Table 2.

Urinary BPA concentrations (µg/g creatinine) during pregnancy in CHAMACOS study participants in samples included in analyses of maternal (n = 335) and neonatal (n = 364) serum TH levels.

Timing of measurement	n	Percentile					Range	GM (GSD)	Detection frequency (%)
		25th	50th	75th
Maternal TH analyses
First half of pregnancy	290	0.6	1.1	1.8	< LOD–27	1.1 (2.3)	82
Second half of pregnancy	317	0.7	1.1	1.9	< LOD–37	1.2 (2.2)	81
Pregnancy average	335	0.8	1.2	1.9	< LOD–19	1.3 (2.0)	82
Neonatal TSH analyses
First half of pregnancy	309	0.7	1.1	1.9	< LOD–27	1.1 (2.3)	83
Second half of pregnancy	344	0.7	1.1	1.8	< LOD–37	1.2 (2.2)	82
Pregnancy average	364	0.8	1.2	1.9	< LOD–24	1.3 (2.0)	82
GSD, geometric standard deviation. LOD = 0.4 µg/L.