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Table 2 Descriptive statistics of PFAS concentrations in maternal plasma and thyroid hormone concentrations in cord plasma

From: Prenatal exposure to perfluoroalkyl substances and thyroid hormone concentrations in cord plasma in a Chinese birth cohort

  >LOD (%) Percentiles GM (SD)
5th 25th 50th 75th 95th
PFAS (N = 300, ng/mL)
PFHxS 100 1.29 2.04 2.67 3.40 5.48 2.66 (1.51)
PFOS 100 4.04 7.34 10.49 16.30 26.47 10.77 (1.80)
PFOA 100 9.17 14.49 19.38 26.80 38.00 19.41 (1.56)
PFNA 100 0.84 1.38 1.80 2.51 3.88 1.82 (1.60)
PFDA 100 0.75 1.41 2.15 3.28 6.30 2.15 (1.91)
PFUdA 100 0.54 1.04 1.68 2.55 4.38 1.61 (1.95)
PFDoA 91.04 0 0.05 0.11 0.20 0.39 0.09 (3.09)
PFTrDA 88.93 0 0.04 0.11 0.18 0.37 0.09 (2.95)
Thyroid hormones (N = 300)
T3 (nmol/L) 100 0.67 0.77 0.84 0.94 1.10 0.85 (1.18)
FT3 (pmol/L) 98 1.34 1.53 1.76 2.00 2.42 1.77 (1.21)
T4 (nmol/L) 100 49.30 77.67 93.10 109.90 143.65 90.63 (1.36)
FT4 (pmol/L) 100 11.08 12.82 14.14 15.39 17.81 14.10 (1.15)
TSH (μIU/mL) 100 2.24 4.32 6.50 9.72 18.97 6.49 (1.87)
  1. LOD Limit of detection, GM Geometric mean, SD Standard deviation, PFHxS Perfluorohexane sulfonic acid, PFOS Perfluorooctane sulfonate, PFOA Perfluorooctanoic acid, PFNA Perfluorononanoic acid, PFDA Perfluorodecanoic acid, PFUdA Perfluoroundecanoic acid, PFDoA Perfluorododecanoic acid, PFTrDA Perfluorotridecanoic acid, PFTeDA Perfluorotetradecanoic acid, PFHxDA Perfluorohexadecanoic acid, PFDS Perfluorodecane sulfonate; T3, total triiodothyronine, T4 Total thyroxine, FT3 Free triiodothyronine, FT4 Free thyroxin, TSH Thyroid stimulating hormone