ArticleBMC musculoskeletal disorders2020
Association between serum zinc and copper concentrations and copper/zinc ratio with the prevalence of knee chondrocalcinosis: a cross-sectional study.
Article in BMC musculoskeletal disorders, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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.
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, 10 citations in OpenAlex.
- Investigating synovial trace elements as diagnostic markers in acute septic arthritis: an exploratory study.Clinical rheumatology · 2026Article
- Circulating Essential Trace Element and Mineral Levels in Female Patients with Knee or Concomitant Knee and Hip Osteoarthritis.Biological trace element research · 2026Article
- Identification and verification of a novel signature that combines cuproptosis-related genes with ferroptosis-related genes in osteoarthritis using bioinformatics analysis and experimental validation.Arthritis research & therapy · 2024Article
- Serum copper-to-zinc ratio and risk of incident pneumonia in caucasian men: a prospective cohort study.Biometals : an international journal on the role of metal ions in biology, biochemistry, and medicine · 2022Article
- The application prospect of metal/metal oxide nanoparticles in the treatment of osteoarthritis.Naunyn-Schmiedeberg's archives of pharmacology · 2021Review
- Change in pulmonary function tests and their relation to the serum levels of ceruloplasmin, copper and superoxide dismutase in patients suffering from Type-1 and Type-2 diabetes.Pakistan journal of medical sciencesArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundPatients with chondrocalcinosis may suffer from a series of symptoms resembling acute gouty arthritis or septic arthritis, but the aetiology and pathogenesis of chondrocalcinosis have not been fully elucidated yet. This study was aimed to assess serum zinc and copper concentrations, as well as the ratio of serum copper to zinc concentrations (Cu/Zn ratio), in relation to the prevalence of knee chondrocalcinosis.
methodsData included in this analysis were retrieved from a large population-based cross-sectional study. A bilateral knee anteroposterior radiograph was obtained from each subject. Radiographic knee chondrocalcinosis was diagnosed if definite linear cartilage calcification was detected. Serum zinc and copper concentrations were measured using the spectrophotometric flow injection methods by Roche modular P800. The relations of serum zinc and copper concentrations and Cu/Zn ratio to the prevalence of knee chondrocalcinosis were examined using generalized estimating equations, respectively.
resultsThe prevalence of knee chondrocalcinosis was 1.2% in the sample of this study (n = 12,362). In comparison with the lowest tertile, the odds ratios (ORs) of knee chondrocalcinosis adjusted by age, sex and body mass index were 0.74 (95% CI 0.50-1.09) in the second and 0.56 (95% CI 0.36-0.86) in the third tertiles of serum zinc concentrations (P for trend = 0.009), were 1.26 (95% CI 0.77-2.05) in the second and 2.01 (95% CI 1.25-3.24) in the third tertile of serum copper concentrations (P for trend = 0.003), and were 1.02 (95% CI 0.61-1.69) in the second and 2.23 (95% CI 1.38-3.59) in the third tertile of Cu/Zn ratio (P for trend < 0.001) respectively. These findings were not materially altered by adjustment for potential confounders.
conclusionsThe present study observed that higher serum zinc concentrations, lower serum copper concentrations or lower Cu/Zn ratio are associated with a lower prevalence of knee chondrocalcinosis in a dose-response relationship manner.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.