Evidence map›Paper›PMID 22739056›Full record

ArticleEnvironmental health perspectives2012

Adverse health effects of child labor: high exposure to chromium and oxidative DNA damage in children manufacturing surgical instruments.

Muhammad Sughis, Tim S Nawrot, Vincent Haufroid, Benoit Nemery

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2012. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 19 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
19citing papers in PubMed, 1 pooled it
2.4field-weighted citation impact, top 14% 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

19 citing papers in PubMed, 1 synthesis or guideline pooled it, 63 citations in OpenAlex.

  1. Child labour and health: a systematic review.International journal of public health · 2018
    Pooled it
  2. Article
  3. Review
  4. Article
  5. Article
  6. Article
  7. Article
  8. The Health Impacts of Hazardous Chemical Exposures among Child Labourers in Low- and Middle-Income Countries.International journal of environmental research and public health · 2021
    Review
  9. Emission-related Heavy Metal Associated with Oxidative Stress in Children: Effect of Antioxidant Intake.International journal of environmental research and public health · 2020
    Article
  10. Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Article
  16. Environmental exposure and effects on health of children from a tobacco-producing region.Environmental science and pollution research international · 2017
    Article
  17. Review
  18. Article
  19. Article
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

4 authors at 3 institutions in 1 country.

Muhammad SughisLung Toxicology Research Unit, Department of Public Health, KU Leuven, Leuven, Belgium.
Tim S Nawrot
Vincent Haufroid
Benoit Nemery
KU Leuven · BEHasselt University · BEUCLouvain · BE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundA considerable part of the worldwide production of surgical instruments takes place in Sialkot, Pakistan. Many children work in hazardous conditions in this industry.

objectiveWe investigated exposure to metals and possible health effects among children working in surgical instruments manufacturing units compared with schoolchildren from the same city.

methodsIn a cross-sectional study we studied a convenience sample of 104 male children (10-14 years of age) working in surgical instruments manufacturing units and 75 male children of similar age from a school in Sialkot, Pakistan. A respiratory questionnaire was administered, spirometry was performed, and blood pressure was measured. In a spot urine sample, concentrations of metals were measured by inductively coupled plasma mass spectrometry and 8-hydroxydeoxyguanosine (8OHdG, reflecting oxidative DNA damage) by ELISA.

resultsThe working children reported more asthma (10% vs. 0%; p = 0.005) and dry cough at night (36% vs. 20%; p = 0.02) than did the schoolchildren, but there were no significant differences in pulmonary function or blood pressure. The urinary concentration of chromium was 35 times higher in working children [geometric mean, 23.0 µg/L; 25th-75th percentile, 8.38-58.6] than in schoolchildren [0.66 µg/L; 0.38-1.09)], and largely in excess of the occupational Biological Exposure Index for adult workers (25 µg/L). Urinary 8-OHdG concentrations were not significantly higher in working children than in schoolchildren (19.3 vs. 17.6 µg/g creatinine, p = 0.4), but were significantly correlated with urinary nickel (r = 0.41; p < 0.0001) and with a composite index of metal exposure (r = 0.46; p < 0.0001).

conclusionsChildren working in the surgical instruments manufacturing industry had substantial exposure to several metals, especially chromium and nickel, which are established carcinogens. Exposure to nickel was associated with evidence of increased oxidative DNA damage.

Indexed as

IndustryOccupational Exposure8-Hydroxy-2'-DeoxyguanosineAdolescentAir Pollutants, OccupationalBiomarkersBlood PressureCarcinogensChildChromiumCross-Sectional StudiesDeoxyguanosineDNA DamageEnvironmental MonitoringEnzyme-Linked Immunosorbent AssayHumans8-Hydroxy-2'-DeoxyguanosineAir Pollutants, OccupationalBiomarkersCarcinogensChromiumDeoxyguanosineNickel

Identifiers

PMID22739056
PMCPMC3491927
OpenAlexW1965990201

What OpenQuestion holds

Textmetadata
LicenceCC0
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.