Evidence map›Paper›PMID 12003755›Full record

ArticleEnvironmental health perspectives2002

Reproducibility of urinary phthalate metabolites in first morning urine samples.

Jane A Hoppin, John W Brock, Barbara J Davis, Donna D Baird

Registry-linked trialAbstract readEvaluation Study
In one paragraph

Article in Environmental health perspectives, 2002. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT07560579 (Weight Loss and Endocrine Disrupting Chemicals), which is not on this map. Cited by 151 papers, 8 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
151citing papers in PubMed, 8 pooled it
–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.

NCT07560579 naactive not recruitingnot on this mapstarted 2025, after this paper: background citation

Weight Loss and Endocrine Disrupting Chemicals (EDCs): Lifestyle Interventions to Lose Weight and Reduce EDC Exposure in Individuals With Overweight/Obesity

TypeinterventionalSponsorMillion Marker Wellness, Inc.Ran2025 to 2026Enrolled226ConditionsObesity &Amp, Amp, Amp, OverweightArmsEducational curriculum, Weight loss Application, Urinary EDC metabolite testing, Siphox clinic biomarker test, Weight loss reporting
3 · Its place in the literature

Who cites it

151 citing papers in PubMed, 8 syntheses or guidelines pooled it.

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91 more citing papers are in PubMed but not listed here.

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.

Jane A HoppinEpidemiology Branch, National Institute of Environmental Health Sciences, Research Triangle Park, North Carolina 27709-2233, USA. hoppin1@niehs.nih.gov
John W Brock
Barbara J Davis
Donna D Baird

Funding

Uterine LeiomyomasZIAES049013 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI JUKIC, ANNE MARIE · 2009 to 2025
$14.7M
Environmental Effects On FertilityZIAES049003 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI BAIRD, DONNA D. · 2009 to 2023
$3.3M
ENVIRONMENTAL EFFECTS ON FERTILITYZ01ES049003 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI BAIRD, DONNA D. · 1990 to 2008
$1.1M
UTERINE LEIOMYOMAS--A CASE CONTROL STUDYZ01ES049013 · NIEHS · NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES · PI BAIRD, DONNA D. · 1995 to 2008
$904k
MECHANISTIC STUDIES OF OVARIAN TOXICITYZ01ES021197 · NIEHS · ENVIRONMENTAL HEALTH SCIENCES · PI DAVIS, BARBARA · 1994 to 2003
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6 · The paper itself

Abstract

Phthalates are ubiquitous in our modern environment because of their use in plastics and cosmetic products. Phthalate monoesters--primarily monoethylhexyl phthalate and monobutyl phthalate--are reproductive and developmental toxicants in animals. Accurate measures of phthalate exposure are needed to assess their human health effects. Phthalate monoesters have a biologic half-life of approximately 12 hr, and little is known about the temporal variability and daily reproducibility of urinary measures in humans. To explore these aspects, we measured seven phthalate monoesters and creatinine concentration in two consecutive first-morning urine specimens from 46 African-American women, ages 35-49 years, residing in the Washington, DC, area in 1996-1997. We measured phthalate monoesters using high-pressure liquid chromatography followed by tandem mass spectrometry on a triple quadrupole instrument using atmospheric pressure chemical ionization. We detected four phthalate monoesters in all subjects, with median levels of 31 ng/mL for monobenzyl phthalate (mBzP), 53 ng/mL for monobutyl phthalate (mBP), 211 ng/mL for monoethyl phthalate (mEP), and 7.3 ng/mL for monoethylhexyl phthalate (mEHP). These were similar to concentrations reported for other populations using spot urine specimens. Phthalate levels did not differ between the two sampling days. The Pearson correlation coefficient between the concentrations on the 2 days was 0.8 for mBP, 0.7 for mEHP, 0.6 for mEP, and 0.5 for mBzP. These results suggest that even with the short half-lives of phthalates, women's patterns of exposure may be sufficiently stable to assign an exposure level based on a single first morning void urine measurement.

Indexed as

Environmental ExposureAdultBiomarkersChromatography, High Pressure LiquidFemaleHalf-LifeHumansMiddle AgedPhthalic AcidsReproducibility of ResultsSensitivity and SpecificitySpecimen HandlingUrinalysisBiomarkersPhthalic Acids

Identifiers

PMID12003755
PMCPMC1240840

What OpenQuestion holds

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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.