Pregnancy PFAS and lead track lower birth weight
In Cincinnati’s HOME Study, PFAS, lead, and organophosphate pesticides associated with lower birth weight; phthalates and BPA did not.
Source
Gestational exposure to endocrine disrupting chemicals in relation to infant birth weight: a Bayesian analysis of the HOME Study
Study at a glance
- Design
- Cohort — Bayesian hierarchical linear models of gestational EDC biomarkers and birth weight in the HOME Study
- N
- N=272 · 272 of 389 singleton live births with complete covariates; biomarkers at ~16 and 26 weeks
- Population
- Mother–infant pairs in Cincinnati’s HOME Study
- Outcome
- Gestational PFAS, lead, and organophosphate pesticides associated with lower birth weight; phthalates and BPA did not
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Pregnancy PFAS and lead track lower birth weight
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
272 of 389 singleton live births (69.9%) had all covariates and were analyzed.
Of 389 singleton live births, 272 (69.9%) had all covariates and were included in analysis
The phthalates-and-BPA class averaged a 1 g birth-weight association.
The μ β posterior mean for the phthalates and BPA was 1 g with 95% CI (-20, 23)
What they did
Used Bayesian hierarchical linear models (and LASSO/Elastic Net) on 272 of 389 singleton births with gestational biomarkers at ~16 and 26 weeks.
What they found
Nine phthalates plus BPA averaged +1 g per 10-fold exposure; the PFAS class averaged −11 g; all 5 PFAS trended toward lower weight; smoking cut birth weight 210 g.
The limits
What it doesn't show
Does not prove mechanisms, model chemical-class interactions, or capture nonlinear thresholds.
Key terms
- EDC
- Endocrine-disrupting chemical that can alter hormone systems.
- PFAS
- Persistent per- and polyfluoroalkyl substances, including PFOA and PFOS.
- BHLM
- Bayesian hierarchical linear model that shrinks correlated exposure coefficients.
- HOME Study
- Cincinnati prospective birth cohort (Health Outcomes and Measures of the Environment).
- OPP
- Organophosphate pesticide (e.g., DMP, DEP metabolites).
- LASSO
- Penalized regression that can drop weak predictors.
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Analytic HOME Study n:
Common questions
Analytic n?
272 of 389 singleton births.
Where/when recruited?
Cincinnati prenatal clinics, 2003–2006.
Phthalate/BPA class effect?
+1 g, not significant.
PFAS class?
About −11 g per 10-fold (50% CI).
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