Table 2.
PFAS plasma concentrations (ng/mL) and Spearman correlations between PFASs measured in Project Viva participants (n=1614)
| PFAS | % >LOD | Geometric mean | 25% | median | 75% | 95% |
|---|---|---|---|---|---|---|
| PFOS | 99.8 | 25.4 | 18.8 | 25.7 | 34.9 | 57.3 |
| PFOA | 100 | 5.7 | 4.2 | 5.9 | 7.9 | 12.1 |
| PFHxS | 99.3 | 2.5 | 1.6 | 2.5 | 3.8 | 9.1 |
| PFNA | 98.6 | 0.7 | 0.5 | 0.7 | 0.9 | 1.5 |
| EtFOSAA | 99.7 | 1.2 | 0.7 | 1.2 | 1.9 | 4.3 |
| MeFOSAA | 100 | 1.9 | 1.3 | 1.9 | 3.2 | 5.6 |
| Correlation coefficients | ||||||
| PFOS | PFOA | PFHxS | PFNA | EtFOSAA | MeFOSAA | |
| PFOS | 1.00 | |||||
| PFOA | 0.71 | 1.00 | ||||
| PFHxS | 0.50 | 0.52 | 1.00 | |||
| PFNA | 0.60 | 0.52 | 0.42 | 1.00 | ||
| EtFOSAA | 0.52 | 0.39 | 0.21 | 0.19 | 1.00 | |
| MeFOSAA | 0.40 | 0.37 | 0.23 | 0.23 | 0.40 | 1.00 |
1
LOD: limit of detection (0.2 ng/mL for PFOS and 0.1 ng/mL for all other PFAS chemicals). Concentrations below the limit of detection were imputed as LOD/√2).
2
PFOA: perfluorooctanoic acid; PFOS: perfluorooctanesulfonic acid; PFNA: perfluorononanoic acid; PFHxS: perfluorohexane sulfonic acid; EtFOSAA: 2-(N-ethyl-perfluorooctane sulfonamido) acetic acid; MEFOSAA: 2-(N-methyl-perfluorooctane sulfonamido) acetic acid