Evidence map›Paper›PMID 17449564›Full record

ArticleOccupational and environmental medicine2007

Association of blood lead and homocysteine levels among lead exposed subjects in Vietnam and Singapore.

Sin Eng Chia, Safiyya Mohamed Ali, Bee Lan Lee, Gek Hsiang Lim, Su Jin, Nguyen-Viet Dong, Nguyen Thi Hong Tu, Choon Nam Ong, Kee Seng Chia

Abstract readComparative Study
In one paragraph

Article in Occupational and environmental medicine, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
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

15 citing papers in PubMed.

  1. Review
  2. Article
  3. Lead (Pb) exposure and heart failure risk.Environmental science and pollution research international · 2021
    Review
  4. Article
  5. Article
  6. Article
  7. Review
  8. Article
  9. Article
  10. Article
  11. Article
  12. Association of homocysteine levels with blood lead levels and micronutrients in the US general population.Journal of preventive medicine and public health = Yebang Uihakhoe chi · 2012
    Article
  13. The protean toxicities of lead: new chapters in a familiar story.International journal of environmental research and public health · 2011
    Review
  14. Article
  15. 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

9 authors.

Sin Eng ChiaDepartment of Community, Occupational and Family Medicine, Faculty of Medicine, National University of Singapore, Republic of Singapore. cofcse@nus.edu.sg
Safiyya Mohamed Ali
Bee Lan Lee
Gek Hsiang Lim
Su Jin
Nguyen-Viet Dong
Nguyen Thi Hong Tu
Choon Nam Ong
Kee Seng Chia

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectivesLead and homocysteine are both linked to cardiovascular disease. With this in mind, the authors evaluated the relation between blood lead and homocysteine in people aged 19-66 years in two Asian populations.

methodsThis cross-sectional study comprised 183 workers from a lead stabiliser factory in Singapore and 323 workers from a battery factory in Vietnam. Workers were occupationally exposed to lead. Blood lead was analysed using atomic absorption spectrophotometry while plasma homocysteine was measured using high performance liquid chromatography.

resultsChinese subjects had the lowest blood lead levels while the Indians had the highest. Controlling for age, sex and race, an increase of 1 microg/dl in blood lead was associated with an increase of 0.04 micromol/l of homocysteine on the log scale. Gender and ethnicity seemed to be strongly associated with the relation between lead and homocysteine. The positive relation between lead and homocysteine among the Vietnamese subjects was significant (Pearson's r = 0.254, p<0.01). When blood lead levels were divided by quartiles, the correlation coefficient between blood lead levels in the 4th quartile and homocysteine among the Vietnamese was higher (r = 0.405, p<0.01). Overall, an increase of 1 microg/dl in blood lead in all the Vietnamese subjects was associated with an increase of 0.05 micromol/l increase in homocysteine on the log scale. However, in the 4th quartile, the same increase was associated with an increase of 0.41 micromol/l of homocysteine on the log scale.

conclusionsBlood lead was found to be associated with homocysteine levels in this Asian sample. Although we cannot determine causality from cross-sectional data, it is sensible to consider the probability that this relation could explain one of the mechanisms of the impact of lead on the cardiovascular system. More studies would be needed to confirm this inference.

Indexed as

AdultAgedAge DistributionCross-Sectional StudiesFemaleHomocysteineHumansLeadLead PoisoningLinear ModelsMaleMiddle AgedOccupational DiseasesRacial GroupsSex DistributionSingaporeHomocysteineLead

Identifiers

PMID17449564
PMCPMC2078393

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.