed to identify characteristics of and risk factors for pseudarthrosis. The review found 162 articles reporting outcomes for 16,938 patients which met inclusion criteria. In general, the included studies were of medium to low quality according to recommended reporting standards and study design. Meta-analysis calculated an incidence of 1.4% (95% CI 0.9-1.8%) for pseudarthrosis in adolescent idiopathic scoliosis, 2.2% (95% CI 1.3-3.2%) in neuromuscular scoliosis, and 6.3% (95% CI 4.3-8.2%) in adult spinal deformity. Risk factors for pseudarthrosis include age over 55, construct length greater than 12 segments, smoking, thoracolumbar kyphosis greater than 20°, and fusion to the sacrum. Choice of graft material, pre-operative coronal alignment, post-operative analgesics, and sex have no significant impact on fusion rates. Older patients with greater deformity requiring more extensive instrumentation are at higher risk for pseudarthrosis. Overall incidence of pseudarthrosis requiring reoperation is low in adult populations and very low in adolescent populations.

Indexed as

HumansIncidencePseudarthrosisReoperationRisk FactorsSpinal CurvaturesSpinal FusionPseudarthrosisScoliosisSpinal FusionSpine curvatureSurgical complication

Identifiers

PMID29411177
OpenAlexW2788463873

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.