TABLE 1

Characteristics of children with varicella according to vaccination statusj

Clinical characteristicValueP value
Vaccinated patients (n = 139)Unvaccinated patients (n = 13)
Age (mo)
    Mean ± SD4.63 ± 2.893.85 ± 3.160.2264i
    Median43
    Range (min–max)1–141–9
No. (%) of females67 (48.2)4 (30.8)0.2598
No. (%) with a weekday location of:0.0411
    Day care84 (60.9)4 (30.8)
    School29 (21.0)3 (23.1)
    Home20 (14.5)6 (46.1)
    Cramming school5 (3.6)0 (0.0)
Median no. of days with rash (range)5 (1–24)a6 (4–14)b0.0547i
No. (%) with lesions
    <5065 (47.4)c4 (30.7)0.4606
    50–24956 (40.9)7 (53.8)
    250–49913 (9.5)1 (7.7)
    >5003 (2.1)1 (7.7)
No. (%) with itchy rash94 (68.1)d9 (69.2)0.9342
No. (%) who developed scabs104 (74.8)11 (84.6)0.4313
No. (%) with fever24 (17.2)3 (23.0)0.6001
No. (%) with a moderate illness severity reported by parents62 (50.0)e10 (83.3)f0.0026
No. (%) with parents who missed work8 (6.0)g1 (7.6)
No. (%) cared for at outpatient clinics133 (95.6)10 (76.9)0.0079h
  • a For vaccinated patients, total n = 124.

  • b For unvaccinated patients, total n = 11.

  • c For vaccinated patients, total n = 137.

  • d For vaccinated patients, total n = 138.

  • e For vaccinated patients, total n = 124.

  • f For unvaccinated patients, total n = 12.

  • g For vaccinated patients, total n = 133.

  • h Cochran-Mantel-Haenszel test was used.

  • i P value was obtained by a Mann-Whitney U test, and the rest of the P values were obtained by a chi-square test.

  • j Clinical severity was not available for all cases.