Evidence map›Paper›PMID 29808425›Full record

SynthesisEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2018

Relationship between sagittal balance and adjacent segment disease in surgical treatment of degenerative lumbar spine disease: meta-analysis and implications for choice of fusion technique.

Kevin Phan, Alexander Nazareth, Awais K Hussain, Adam A Dmytriw, Mithun Nambiar, Damian Nguyen, Jack Kerferd, Steven Phan, Chet Sutterlin, Samuel K Cho and 1 more

Erratum issuedAbstract readMeta-Analysis
PubMed Publisher
In one paragraph

Synthesis 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, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. An erratum has been issued. Cited by 44 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
44citing papers in PubMed, 1 pooled it
7.3field-weighted citation impact, top 2% 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

44 citing papers in PubMed, 1 synthesis or guideline pooled it, 102 citations in OpenAlex.

  1. Clinical outcomes and complication profile of total hip arthroplasty after lumbar spine fusion: a meta-analysis and systematic review.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 · 2020
    Pooled it
  2. Association of diffuse idiopathic skeletal hyperostosis with postoperative outcomes following surgery for degenerative lumbar spine disease.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
  3. "Risk factors for early-onset adjacent segment disease at L5-S1 segment after isolated L4-5 lumbar fusion surgery".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
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  14. Validation of Roussouly classification in predicting the occurrence of adjacent segment disease after short-level lumbar fusion surgery.Journal of orthopaedics and traumatology : official journal of the Italian Society of Orthopaedics and Traumatology · 2024
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  18. Minimally invasive LLIF surgery to decrease the occurrence of adjacent-segment disease compared to conventional open TLIF.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 · 2023
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

11 authors at 6 institutions in 3 countries.

Kevin PhanNeuroSpine Surgery Research Group (NSURG), Prince of Wales Private Hospital, Sydney, Australia. kphan.vc@gmail.com.
Alexander NazarethKeck School of Medicine, University of Southern California, Los Angeles, USA.
Awais K HussainDepartment of Orthopaedics Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
Adam A DmytriwDepartment of Medical Imaging, University of Toronto, Toronto, Canada.
Mithun NambiarDepartment of Surgery, University of Melbourne, Melbourne, Australia.
Damian NguyenUniversity of Adelaide, Adelaide, Australia.
Jack KerferdNeuroSpine Surgery Research Group (NSURG), Prince of Wales Private Hospital, Sydney, Australia.
Steven PhanNeuroSpine Surgery Research Group (NSURG), Prince of Wales Private Hospital, Sydney, Australia.
Chet SutterlinSpinal Health International, Inc., Longboat Key, FL, USA.
Samuel K ChoDepartment of Orthopaedics Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, USA.
Ralph J MobbsNeuroSpine Surgery Research Group (NSURG), Prince of Wales Private Hospital, Sydney, Australia.
Prince of Wales Hospital · AUIcahn School of Medicine at Mount Sinai · USUniversity of Adelaide · AUUniversity of Melbourne · AUUniversity of Southern California · USUniversity of Toronto · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

STUDY

designMeta-analysis.

objectiveTo conduct a meta-analysis investigating the relationship between spinopelvic alignment parameters and development of adjacent level disease (ALD) following lumbar fusion for degenerative disease. ALD is a degenerative pathology that develops at mobile segments above or below fused spinal segments. Patient outcomes are worse, and the likelihood of requiring revision surgery is higher in ALD compared to patients without ALD. Spinopelvic sagittal alignment has been found to have a significant effect on outcomes post-fusion; however, studies investigating the relationship between spinopelvic sagittal alignment parameters and ALD in degenerative lumbar disease are limited.

methodsSix e-databases were searched. Predefined endpoints were extracted and meta-analyzed from the identified studies.

resultsThere was a significantly larger pre-operative PT in the ALD cohort versus control (WMD 3.99, CI 1.97-6.00, p = 0.0001), a smaller pre-operative SS (WMD - 2.74; CI - 5.14 to 0.34, p = 0.03), and a smaller pre-operative LL (WMD - 4.76; CI - 7.66 to 1.86, p = 0.001). There was a significantly larger pre-operative PI-LL in the ALD cohort (WMD 8.74; CI 3.12-14.37, p = 0.002). There was a significantly larger postoperative PI in the ALD cohort (WMD 2.08; CI 0.26-3.90, p = 0.03) and a larger postoperative PT (WMD 5.23; CI 3.18-7.27, p < 0.00001).

conclusionThe sagittal parameters: PT, SS, PI-LL, and LL may predict development of ALD in patients' post-lumbar fusion for degenerative disease. Decision-making aimed at correcting these parameters may decrease risk of developing ALD in this cohort. These slides can be retrieved under Electronic Supplementary Material.

Indexed as

AgedFemaleHumansIntervertebral Disc DegenerationLumbar VertebraeMaleMiddle AgedPelvic BonesPostoperative ComplicationsReoperationRetrospective StudiesRisk FactorsSpinal FusionAdjacent segment diseaseDeformityLumbar degenerationLumbar lordosisPelvic incidenceSagittal alignmentSagittal compensateSpinopelvic parameters

Identifiers

PMID29808425
OpenAlexW2806103017

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.