Table 2 Attack rates of the outbreak across different demographic characteristics
Characteristics | No. of cases | Total | Attack rate (%) |
|---|---|---|---|
Overall | 278 | 1995 | 13.9 |
Sex | |||
Male | 125 | 890 | 14.0 |
Female | 153 | 1105 | 13.8 |
Occupation | |||
Students in grades 1-6 | 183 | 831 | 22.0 |
Students in grades 7-9 | 55 | 594 | 9.3 |
Students in grades 10-12 | 16 | 268 | 6.0 |
Teachers | 18 | 252 | 7.1 |
Cafeteria food handlers | 6 | 50 | 12.0 |
Boarding status (only students) | |||
Boarding | 223 | 1373 | 16.2 |
Not boarding | 31 | 320 | 9.7 |