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Table 4 Hemagglutination antibody titers during the second influenza season based on TIV or pH1N1 vaccination status of schoolchildren participants

From: Geographical heterogeneity and influenza infection within households

Participants(schoolchildren) TIV(-) N = 172 TIV(+) N = 99
pH1N1(-) N = 17 pH1N1(+) N = 155 P pH1N1(-) N = 6 pH1N1(+) N = 93 P
Pre-vaccination       
HI-titer40       
  pH1N1 11(0.65) 112(0.72)   4(0.67) 68(0.73)  
  H1N1 14(0.82) 141(0.91)   4(0.67) 87(0.94)  
  H3N2 13(0.77) 129(0.83)   5(0.83) 72(0.77) *
  B 5(0.29) 39(0.25)   2(0.33) 24(0.26)  
GMT #       
  pH1N1 48.24(28.72,67.75) 56.77(49.45,64.10)   65.00(7.23,122.77) 57.58(48.92,66.24)  
  H1N1 162.94(79.96,245.92) 274.84(217.97,331.71) * 433.33(-64.89,931.55) 411.51(235.43,587.58)  
  H3N2 207.06(42.89,371.22) 210.61(166.67,254.56)   107.50(40.65,174.35) 254.84(171.02,338.65) *
  B 17.65(9.77,25.52) 26.65(21.64,31.65) * 66.67(-64.31,197.64) 28.49(21.90,35.09)  
Post-vaccination       
HI-titer40       
  pH1N1 2(0.12) 101(0.65) * 2(0.33) 52(0.56) *
  H1N1 4(0.24) 108(0.70) * 3(0.50) 58(0.62) *
  H3N2 4(0.24) 110(0.71) * 4(0.67) 57(0.61)  
  B 2(0.12) 70(0.45) * 3(0.50) 36(0.39)  
GMT #       
  H1N1_p 49.41(30.22,68.60) 216.65(167.73,265.56) * 84.17(14.68,153.65) 228.60(154.87,302.33) *
  H1N1 202.94(40.19,365.69) 430.58(319.28,541.88) * 270.00(45.61,494.39) 327.63(245.00,410.27)  
  H3N2 220.00(58.35,381.65) 516.94(430.86,603.01) * 213.33(-9.85,436.51) 471.24(380.18,562.29) *
  B 23.24(10.48,35.99) 49.03(39.89,58.17) * 148.33(-3.62,300.29) 42.15(33.09,51.21)  
  1. *p < 0.05.
  2. #numbers in brackets are 95% confidence interval calculated by GEE method.