Table 1 Comparison of positive rate for neutralizing antibody and positive conversion rate before and after immunization.
Serotype | Parameter | Group a (N = 69) | Group b (N = 68) | Group c (N = 68) | χ2 | P | |||
|---|---|---|---|---|---|---|---|---|---|
N | % | N | % | N | % | ||||
Type I | |||||||||
Before | Positive rate | 26 | 37.68 | 35 | 51.47 | 25 | 37.76 | 3.798 | 0.150 |
After | Positive rate | 69 | 100.00 | 68 | 100.00 | 68 | 100.00 | - | - |
Positive conversion rate | 43 | 100.00 | 33 | 100.00 | 43 | 100.00 | 3.793 | 0.150 | |
Type II | |||||||||
Before | Positive rate | 35 | 50.72 | 35 | 51.47 | 25 | 37.76 | 3.761 | 0.153 |
After | Positive rate | 68 | 98.55 | 68 | 100.00 | 67 | 98.53 | - | - |
Positive conversion rate | 33 | 97.06 | 33 | 100.00 | 42 | 97.67 | 3.373 | 0.185 | |
Type III | |||||||||
Before | Positive rate | 7 | 10.14 | 11 | 16.18 | 11 | 16.18 | 1.371 | 0.504 |
A fter | Positive rate | 69 | 100.00 | 68 | 100.00 | 68 | 100.00 | - | - |
Positive conversion rate | 62 | 100.00 | 57 | 100.00 | 57 | 100.00 | 1.438 | 0.487 | |
