Evidence map›Paper›PMID 33269455›Full record

Trial reportEuropean spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society2021

Long-term (> 10 years) clinical outcomes of instrumented posterolateral fusion for spondylolisthesis.

A M Lehr, D Delawi, J L C van Susante, N Verschoor, N Wolterbeek, F C Oner, M C Kruyt

Open access · hybridAbstract readMulticenter StudyRandomized Controlled Trial
PubMed Publisher
In one paragraph

Trial report 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 14 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
14citing papers in PubMed, 2 pooled it
1.6field-weighted citation impact, top 16% 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

14 citing papers in PubMed, 2 syntheses or guidelines pooled it, 25 citations in OpenAlex.

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  7. Intervertebral disc degeneration.Nature reviews. Disease primers · 2026
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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 5 institutions in 1 country.

A M LehrDepartment of Orthopaedic Surgery, University Medical Center Utrecht, 85500, 3508 GA, Utrecht, The Netherlands. a.m.lehr@umcutrecht.nl.ORCID http://orcid.org/0000-0001-8093-8768
D DelawiDepartment of Orthopaedic Surgery, St. Antonius Hospital, Utrecht, The Netherlands.
J L C van SusanteDepartment of Orthopaedic Surgery, Rijnstate Hospital, Arnhem, The Netherlands.
N VerschoorDepartment of Orthopaedic Surgery, Jeroen Bosch Hospital, Den Bosch, The Netherlands.
N WolterbeekDepartment of Orthopaedic Surgery, St. Antonius Hospital, Utrecht, The Netherlands.
F C OnerDepartment of Orthopaedic Surgery, University Medical Center Utrecht, 85500, 3508 GA, Utrecht, The Netherlands.
M C KruytDepartment of Orthopaedic Surgery, University Medical Center Utrecht, 85500, 3508 GA, Utrecht, The Netherlands.
St. Antonius Ziekenhuis · NLUniversity Medical Center Utrecht · NLJeroen Bosch Ziekenhuis · NLRijnstate Hospital · NLUtrecht University · NL

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeDespite the rapid increase in instrumented spinal fusions for a variety of indications, most studies focus on short-term fusion rates. Long-term clinical outcomes are still scarce and inconclusive. This study investigated clinical outcomes > 10 years after single-level instrumented posterolateral spinal fusion for lumbar degenerative or isthmic spondylolisthesis with neurological symptoms.

methodsCross-sectional long-term follow-up among the Dutch participants of an international multicenter randomized controlled trial comparing osteogenic protein-1 with autograft. Clinical outcomes were assessed using the Oswestry Disability Index (ODI), EQ-5D-3L and visual analogue scale (VAS) for leg and back pain, as well as questions on satisfaction with treatment and additional surgery.

resultsThe follow-up rate was 73% (41 patients). At mean 11.8 (range 10.1-13.7) years after surgery, a non-significant deterioration of clinical outcomes compared to 1-year follow-up was observed. The mean ODI was 20 ± 19, mean EQ-5D-3L index score 0.784 ± 0.251 and mean VAS for leg and back pain, respectively, 34 ± 33 and 31 ± 28. Multiple regression showed that diagnosis (degenerative vs. isthmic spondylolisthesis), graft type (OP-1 vs. autograft) and 1-year fusion status (fusion vs. no fusion) were not predictive for the ODI at long-term follow-up (p = 0.389). Satisfaction with treatment was excellent and over 70% of the patients reported lasting improvement in back and/or leg pain. No revision surgeries for non-union were reported.

conclusionThis study showed favourable clinical outcomes > 10 years after instrumented posterolateral spinal fusion and supports spondylolisthesis with neurological symptoms as indication for fusion surgery.

Indexed as

Spinal FusionSpondylolisthesisCross-Sectional StudiesHumansLumbar VertebraeTreatment OutcomeClinical outcomeLong-term follow-upOsteogenic protein-1Posterolateral spinal fusionSpondylolisthesis

Identifiers

PMID33269455
OpenAlexW3109001255

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.