Table 1 Basic information of outbreaks in two schools, 2018
Variables | County ethnic primary school | Township central primary school | P value |
|---|---|---|---|
Number of students (staff) in school | 515(44) | 730(54) | Â |
Number of cases among students (staff) | 170(1) | 159(1) | Â |
Number of classes (grades) in school | 12(3) | 19(6) | Â |
Number of classes (grades) case occurred | 12(3) | 19(6) | Â |
Average (max, min) number of cases in class | 14.17(29,2) | 8.32(20,1) | Â |
Date of onset for index case (date/month) | 18/5 | 23/5 | Â |
Date of onset for last case (date/month) | 10/7 | 6/7 | Â |
Epidemic duration (day) | 54 | 45 | Â |
Number of cases (attack rate %) | 171(30.59) | 160(20.41) | <0.001 |
Disease course (day)- average (max, min) | – | 9.40(7, 23) |  |
Characteristic of cases | |||
 Gender (%) |  |  | <0.001 |
  male | 89(52.05) | 117(73.12) |  |
  female | 82(47.95) | 43(26.88) |  |
 Age- median (max, min) | 12.34(9.91, 29.53) | 11.00(7, 37) |  |