Table 1:

Intra-class correlations (ICC) of OPE urinary metabolites. Measurements were taken at 16 weeks pregnancy, 26 weeks pregnancy, and delivery. Crude values represent non-creatinine standardized concentrations.

Urinary metabolite	Crude ICC	Creatinine-standardized ICC
BCEP	0.40	0.34
BDCIPP	0.38	0.36
DNBP	0.25	0.20
DPHP	0.24	0.16