Table 3 Correlation between sergroup-polysaccharide specific IgG levels and functional antibody titers (rSBA) in saliva measured before (T0), one month (T1) and one year (T2) after the vaccination

MenA

0.11 (− 0.03–.025), 0.11

0.11 (− 0.03–0.24), 0.13

0.06 (− 0.08–0.20), 0.42

0.36 (0.28–0.42), < 0.001

MenC

0.37 (0.29–0.45), < 0.001

0.54 (0.47–0.61), < 0.001

0.53 (0.46–0.60), < 0.001

0.85 (0.84–0.87), < 0.001

MenW

0.06 (− 0.08–0.20), 0.37

0.16 (0.02–0.29), 0.02

0.25 (0.11–0.37), 0.001

0.60 (0.54–0.65), < 0.001

MenY

0.02 (−0.12–0.15), 0.82

0.09 (− 0.05–0.23), 0.19

0.19 (0.05–0.32), 0.007

0.76 (0.72–0.79), < 0.001