A Centralized Outbreak of Varicella among Children Attending Preschool in Suzhou, China

Table 1

Comparison of children with and without varicella in a varicella outbreak in Suzhou, China, 2016.

Variable	Children with varicella ()	Children without varicella ()	value
Gender			0.055^a
Male	11 (3.1%)	346 (96.9%)
Female	19 (6.2%)	288 (93.8%)
Age (months)
Range	66-77	42-78
Mean (SD)	72.1 (3.3)	57.8 (10.7)
Vaccination status			0.005^a
Unvaccinated	21 (7.0%)	279 (93.0)
Vaccinated	9 (2.5%)	355 (97.5%)
Age at vaccination (months)			1.000^b
<15 months	3 (2.1%)	142 (97.9%)
≥15 months	6 (2.7%)	213 (97.3%)
Time since vaccination before outbreak			0.063^b
<3 years	0 (0.0%)	108 (100%)
≥3 years	9 (3.5%)	247 (96.5%)

^aPearson’s chi-square test. ^bFisher’s exact test.