Evidence map›Paper›PMID 30610019›Full record

ArticleBMJ open2019

Prevalence of rheumatoid arthritis in relation to serum cadmium concentrations: cross-sectional study using Korean National Health and Nutrition Examination Survey (KNHANES) data.

Sang Hyun Joo, Joongyub Lee, David Hutchinson, Yeong Wook Song

Open access · goldAbstract read
In one paragraph

Article in BMJ open, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed, 1 pooled it
2.8field-weighted citation impact, top 10% 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

16 citing papers in PubMed, 1 synthesis or guideline pooled it, 36 citations in OpenAlex.

  1. Pooled it
  2. Trace Elements-Role in Joint Function and Impact on Joint Diseases.International journal of molecular sciences · 2025
    Review
  3. Review
  4. Review
  5. Therapeutic potential ofVeterinary world · 2025
    Article
  6. Article
  7. Article
  8. Review
  9. Review
  10. Article
  11. Article
  12. Article
  13. Cadmium Body Burden and Inflammatory Arthritis: A Pilot Study in Patients from Lower Silesia, Poland.International journal of environmental research and public health · 2022
    Article
  14. Review
  15. Review
  16. Article
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

4 authors at 3 institutions in 2 countries.

Sang Hyun JooDivision of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
Joongyub LeeDivision of Clinical Epidemiology, Medical Research Collaborating Center, Biomedical Research Institute, Seoul National University Hospital, Seoul, Korea.
David HutchinsonRheumatology Department, Royal Cornwall Hospital, Truro, UK.
Yeong Wook SongDivision of Rheumatology, Department of Internal Medicine, Seoul National University Hospital, Seoul, Korea.
Seoul National University Hospital · KRRoyal Cornwall Hospital · GBSeoul National University · KR

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesIt has been suggested that exposure to heavy metal cadmium (Cd) may contribute to a high risk of developing rheumatoid arthritis (RA). This study was to investigate the association of RA prevalence and serum concentrations of Cd and other heavy metals through large survey data analysis.

designA retrospective cross-sectional survey study.

settingLarge population survey in Korea.

participants53 829 subjects participated in Korean National Health and Nutrition Examination Survey (KNHANES) from 2008 to 2013.

interventionsHeavy metals were measured in different time periods of the survey programme which resulted in three different data sets for analysis: Cd, mercury (Hg) and lead (Pb) from 2008 to 2012 survey; serum manganese (Mn) and urine arsenic (As) from 2008 to 2009 survey; and serum zinc (Zn) from 2010 survey. RA prevalence and its associations with serum heavy metals were analysed using a general linear/logistic regression model of complex sample design.

resultsSerum Cd was elevated in patients with RA (RA vs control: 1.30±0.07 µg/L vs 1.17±0.01 µg/L, p<0.01). There were no significant differences in urine levels of As or serum levels of Pb, Hg, Mn or Zn between patients with RA and controls. OR (95% CI) of RA prevalence according to 1 µg/L increase of serum Cd level was 1.28(95% CI 1.03 to 1.61). Prevalence of RA in women was increased with increasing quartiles of Cd levels, with a 19-fold difference in female RA prevalence between individuals in the lowest quartile of serum Cd level and those in the highest quartile (0.18% vs 3.42%). Cubic spline curve of prevalence OR showed increased risk of RA according to increased serum Cd level. Increased risk of RA in men was not observed with increased serum Cd levels.

conclusionThere was an increased prevalence of RA in females associated with increased serum levels of Cd in the Korean population.

Indexed as

Arthritis, RheumatoidCadmiumCase-Control StudiesCross-Sectional StudiesFemaleHumansLeadMaleMercuryMiddle AgedNutrition SurveysPrevalenceRepublic of KoreaRetrospective StudiesSmokingCadmiumLeadMercurycadmiumhealthcare surveysheavy metal toxicityrheumatoid arthritis

Identifiers

PMID30610019
PMCPMC6326419
OpenAlexW2907007142

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC
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.