Table 4.
Relationship between within-woman geometric mean prepregnancy and pregnancy urinary paraben concentrations among 129 women.a
| Analyte | Uncorrected median (IQR) | SG-corrected median (IQR) | Relative change (95% CI)b | |||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Prepregnancy | Pregnancy | Prepregnancy | Pregnancy | |||||||
| MP (µg/L) | 162 (63.6, 334) | 135 (51.3, 287) | 201 (103, 400) | 185 (69.3, 348) | 0.75 (0.64, 0.88) | |||||
| PP (µg/L) | 36.1 (13.6, 78.2) | 22.8 (7.33, 75.2) | 46.4 (20.1, 98.3) | 36.3 (10.3, 89.9) | 0.68 (0.56, 0.82) | |||||
| BP (µg/L) | 2.39 (0.45, 5.45) | 0.88 (0.25, 2.88) | 2.96 (0.73, 8.36) | 1.23 (0.42, 4.03) | 0.55 (0.45, 0.67) | |||||
| aThe median of the within-woman GM paraben urinary concentrations are presented (n = 129 women contributing 575 urine samples prepregnancy; n = 129 women contributing 337 urine samples during pregnancy). bResults from a mixed-effects linear regression model evaluating the change in SG-corrected MP, PP, and BP during pregnancy compared with before pregnancy (no additional covariates were included in the model). The relative change from the reference category (prepregnancy) is presented; n = 912 urine samples were included in the model: 575 prepregnancy and 337 during pregnancy. | ||||||||||