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Table 2 Seroprevalence of anti-VZV IgG antibody among vaccinated and unvaccinated children aged 4 to 6 years

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