Table 2.
Prenatal PFOA and long-chain PFCAs concentrations in serum samples in the Taiwan Maternal and Infant Cohort Study, 2000–2001.
| Prenatal exposure (ng/mL) | Molecular formula | Detection rate (%) | Geometric mean (95% CI) | Mina | 25th | 50th | 75th | 90th | Max |
|---|---|---|---|---|---|---|---|---|---|
| Female (n = 106) | |||||||||
| PFOA | C7F15CO2H | 86 | 1.98 (1.69, 2.32) | 0.39 | 1.57 | 2.34 | 3.43 | 4.64 | 7.70 |
| PFNA | C8F17CO2H | 97 | 1.44 (1.19, 1.74) | 0.08 | 0.84 | 1.58 | 2.42 | 4.54 | 10.30 |
| PFDeA | C9F19CO2H | 75 | 0.37 (0.32, 0.42) | 0.16 | 0.16 | 0.43 | 0.64 | 0.83 | 1.24 |
| PFUnDA | C10F21CO2H | 90 | 2.89 (2.12, 3.94) | 0.10 | 1.46 | 3.31 | 9.15 | 14.05 | 38.00 |
| PFDoDA | C11F23CO2H | 82 | 0.30 (0.25, 0.35) | 0.06 | 0.23 | 0.37 | 0.51 | 0.67 | 1.26 |
| Male (n = 117) | |||||||||
| PFOA | C7F15CO2H | 85 | 1.97 (1.67, 2.31) | 0.39 | 1.35 | 2.37 | 3.47 | 4.60 | 13.50 |
| PFNA | C8F17CO2H | 97 | 1.39 (1.16, 1.66) | 0.08 | 0.92 | 1.55 | 2.60 | 4.24 | 10.25 |
| PFDeA | C9F19CO2H | 73 | 0.40 (0.35, 0.46) | 0.16 | 0.16 | 0.46 | 0.72 | 0.96 | 1.57 |
| PFUnDA | C10F21CO2H | 92 | 3.12 (2.36, 4.14) | 0.10 | 1.67 | 3.52 | 9.35 | 15.40 | 43.10 |
| PFDoDA | C11F23CO2H | 80 | 0.28 (0.23, 0.33) | 0.06 | 0.19 | 0.37 | 0.56 | 0.73 | 1.17 |
| Abbreviations: Max, maximum; Min, minimum. 25th, 50th, 75th, and 90th are percentiles. aMinimum values correspond to imputed values for concentrations < LOQ. Values were imputed as expected values (E) conditional on being below the LOQ (E[x|x ≤ LOQ]). | |||||||||