Table 2.

Distribution of per- and polyfluoroalkyl substances (PFAS) plasma concentrations measured at baseline in the Diabetes Prevention Program trial.

PFAS analyte	Chemical name	Below LODa$n$ (%)	Geometric mean (ng/mL) (IQR)
PFOS	Perfluorooctane sulfonic acid	0	26.38 (22.80)
n-PFOS	Linear perfluorooctane sulfonic acid	0	18.42 (16.90)
Sm-PFOS	Perfluoromethylheptane sulfonic acids	0	7.32 (6.50)
Sm2-PFOS	Perfluorodimethylhexane sulfonic acids	564 (58.93%)	0.13 (0.23)
PFOA	Perfluorooctanoic acid	0	4.82 (3.20)
n-PFOA	Linear perfluorooctanoic acid	0	4.29 (2.90)
Sb-PFOA	Branched perfluorooctanoic acids	159 (16.61%)	0.44 (0.50)
PFHxS	Perfluorohexane sulfonic acid	1 (0.10%)	2.41 (2.40)
Et-PFOSA-AcOH	N-ethyl-perfluorooctane sulfonamido acetic acid	32 (3.34%)	1.13 (1.50)
Me-PFOSA-AcOH	N-methyl-perfluorooctane sulfonamido acetic acid	29 (2.59%)	0.94 (1.10)
PFNA	Perfluorononanoic acid	65 (6.79%)	0.53 (0.40)

^a$\text{Limit}\text{of}\text{detection}\left(\text{LOD}\right)=0.1\text{ng}/\mathrm{mL}$ for all PFAS.