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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 (%) |
|---|---|
| 0 | 5/167 (3) |
| 0.5 | 3/6 (50) |
| 1 | 54/65 (83) |
| 2 | 8/8 (100) |
By the chi-square test for independence, χ2 was 169.9 (P < 0.0001).
