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Table 2 Distribution of serum phthalates, parabens, and phenols in study participants (N = 264), Wisconsin Breast Density Study, 2008 to 2009

From: Circulating serum xenoestrogens and mammographic breast density

  Limit of detection No. (%) with detectable levels Median detectable valuea Maximum detected value
Mono-ethyl phthalate (ng/ml) 0.11 37 (14.1) 3.77 55.8
Mono-butyl phthalate (ng/ml) 1.00 5 (1.9) NAb 136
Mono-benzyl phthalate (ng/ml) 0.10 1 (0.4) NAb 0.2
Propyl paraben (ng/ml) 0.07 175 (66.5) 0.46 630.0
Butyl paraben (ng/ml) 0.02 143 (54.2) 0.13 2.26
Octylphenol (ng/ml) 0.25 35 (13.3) 1.78 58.2
Nonylphenol (ng/ml) 0.06 109 (41.3) 16.8 725.0
Bisphenol A (ng/ml) 0.24 69 (26.3) 0.55 8.77
  1. aRefers to the median of serum levels among samples with detectable values (that is, excluding nondetectable samples). bNot available; summary statistics were not calculated because of insufficient numbers of subjects with detectable levels.