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AMB Express

Table 1 Summary and comparing of HI titers to B/Y and B/V lineages in 2016–2017

From: Increasing serum antibodies against type B influenza virus in 2017–2018 winter in Beijing, China

Sera cohorts

Group1 (N = 69) No. (%)

Group2 (N = 75) No. (%)

Group3 (N = 46) No. (%)

P value (3 groups)

P value (group 2 to 3)

P value (CHI to adults†)

B/Yamagataa

14 (20.29)

19 (25.33)

9 (19.57)

0.69

0.47

0.65

B/Victoriab

13 (18.84)

18 (24.00)

10 (21.74)

0.76

0.78

0.49

P value

1.00

1.00

1.00

–

–

–

  1. The percentages were estimated as a fraction of total cases belonging to each category. P values were estimated using χ2 tests or Fisher’s exact tests (between B/Y and B/V of each group)
  2. †CHI: summary of group 2 and group 3 to represent samples from children. Adults: samples from adult in group 1
  3. aB/Beijing/BTCH_71/2018 was used as antigen representative of B/Yamagata lineage virus
  4. bB/Jiangxi_Yushui/11102/2014 was used as antigen representative of B/Victoria lineage virus
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