| When the Index Case is: | |||
---|---|---|---|---|
 | A child | Staff member with direct contact with children | Staff member swith no contact with children | All staff members |
Number of outbreaks | 45 | 117 | 8 | 125 |
Number of children | 3971 | 9434 | 850 | 10,284 |
Cases in children | 141 | 317 | 37 | 354 |
Cumulative incidence (95% confidence interval) | 3.55% (3.01–4.19) | 3.36% (3.01–3.75) | 4.35% (3.12–6.01) | 3.44% (3.10–3.82) |
Number of staff with direct contact with children | 848 | 1983 | 211 | 2194 |
Cases in staff with direct contact with children | 214 | 744 | 48 | 792 |
Cumulative incidence (95% confidence interval) | 25.24% (22.37–28.33) | 37.52% (35.39–39.70) | 22.75% (17.40–29.12) | 36.10% (34.09–38.15) |
Number of staff with no contact with children | 111 | 399 | 48 | 447 |
Cases in staff with no contact with children | 38 | 61 | 18 | 79 |
Cumulative incidence (95% confidence interval) | 34.23% (25.66–43.92) | 15.29% (11.98–19.28) | 37.50% (24.32–52.67) | 17.67% (14.31–21.60) |
Total number of staff | 959 | 2382 | 259 | 2641 |
Total cases staff | 252 | 805 | 66 | 871 |
Cumulative incidence (95% confidence interval) | 26.28% (23.54–29.21) | 33.80% (31.90–35.74) | 25.48% (20.38–31.32) | 32.98% (31.19–34.82) |
Total (staff and children) | 4930 | 11,816 | 1109 | 12,925 |
Total cases | 393 | 1122 | 103 | 1225 |
Cumulative incidence (95% confidence interval) | 7.97% (7.24–8.77) | 9.50% (8.98–10.04) | 9.29% (7.68–11.19) | 9.48% (8.98–10.00) |