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Table 3 Food specific attack rates (AR) (uni – and multivariable analysis¤) for pooled food items (food pooled from October 31-November 2) among Nordic patients and workers ill on 2 and 3 November, 2002 at the health centre (n = 91) in Gran Canaria, Spain.

From: Gastro-enteritis outbreak among Nordic patients with psoriasis in a health centre in Gran Canaria, Spain: a cohort study

Food item

Food eaten

Food not eaten

Univariable

 

Multivariable

 

Cases N = 17

Total*

AR%

Cases

Total*

AR%

RR

95% C.I

% cases exposed

RR

95% C.I

Strawberry jam

8

24

33

9

63

14

2.3

1.0–5.3

47

1.9

0.9–4.1

Butter

7

28

25

10

59

17

1.5

0.6–3.5

41

  

Dried fruit

9

21

43

8

66

12

3.5

1.6–8.0

53

3.1

1.4–7.1

Apple

5

25

20

12

62

19

1.0

0.4–2.6

29

  

Pear

6

17

35

11

70

16

2.3

1.0–5.2

35

  

Full milk

4

10

40

13

77

17

2.4

1.0–5.7

24

  

Kiwi

5

21

24

12

66

18

1.3

0.5–3.3

29

  
  1. 4 responders did not remember what they ate
  2. ¤ Variables controlled for in the multivariable analysis: age, gender and the pooled variables with RR greater than 2.0 in the univariable analysis.