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EHP

Erratum Volume 121 | Issue 4 | April 2013

Environ Health Perspect; DOI:10.1289/ehp.121-a114

Erratum: Braun et al. “Variability of Urinary Phthalate Metabolite and Bisphenol A Concentrations before and during Pregnancy” [120:739–745 (2012)]

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Environ Health Perspect 121:A114 (2013). http://dx.doi.org/10.1289/ehp.121-a144 [Published 1 April 2013]


Braun et al. discovered an error in the SAS code of their paper “Variability of Urinary Phthalate Metabolite and Bisphenol A Concentrations before and during Pregnancy” [Environ Health Perspect 120:739–745 (2012)]. The error resulted in the reported absolute concentrations of phthalate metabolites and BPA being approximately 50% higher. The authors mistakenly used the median value from the EARTH study men [specific gravity (SG) = 1.025] rather than women (SG = 1.015) in their SG calculations. Thus, the reported concentrations in Table 2 (columns 2 and 3), Table 4 (columns 2 and 3), and Figure 1, as well as in the Supplemental Material, were higher than if the median SG for this group of women had been used. The authors note that this error did not alter the statistical analyses or their interpretations or the conclusions of their paper.

ehp.121-a114.t001Table 2 – Univariate characteristics, correlations, and difference between SG-adjusted prepregnancy and pregnancy urinary phthalate metabolite and BPA concentrations.

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Table 2Table 4 – Classification probabilities for the top tertile of average gestational BPA or phthalate concentration according to trimester-specific surrogate categories.

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Figure 1Figure 1 – Box plots of average gestational SG-adjusted urinary phthalate metabolite or BPA concentrations according to trimester-specific tertiles. Surrogate measures (first, second, or third trimester) were divided into tertiles. The displayed values are the minimum (bottom whisker), 25th percentile (bottom of box), median (line in box), mean (diamond), 75th percentile (top of box), and maximum (top whisker) of the average gestational urinary phthalate and BPA concentrations. Limited to women with all three pregnancy urine samples. All concentrations are SG adjusted. n = 77 for phthalate analysis; n = 91 for BPA analysis. DEHP metabolites: mono(2-ethyl-5-carboxypentyl) phthalate (MECPP), mono(2-ethyl-5-hydroxyhexyl) phthalate (MEHHP), mono(2-ethyl-5-oxohexyl) phthalate (MEOHP), and mono(2-ethylhexyl) phthalate (MEHP).

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The authors regret the error.


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