Table 5 GEE regression results with interaction of PFOA (top) and PFOS (bottom) and days from first vaccine to explain outcome in log2 anti-S antibody AUC.

From: Immune response to COVID-19 vaccination in a population with a history of elevated exposure to per- and polyfluoroalkyl substances (PFAS) through drinking water

 

Day 0 to day 68 after first vaccinea (initial increase phase)

Day 42 to day 103 after first vaccineb (waning phase)

 

Percent change (95% CI)

P-value

Percent change (95% CI)

P-value

Age

−1.2 (−3.1, 0.8)

0.24

−2.7 (−4.1, −1.4)

<0.001

Female vs. Male

−15.2 (−56.1, 63.6)

0.62

2.2 (−31.7, 52.6)

0.92

Geographical site

−20.8 (−63.1, 69.9)

0.55

−10.1 (−42.2, 39.5)

0.64

History of COVID-19 (naive vs. recovered)

1860 (924.2, 3650.7)

<0.01

47.4 (−0.7, 118.9)

0.05

Vaccine Brand (Moderna vs. Pfizer-BioNTech)

−31.7 (−73.1, 73)

0.42

−36.3 (−60.8, 3.5)

0.07

log2 serum PFOA concentration

−0.1 (−48.8, 21.9)

0.46

0.4 (−5, 93)

0.08

Visit 3 vs. baseline

71218.1 (27765.8, 182427.5)

<0.01

  

Visit 3 × log2 serum PFOA concentration

30.4 (−9.7, 70.5)

0.14

  

Days from first vaccine

  

−1.4 (−2.7, 0.7)

0.19

Days from first vaccine × log2 serum PFOA concentration

  

−1 (−1, 0.2)

0.17

Age

−1.2 (−3.2, 0.7)

0.22

−2.7 (−4.1, −1.4)

<0.001

Female vs. Male

−15.2 (−55.9, 63)

0.62

1.4 (−32.2, 51.6)

0.95

Geographical site

−21.6 (−60.6, 55.8)

0.49

−19.9 (−46.8, 21.4)

0.3

History of COVID-19 (naive vs. recovered)

1884.8 (934.5, 3708.2)

<0.01

47.4 (−0.7, 118.9)

0.05

Vaccine Brand (Moderna vs. Pfizer-BioNTech)

−29.6 (−72.5, 80.1)

0.46

−34 (−59.1, 6.4)

0.09

log2 serum PFOS concentration

−0.1 (−42.7, 29.6)

0.72

0.3 (−30, 94)

0.31

Visit 3 vs. baseline

67965.9 (18340.8, 251135.1)

<0.01

  

Visit 3 × log2 serum PFOS concentration

20.2 (−25.9, 66.4)

0.39

  

Days from first vaccine

  

−0.7 (−3.4, 1.4)

0.44

Days from first vaccine × log2 serum PFOS concentration

  

−0.3 (−1, 1)

0.41

  1. GEE generalized estimating equation, AUC area under the curve. CI confidence interval. PFOA Perfluorooctanoic acid (top), PFOS Perfluorooctanesulfonic acid (bottom).
  2. a187 individuals with at least one anti-S antibody AUC in phase 1 were included in analysis.
  3. b215 individuals with at least one anti-S antibody AUC in phase 2 were included in analysis.