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Table 1 Attack rates, attributable risks and relative risks for specific foods.

From: Foodborne norovirus outbreak: the role of an asymptomatic food handler

 

Exposed

Not exposed

  

Food

Ill

(n)

Not ill

(n)

Attack Rate

(%)

Ill

(n)

Not ill

(n)

Attack Rate

(%)

Attributable

Risk

Relative Risk

(95% CI)

Paella

38

35

52.0

4

1

80.0

-28.0

0.65 (0.39 - 1.06)

Round of Beef

42

34

55.3

0

2

0.0

55.3

3.31* (0.26 - 41,92)

  1. July 2005.
  2. *0.5 is added to all frequencies.