Table 3 Case control study on risk factors of acute gastroenteritis outbreak caused by Sapovirus

See others vomiting

278

58

365

46

1.58

1.26

1.99

15.6

0.00

See others vomiting in the classroom

120

25

138

17

1.56

1.19

2.06

10.14

0.00

See others vomiting in the playground

36

7

35

4

1.74

1.08

2.81

5.22

0.02

Less than 1.5 m from vomit

156

32

166

21

1.42

1.04

1.95

4.81

0.03

Handling vomitus

45

9

36

5

2.17

1.37

3.41

11.57

0.00

See others Vomiting on bus

86

18

116

15

1.25

0.92

1.7

2.11

0.15

See others Vomiting during activity

14

3

30

4

0.76

0.4

1.44

0.72

0.40

See others Vomiting in bathroom

56

12

71

9

1.33

0.92

1.93

2.28

0.13

Self protection in handling

12

27

7

19

1.93

0.69

5.4

1.62

0.20

Family members in the same school

116

24

170

22

1.15

0.88

1.51

1.06

0.30