From: Seroprevalence and molecular characteristics of varicella-zoster virus infection in Chinese children
Vaccinated | Unvaccinated | χ2 | P | |||
---|---|---|---|---|---|---|
IgG Positive (%) | IgG Negative (%) | IgG Positive (%) | IgG Negative (%) | |||
Total | 735 (54.4) | 616 (45.6) | 812 (49.2) | 840 (50.8) | 8.206 | 0.004 |
4 years | 153 (49.4) | 156 (50.6) | 284 (46.7) | 324 (53.3) | 0.538 | 0.463 |
5 years | 220 (50.9) | 207 (49.1) | 253 (49.4) | 259 (50.6%) | 0.334 | 0.563 |
6 years | 362 (58.9) | 253 (41.1) | 275 (51.7) | 257 (48.3) | 5.652 | 0.017 |
Trend χ2 = 17.202, P = 0.002 | Trend χ2 = 8.681, P = 0.070 |