Table 1 Spearman’s rank correlation coefficient (Spearman’s ρ) between maternal (Ma) PFAS, child (Ch) PFAS and total duration of breastfeeding (BF) in 999 singleton mother-child pairs in the Odense Child cohort

MaPFOS

1.00

MaPFOA

0.59*

1.00

MaPFHxS

0.53*

0.45*

1.00

MaPFNA

0.62*

0.65*

0.44*

1.00

MaPFDA

0.40*

0.42*

0.28*

0.62*

1.00

ChPFOS

0.35*

0.20*

0.28*

0.28*

0.21*

1.00

ChPFOA

0.19*

0.40*

0.22*

0.34*

0.26*

0.75*

1.00

ChPFHxS

0.20*

0.14*

0.31*

0.16*

0.14*

0.86*

0.74*

1.00

ChPFNA

0.14*

0.16*

0.15*

0.30*

0.30*

0.80*

0.75*

0.72*

1.00

ChPFDA

0.13*

0.15*

0.12*

0.22*

0.27*

0.63*

0.60*

0.52*

0.80*

1.00

BF

-0.14*

-0.14*

-0.02

-0.08*

0.02

0.59*

0.60*

0.61*

0.55*

0.40*

1.00