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Table 3 Booster response rate and change of overall anti-HBs seropositive rate before and after one booster dose

From: Hepatitis B virus vaccination booster does not provide additional protection in adolescents: a cross-sectional school-based study

Year Seroprevalence, n (%) Subjects, n (%) Post-booster Anti-HBs titer (median)
[birth cohort] Anti-HBs (+) Anti-HBs (−) Booster rate Response rate Anti-HBs (+) Before After
2007 [1992] 90 (53.6) 78 (46.4) 66 (84.6) 55 (83.3) 86.3% 2.1 ± 2.3 399.4 ± 394.0
(P50 = 1.4) (P50 = 288.5)
2008 [1993] 67 (39.4) 103 (60.6) 90 (87.4) 75 (83.3) 83.5% 1.7 ± 2.1 480.7 ± 423.4
(P50 = 0.7) (P50 = 365.5)
2009 [1994] 85 (49.4) 87 (50.6) 76 (87.4) 77 (100.0) 93.6% 1.5 ± 2.2 678.4 ± 385.5
(P50 = 0.3) (P50 = 975.0)
2010 [1995] 61 (35.1) 113 (64.9) 96 (85.0) 85 (87.6) 83.4% 2.7 ± 2.0 540.2 ± 421.2
(P50 = 2.3) (P50 = 556.5)
2011 [1996] 40 (23.7) 129 (76.3) 112 (86.8) 111 (99.1) 89.3% 1.2 ± 2.0 589.3 ± 377.2
(P50 = 0.2) (P50 = 555.4)
2012 [1997] 54 (26.9) 147 (73.1) 130 (88.4) 126 (96.9) 89.5% 2.6 ± 2.8 579.2 ± 387.7
(P50 = 1.7) (P50 = 573.7)
Total 397 (37.7) 657 (62.3) 570 (86.8) 529 (92.5) 87.7% 2.0 ± 2.3 551.5 ± 403.6
       (P50 = 1.1) (P50 = 545.5)