Chemical exposure
Phthalates in Egyptian premenstrual girls
Open access · cc by · source: Europe PMC
Egyptian girls had much less MBzP than US girls but several-fold more MiBP, especially with plastic food storage.
How this study connects
Role on claims
Each row is a claim on a concept or method page where this paper supports, challenges, or qualifies the statement. Roles are hand-checked — not a model guess.
Among 30 urban and 30 rural premenstrual girls in Gharbiah, Egypt, MEP was highest (urban median 98.8 ng/mL); specific-gravity-adjusted MBzP, MCPP and MiBP were higher in urban girls; MiBP rose with plastic storage and canned food. US NHANES girls had far higher MBzP medians. The sample cannot explain urban–rural breast-cancer differences by phthalates alone.
Evidence for the claim as stated.
Urinary phthalate papers disagree on what a metabolite gap means. Douching frequency tracks MEP (51.6% and 152.2% higher) as a disparity pathway; HOMA-IR-related associations differ by race/ethnicity (MiBP fasting-glucose 5.82 vs 1.79 mg/dL); Egyptian urban medians do not match US MBzP. Spot urine plus self-report cannot prove a single product brand caused the pattern.
Evidence for the claim as stated.
Open questions
Tensions this paper is part of
From concept pages' “where studies disagree.” Disagreement means the same question; scope means different assays, populations, or outcomes.
Urinary phthalate papers disagree on what a metabolite gap means. Douching frequency tracks MEP (51.6% and 152.2% higher) as a disparity pathway; HOMA-IR-related associations differ by race/ethnicity (MiBP fasting-glucose 5.82 vs 1.79 mg/dL); Egyptian urban medians do not match US MBzP. Spot urine plus self-report cannot prove a single product brand caused the pattern.
- Supports · Douching helps explain MEP disparities
- Supports · Phthalates, insulin resistance, and race gaps
Study at a glance
- Design
- Cross-sectional — Pilot urinary phthalate comparison of rural vs urban Egyptian girls and NHANES matches
- N
- N=60 · 30 urban and 30 rural premenstrual girls (mean age 11.5)
- Population
- Premenstrual girls in Gharbiah, Egypt
- Outcome
- Urinary phthalate metabolites (MEP, MiBP, MBzP) by urbanicity and food-storage practices
Structured fields used in claim comparison tables when every cited study has a complete layer.
Inspect source passages
Phthalates in Egyptian premenstrual girls
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
Girls averaged 11.5 years of age.
The study subjects ranged in age from 10-13 years with an average age of 11.5 years.
Urban MEP median was 98.8 ng/mL.
median concentration of 98.8 ng/mL in urban individuals and 40.4 ng/mL in rural individuals.
Key findings
MEP was highest (urban median 98.8 ng/mL); SG-adjusted MBzP, MCPP, and MiBP were higher in urban girls; MiBP rose with plastic storage and canned food; US MBzP medians were far higher.
Methodology
Measured urinary phthalate metabolites in 30 urban and 30 rural premenstrual girls from Gharbiah, Egypt, and compared them with matched NHANES girls.
Limitations
Small sample cannot explain urban–rural breast-cancer differences by phthalates alone.
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