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Table 1 Linear regression multivariable analyses of the magnitude of the initial response to the vaccine one month after the second dose of the BNT162B2 vaccine (T1) and loss of anti-S IgG titers at the short- (T1-T4) and long-term (T1-T8)

From: Higher plasma levels of thymosin-α1 are associated with a lower waning of humoral response after COVID-19 vaccination: an eight months follow-up study in a nursing home

Parameter

β coefficient (95% CI)

p

Anti-S antibody titers (T1)

 Age (years)

−0.512 (− 0.021 to 0.001)

0.100

 Albumin (g/dL)

0.134 (− 0.197 to 0.434)

0.455

 Total IgM (mg/dL)

0,1185 (−0.001 to 0.002)

0.599

 Total IgG (mg/dL)

0.189 (0.000 to 0.001)

0.295

 Folate (ng/mL)

−0.068 (− 0.483 to 0.365)

0.062

 Calcium (mg/dL)

0.030 (−0.213 to 0.256)

0.855

 Homocysteine (mg/L)

−0.155 (− 0.241 to − 0.068)

0.001

 β2-microglobulin (mg/L)

0.264 (− 0.012 to 0.162)

0.089

 hsCRP (mg/L)

− 0.085 (− 0.026 to 0.013)

0.502

 CD3 (cells/μL)

− 0.039 (0.000 to 0.000)

0.753

 B cells (cells/μL)

0.142 (0.000 to 0.002)

0.257

Short-term loss of anti-S antibody titers (T1-T4)

 Total IgA (mg/dL)

0.010 (−0.012 to 0.031)

0.373

 Total IgM (mg/dL)

−0.020 (− 0.055 to 0.015)

0.253

 hsCRP (mg/L)

0.440 (−0.368 to 1.248)

0.280

 Thymosin-α1 (ng/mL)

−0.168 (− 0.305 to − 0.031)

0.017

 sj/β-TRECs ratio

− 0.558 (−1.118 to 0.002)

0.074

Long-term loss of anti-S antibody titers (T1-T8)

 Total IgM (mg/dL)

−0.017 (− 0.037 to 0.003)

0.089

 Thymosin-α1 (ng/mL)

− 0.123 (− 0.212 to − 0.034)

0.008

  1. T1 one month after the second dose, T4 four months after the second dose, T8 eight months after the second dose, CI Confidence interval, hsCRP high sensitivity C-reactive protein