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Table 2 Risk factors for Norovirus or C. difficile infection

From: Risk factors for contagious gastroenteritis in adult patients with diarrhoea in the emergency department - a prospective observational multicentre study

Β 

Norovirus

C. difficile

Negative patients

Positive patients

OR

95% CI

Negative patients

Positive patients

OR

95% CI

n

%

n

%

Β Β 

n

%

n

%

Β Β 

Total

142

87

21

13

Β Β 

149

87

22

13

Β Β 

Sex

 Female

89

97

3

3

1

Β 

81

87

13

14

1

Β 

 Male

53

75

18

25

10

2.8–36.5

68

89

9

12

0.8

0.3–2.0

Age (years)

 17–45

27

77

8

23

1

Β 

36

95

2

5

1

Β 

 46–65

31

91

3

9

0.3

0.1–1.4

32

94

2

6

1.1

0.1–8.5

 66–75

36

92

5

13

0.4

0.1–1.4

36

90

4

10

2

0.3–11.6

 76–99

48

91

5

9

0.4

0.1–1.1

42

75

14

25

6

1.3–28.2

Medical History

 Duration of diarrhoea

  1 day

26

63

15

37

1

Β 

39

95

2

5

1

Β 

  2–3 days

44

92

4

8

0.2

0.05–0.5

47

96

2

4

0.8

0.1–6.2

  > 3 days

67

97

2

3

0.05

0.01–0.2

60

79

16

21

5.2

1.1–23.9

Number of defaecation on day of onset

 1–3 defaecations

38

90

4

10

1

Β 

40

93

3

7

1

Β 

 4–10 defaecations

69

87

10

13

1.4

0.4–4.7

66

80

17

20

3.4

0.9–12.5

 > 10 defaecations

29

81

7

19

2.3

0.6–8.6

36

97

1

3

0.4

0.03–3.7

Duration of vomiting

 No vomitting

51

88

7

12

1

Β 

49

83

10

17

1

Β 

 1 day

33

73

12

27

2.6

0.9–7.4

48

98

1

2

0.1

0.01–0.8

 > 1 day

53

96

2

4

0.3

0.05–1.4

49

86

8

14

0.8

0.3–2.2

Number of vomits on day of onset

 No vomitting

55

90

6

10

1

Β 

55

86

9

14

1

Β 

 1–3 vomtis

38

95

2

5

0.5

0.1–2.5

36

84

7

16

1.2

0.4–3.5

 4–10 vomits

25

83

5

17

1.8

0.5–6.6

29

94

2

6

0.4

0.1–2.1

 > 10 vomits

10

63

6

38

5.5

1.5–20.5

16

100

0

0

1 omitted

Β 

Mucus in stools

 No mucus

63

90

7

10

1

Β 

68

93

5

7

1

Β 

 Patient reports mucus prior to admission

28

90

3

10

1.0

0.2–4.0

27

79

7

21

3.5

1.02–12.1

Adominal pain

 No pain

45

88

6

12

1

Β 

49

84

9

16

1

Β 

 Presense of abdominal pain

94

86

15

14

1.2

0.4–3.3

97

89

12

11

0.7

0.3–1.7

Travel

 No travel activity

108

87

16

13

1

Β 

110

85

19

15

1

Β 

 Travel within Northern Europe

10

77

3

23

2.0

0.5–8.1

13

93

1

7

0.4

0.1–3.6

 Travel within Southern and Eastern Europe

13

93

1

7

0.5

0.1–4.2

13

93

1

7

0.4

0.1–3.6

 Travel outside Europe

9

90

1

10

0.8

0.1–6.3

11

100

0

0

1 omitted

Β 

Antibiotic Treatment

 No antibiotic treatment

93

83

19

17

1

Β 

109

96

4

4

1

Β 

 Recently/at admission

13

93

1

7

0.4

0.1–3.1

10

63

6

38

16.4

3.9–67.7

 One week previous admission

11

100

0

0

1 omitted

Β 

8

67

4

33

13.6

2.8–64.9

 One month previous admission

11

92

1

8

0.4

0.1–3.7

7

54

6

46

23.4

5.3–102.4

 Two months previous admission

4

100

0

0

1 omitted

Β 

4

100

0

0

1 omitted

Β 

Contact to others with GE symptoms

 No contact to others

117

89

15

11

1

Β 

121

86

19

14

Β Β 

 Contact to others

16

76

5

24

2.4

0.8–7.6

21

100

0

0

1 omitted

Β 

Epidemic risk

 No other positive sample within the last week in the ED

104

90

11

10

1

Β 

113

86

18

14

1

Β 

 Other positive sample within the last week in the ED

37

79

10

21

2.6

1.0–6.5

35

90

4

10

0.7

0.2–2.3

Vital signs

 Systolic blood pressure

  100–140  mmHg

91

83

18

17

1

Β 

101

89

12

11

1

Β 

  > 140 mmHg

38

93

3

7

0.4

0.1–1.5

38

86

6

14

1.3

0.5–3.8

  < 100 mmHg

10

100

0

0

1 omitted

Β 

7

70

3

30

3.6

0.8. 16

Pulse

 60–100/min

96

84

18

16

1

Β 

109

91

11

9

1

Β 

 > 100/ min

30

91

3

9

0.5

0.1–2.0

28

80

7

20

2.5

0.8–6.9

 < 60/min

9

100

0

0

1 omitted

Β 

6

67

3

33

4.9

1.1–22.6

Temperature

 36.5–37.5 °C

66

92

6

8

1

Β 

66

86

11

14

1

Β 

 37.5–38.5 °C

35

80

9

20

2.8

0.9–8.5

39

89

5

11

0.7

0.2–2.3

 > 38.5 °C

18

86

3

14

1.8

0.4–8.0

21

95

1

5

0.3

0.03–2.3

 < 36.5 °C

18

86

3

14

1.8

0.4–8.0

19

86

3

14

0.9

0.2–3.7

  1. OR Odds Ratio, CI Confidence Intervall