From: A large waterborne outbreak of campylobacteriosis in Norway: The need to focus on distribution system safety
Exposure
Cases
Total exposed
AR %
RR (95% CI)
Fishers exact p
Holtålen waterworks
3
97
ref.
Røros waterworks
102
243
42
13.5 (4.4 – 41.7)
< 0.00001