TABLE 1.

Case Characteristics Among Vaccinated Students, Unvaccinated Students, and Students With Varicella Disease History, School A, Maine

VariableVaccinated StudentsUnvaccinated StudentsStudents With Varicella HistoryP Value*
n (%)146 (49)51 (17)99 (34)
Varicella disease during the outbreak, n12365
    Age, mo
        Median789075.04
        Range60–10170–10774–93
    Severity of illness, n (%).005
        Mild9 (75)8 (22)2 (40)
        Moderate3 (25)20 (56)3 (60)
        Severe0 (0)8 (22)0 (0)
    Duration of rash, d
        Median577.03
        Range4–104–205–9
    Days missed from school
        Median354.01
        Range0–50–100–5
    Complications, n (%)0 (0)2 (5.6)0 (0)
    Hospitalization, n (%)0 (0)1 (2.8)0 (0)
  • * P values for comparison of disease characteristics between vaccinated and unvaccinated students.