Estimated mean differences (β) in MSEL and VABS Composite and subscale scores per ln ng/mL increase in child serum PFAS concentrations. Multiple linear regression models were adjusted for CHARGE frequency matching factors (child’s sex and age at sampling, recruitment regional center), sampling year, gestational age at delivery, mother’s birthplace, parity, mother’s race/ethnicity, homeownership, and breastfeeding duration. Shaded areas indicate estimates with a p-value < 0.05.