Table 1.
Perfluoroalkyl acid abbreviations, limits of quantification (LOQ), levels above the LOQ, and exposure distributions for included compounds measured in 1,507 serum samples from the Aarhus Birth Cohort, 2008–2013.
| Full name of PFAA | Abbreviation | LOQ | % above LOQ | Median (IQR) | Quartile 1 | Quartile 2 | Quartile 3 | Quartile 4 |
|---|---|---|---|---|---|---|---|---|
| Perfluorohexane sulfonate | PFHxS | 0.08 | 99.9 | 0.5 (0.4–0.6) | < LOQ–0.36 | 0.37–0.47 | 0.48–0.63 | 0.64–6.82 |
| Perfluoroheptane sulfonate | PFHpS | 0.11 | 76 | 0.2 (0.1–0.2) | < LOQ–0.11 | 0.12–0.16 | 0.17–0.21 | 0.22–1.16 |
| Perfluorooctane sulfonate | PFOS | 0.28 | 99.9 | 8.3 (6.0–10.8) | < LOQ–6.02 | 6.03–8.29 | 8.30–10.80 | 10.81–36.10 |
| Perfluorooctanoic acid | PFOA | 0.20 | 99.9 | 2.0 (1.5–2.6) | < LOQ–1.53 | 1.54–2.02 | 2.03–2.64 | 2.65–15.10 |
| Perfluorononanoic acid | PFNA | 0.27 | 99 | 0.8 (0.6–1.0) | < LOQ–0.60 | 0.61–0.75 | 0.76–0.97 | 0.98–4.69 |
| Perfluorodecanoic acid | PFDA | 0.09 | 99 | 0.3 (0.2–0.4) | < LOQ–0.24 | 0.25–0.31 | 0.32–0.42 | 0.43–2.87 |
| Perfluoroundecanoic acid | PFUnA | 0.15 | 87 | 0.3 (0.2–0.4) | < LOQ–0.20 | 0.21–0.29 | 0.30–0.44 | 0.44–2.47 |
| Abbreviations: IQR, Interquartile range; PFAA, perfluoroalkyl acid. All concentrations are in nanograms per milliliter. | ||||||||