SynthesisJournal of orthopaedic surgery and research2018
Collagen IX gene polymorphisms and lumbar disc degeneration: a systematic review and meta-analysis.
Synthesis in Journal of orthopaedic surgery and research, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers, 1 of them a synthesis that pooled it.
What it found
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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.
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.
Who cites it
6 citing papers in PubMed, 1 synthesis or guideline pooled it, 16 citations in OpenAlex.
- Association between polymorphisms of collagen genes and susceptibility to intervertebral disc degeneration: a meta-analysis.Journal of orthopaedic surgery and research · 2021Pooled it
- The Role of Collagen Genetic Variability in Degenerative Disc Disease and Related Conditions.Current genomics · 2025Review
- A novel missense COL9A3 variant in a pedigree with multiple lumbar disc herniation.Journal of orthopaedic surgery and research · 2024Article
- The Role of Polymorphisms in Collagen-Encoding Genes in Intervertebral Disc Degeneration.Biomolecules · 2021Review
- Genetic Predictors of Early-Onset Spinal Intervertebral Disc Degeneration: Part One of Two.Cureus · 2021Review
- Multiple variants in collagen genes are associated with the susceptibility to lumbar disc herniation in the Chinese population.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 · 2020Article
Corrections and comments
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Authors and funding
7 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundAn increasing number of studies have investigated associations between collagen IX alpha 2 chain (COL9A2) and collagen IX alpha 3 chain (COL9A3) gene polymorphisms and the risk of lumbar disc degeneration (LDD). However, these studies have yielded contradictory results. The purpose of this meta-analysis is to investigate the association between the collagen IX gene polymorphisms (rs12077871, rs12722877, rs7533552 in COL9A2; rs61734651 in COL9A3) and LDD.
methodsAll relevant articles were collected from PubMed, Web of Science, and China National Knowledge Infrastructure (CNKI). The last electronic search was performed on September 1, 2017. The allele/genotype frequencies were extracted from each study. The odds ratio (OR) and 95% confidence interval (CI) were used to assess the strength of associations under the five comparison genetic models. Statistical analysis was performed by Review Manager (RevMan) 5.31 software.
resultsThe meta-analysis of 10 case-control studies, including 2102 LDD cases and 2507 controls, indicated that COL9A2 gene (rs12077871, rs12722877, rs7533552) and COL9A3 gene (rs61734651) polymorphisms were not associated with LDD (rs12077871: T vs. C, OR = 1.85, 95% CI = 0.87-3.91, P = 0.11; rs12722877: G vs. C, OR = 0.83, 95% CI = 0.69-1.01, P = 0.06; rs7533552: G vs. A, OR = 1.11, 95% CI = 0.98-1.25, P = 0.09; rs61734651: T vs. C, OR = 1.57, 95% CI = 0.51-4.84, P = 0.43). The Egger text and the Begg funnel plot did not show any evidence of publication bias.
conclusionrs12077871, rs12722877, and rs7533552 variants in COL9A2 and rs61734651 variant in COL9A3 were not significantly associated with a predisposition to LDD. Large-scale and well-designed studies are needed to confirm this conclusion.
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