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Table 2 Summary of outbreaks and cases in preschools and schools reported or notified to the NCTT

From: Experience with open schools and preschools in periods of high community transmission of COVID-19 in Norway during the academic year of 2020/2021

 

Preschools

Primary

Combineda

Lower secondary

Upper secondary

Total

Outbreaks (n (%))

298 (25)

457 (40)

33 (3)

190 (16)

225 (19)

1203

Pupils only

58 (10)

230 (40)

18 (3)

125 (22)

143 (25)

574

Staff only

51 (71)

13 (18)

0 (0)

1 (1)

7 (10)

72

 ≥ 20 cases

8 (20)

17 (43)

2 (5)

5 (13)

8 (20)

40

Cases (n (%))

1447 (22)

2446 (37)

255 (4)

1018 (16)

1376 (21)

6530

Pupils/children

799 (16)

1917 (38)

214 (4)

894 (18)

1208 (24)

5032

Staff members

648 (43)

528 (35)

41 (3)

124 (8)

157 (10)

1498

Infected staff per infected pupils/children

0.8

0.3

0.2

0.1

0.1

3.4

Mean (SDb), per outbreak 

4.9 (4.5)

5.4 (5.6)

7.7 (7.6)

5.4 (5.8)

6.1 (8.2)

5.4 (6.0)

Median (IQRc), per outbreak 

3 (2–5)

3 (2–6)

4 (3–10.5)

3 (2–6)

4 (2–7)

3 (2–6)

Range

2–30

2–52

2–34

2–55

2–72

2–72

  1. aCombined primary and lower secondary schools
  2. bStandard deviation
  3. cInterquartile range