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Table 2 Estimated parameters of the decay of serum-bactericidal antibody titers after meningococcal polysaccharide vaccination

From: Persistence of antibodies in laboratory staff immunized with quadrivalent meningococcal polysaccharide vaccine

Serogroup

L0(CI)

k (CI)

λ (CI)

A

834.1 (219; 3,176.5)

−0.025 (−0.048; -0.003)

27.4 (14.5; 248.9)

C

2,522.2 (442.2; 14,387.8)

−0.032 (−0.061; -0.002)

21.9 (11.3; 343.7)

W135

541.5 (73.0; 4,016.4)

−0.037 (−0.070; -0.003)

18.8 (9.8; 224.1)

Y

1,687 (413.3; 6,886.5)

−0.025 (−0.048; -0.001)

28.0 (14.3; 641.6)

  1. L 0 : titer after vaccination, CI: 95% confidence interval, k: first-order rate constant, λ: half-life in months (derived from k).