Table 3.

Relationship between rapid test IgG score and hemagglutination-inhibition titera

Rapid test IgG score No. of specimens with a hemagglutination-inhibition titer of ≥1:2,560/total no. tested (%)
05/167 (3)
0.53/6 (50)
154/65 (83)
28/8 (100)
  • a By the chi-square test for independence, χ2 was 169.9 (P < 0.0001).