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WQS regression model weights of each individual PFAS contributing to the overall co-pollutant mixture effect (Beta [95% CI] = −0.35 [-0.52, −0.17], p-value = 0.0003) in the index. The black dotted line shows the selection threshold (1/9). Adjusted for maternal age, gestational age at which SARS-CoV-2 IgG titer was measured, COVID-19 vaccination status prior to IgG titer measurement, maternal race/ethnicity, parity, type of insurance and pre-pregnancy BMI.
