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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