Evidence map›Paper›PMID 19422710›Full record

ArticleBMC musculoskeletal disorders2009

Cumulative occupational lumbar load and lumbar disc disease--results of a German multi-center case-control study (EPILIFT).

Andreas Seidler, Annekatrin Bergmann, Matthias Jäger, Rolf Ellegast, Dirk Ditchen, Gine Elsner, Joachim Grifka, Johannes Haerting, Friedrich Hofmann, Oliver Linhardt and 5 more

Open access · goldAbstract readMulticenter Study
In one paragraph

Article in BMC musculoskeletal disorders, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
47citing papers in PubMed, 8 pooled it
3.8field-weighted citation impact, top 8% 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

47 citing papers in PubMed, 8 syntheses or guidelines pooled it, 124 citations in OpenAlex.

  1. Pooled it
  2. Incidence of and risk factors for lumbar disc herniation with radiculopathy in adults: a 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 · 2025
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  12. Development and validation of a prognostic prediction model for lumbar-disc herniation based on machine learning and fusion of clinical text data and radiomic features.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

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

15 authors at 7 institutions in 1 country.

Andreas SeidlerFederal Institute for Occupational Safety and Health, Nöldnerstrasse 40-42, 10317 Berlin, Germany. seidler.andreas@baua.bund.de
Annekatrin Bergmann
Matthias Jäger
Rolf Ellegast
Dirk Ditchen
Gine Elsner
Joachim Grifka
Johannes Haerting
Friedrich Hofmann
Oliver Linhardt
Alwin Luttmann
Martina Michaelis
Gabriela Petereit-Haack
Barbara Schumann
Ulrich Bolm-Audorff
Martin Luther University Halle-Wittenberg · DEInstitut für Arbeitsschutz der Deutschen Gesetzlichen Unfallversicherung · DEResearch Centre for Applied System Safety and Industrial Medicine · DETU Dortmund University · DEUniversity of Regensburg · DEFederal Institute for Occupational Safety and Health · DEGoethe University Frankfurt · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundThe to date evidence for a dose-response relationship between physical workload and the development of lumbar disc diseases is limited. We therefore investigated the possible etiologic relevance of cumulative occupational lumbar load to lumbar disc diseases in a multi-center case-control study.

methodsIn four study regions in Germany (Frankfurt/Main, Freiburg, Halle/Saale, Regensburg), patients seeking medical care for pain associated with clinically and radiologically verified lumbar disc herniation (286 males, 278 females) or symptomatic lumbar disc narrowing (145 males, 206 females) were prospectively recruited. Population control subjects (453 males and 448 females) were drawn from the regional population registers. Cases and control subjects were between 25 and 70 years of age. In a structured personal interview, a complete occupational history was elicited to identify subjects with certain minimum workloads. On the basis of job task-specific supplementary surveys performed by technical experts, the situational lumbar load represented by the compressive force at the lumbosacral disc was determined via biomechanical model calculations for any working situation with object handling and load-intensive postures during the total working life. For this analysis, all manual handling of objects of about 5 kilograms or more and postures with trunk inclination of 20 degrees or more are included in the calculation of cumulative lumbar load. Confounder selection was based on biologic plausibility and on the change-in-estimate criterion. Odds ratios (OR) and 95% confidence intervals (CI) were calculated separately for men and women using unconditional logistic regression analysis, adjusted for age, region, and unemployment as major life event (in males) or psychosocial strain at work (in females), respectively. To further elucidate the contribution of past physical workload to the development of lumbar disc diseases, we performed lag-time analyses.

resultsWe found a positive dose-response relationship between cumulative occupational lumbar load and lumbar disc herniation as well as lumbar disc narrowing among men and women. Even past lumbar load seems to contribute to the risk of lumbar disc disease.

conclusionAccording to our study, cumulative physical workload is related to lumbar disc diseases among men and women.

Indexed as

Task Performance and AnalysisAdultAgedBiomechanical PhenomenaCase-Control StudiesCausalityComorbidityCompressive StrengthFemaleGermanyHumansIntervertebral DiscIntervertebral Disc DisplacementLumbar VertebraeMaleMiddle Aged

Identifiers

PMID19422710
PMCPMC2689164
OpenAlexW2039451700

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.