Evidence map›Paper›PMID 26485730›Full record

ArticleEnvironmental health perspectives2016

Thyroid Hormones and Moderate Exposure to Perchlorate during Pregnancy in Women in Southern California.

Craig Steinmaus, Michelle Pearl, Martin Kharrazi, Benjamin C Blount, Mark D Miller, Elizabeth N Pearce, Liza Valentin-Blasini, Gerald DeLorenze, Andrew N Hoofnagle, Jane Liaw

Open access · diamondAbstract read
In one paragraph

Article in Environmental health perspectives, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed, 2 pooled it
4.1field-weighted citation impact, top 6% 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

27 citing papers in PubMed, 2 syntheses or guidelines pooled it, 69 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Article
  4. Article
  5. Article
  6. Gestational Exposure to Perchlorate in the Rat: Thyroid Hormones in Fetal Thyroid Gland, Serum, and Brain.Toxicological sciences : an official journal of the Society of Toxicology · 2022
    Article
  7. Article
  8. An endocrinologist's journey in iodine nutrition.European journal of clinical nutrition · 2022
    Review
  9. Review
  10. Review
  11. Review
  12. Endocrine Disruptors-'Food' for Thought.Proceedings of the Zoological Society · 2021
    Review
  13. Review
  14. Article
  15. Differences in Prenatal Tobacco Exposure Patterns among 13 Race/Ethnic Groups in California.International journal of environmental research and public health · 2019
    Article
  16. Article
  17. Article
  18. Article
  19. Review
  20. 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

10 authors at 8 institutions in 1 country.

Craig SteinmausOffice of Environmental Health Hazard Assessment, California Environmental Protection Agency, Oakland, California, USA.
Michelle Pearl
Martin Kharrazi
Benjamin C Blount
Mark D Miller
Elizabeth N Pearce
Liza Valentin-Blasini
Gerald DeLorenze
Andrew N Hoofnagle
Jane Liaw
Berkeley Public Health Division · USCenters for Disease Control and Prevention · USBoston University · USCalifornia Department of Public Health · USKaiser Permanente · USSequoia Foundation · USUniversity of California, San Francisco · USUniversity of Washington · US

Funding

PERCHLORATE AND THYROID HORMONES IN PREGNANCY AND INFANTS IN SOUTHERN CALIFORNIAR01ES020365 · NIEHS · UNIVERSITY OF CALIFORNIA BERKELEY · PI STEINMAUS, CRAIG M · 2011 to 2014
$2.1M
NIEHS NIH HHS R01 ES020365
6 · The paper itself

Abstract

backgroundFindings from national surveys suggest that everyone in the United States is exposed to perchlorate. At high doses, perchlorate, thiocyanate, and nitrate inhibit iodide uptake into the thyroid and decrease thyroid hormone production. Small changes in thyroid hormones during pregnancy, including changes within normal reference ranges, have been linked to cognitive function declines in the offspring.

objectivesWe evaluated the potential effects of low environmental exposures to perchlorate on thyroid function.

methodsSerum thyroid hormones and anti-thyroid antibodies and urinary perchlorate, thiocyanate, nitrate, and iodide concentrations were measured in 1,880 pregnant women from San Diego County, California, during 2000-2003, a period when much of the area's water supply was contaminated from an industrial plant with perchlorate at levels near the 2007 California regulatory standard of 6 μg/L. Linear regression was used to evaluate associations between urinary perchlorate and serum thyroid hormone concentrations in models adjusted for urinary creatinine and thiocyanate, maternal age and education, ethnicity, and gestational age at serum collection.

resultsThe median urinary perchlorate concentration was 6.5 μg/L, about two times higher than in the general U.S. POPULATION: Adjusted associations were identified between increasing log10 perchlorate and decreasing total thyroxine (T4) [regression coefficient (β) = -0.70; 95% CI: -1.06, -0.34], decreasing free thyroxine (fT4) (β = -0.053; 95% CI: -0.092, -0.013), and increasing log10 thyroid-stimulating hormone (β = 0.071; 95% CI: 0.008, 0.133).

conclusionsThese results suggest that environmental perchlorate exposures may affect thyroid hormone production during pregnancy. This could have implications for public health given widespread perchlorate exposure and the importance of thyroid hormone in fetal neurodevelopment. CITATION: Steinmaus C, Pearl M, Kharrazi M, Blount BC, Miller MD, Pearce EN, Valentin-Blasini L, DeLorenze G, Hoofnagle AN, Liaw J. 2016. Thyroid hormones and moderate exposure to perchlorate during pregnancy in women in Southern California. Environ Health Perspect 124:861-867; http://dx.doi.org/10.1289/ehp.1409614.

Indexed as

AdultCaliforniaEnvironmental PollutantsFemaleHumansMaternal ExposurePerchloratesPregnancyThyroid HormonesEnvironmental PollutantsPerchloratesThyroid Hormones

Identifiers

PMID26485730
PMCPMC4892913
OpenAlexW2429860741

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.