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Volume 10, Number 7—July 2004

Research

Sporadic Cryptosporidiosis Case-Control Study with Genotyping

Paul R. Hunter*Comments to Author , Sara Hughes†, Sarah Woodhouse†, Qutub Syed†, Neville Q. Verlander‡, Rachel M. Chalmers§, Kenton Morgan¶, Gordon Nichols†, Nick Beeching#, and Keith Osborn**
Author affiliations: *University of East Anglia, Norwich United Kingdom; †Communicable Disease Surveillance Centre – North West, Chester, United Kingdom; ‡Communicable Disease Surveillance Centre, London, United Kingdom; §Singleton Hospital, Swansea, United Kingdom; ¶University of Liverpool, Liverpool, United Kingdom; #Liverpool School of Tropical Medicine, Liverpool, United Kingdom; and; **United Utilities, Warrington, United Kingdom

Main Article

Table 4

Final multivariable model for Cryptosporidium parvum infectiona,b

Variables Adjusted OR 95% CI p value
Health authority



   A 1 < 0.001
   B 0.296 0.039–2.249
   C n.e. n.e.
   D 0.0001 0–∞
   E 0.0002 0–∞
   F 0.118 0.009–1.552
   G 0.0006 0–∞
   H 0.745 0.050–11.17
   I n.e. n.e.
   J 0.155 0.017–1.367
   K 0.00005 0–∞
   L 0.0002 0–∞
   M 0.981 0.136–7.082
   N 2.390 0.308–18.56
   O 0.0002 0–∞
   P 0.425 0.028–6.360
   Q n.e. n.e.
   R 1.239 0.186–8.260
   S 0.0001 0–∞
   T 0.643 0.043–9.545
   U
2.260
0.398–12.83

Age
0.993
0.972–1.015
0.530
Touch or handle any farm animals



   Y 2.653 1.113–6.323 0.028
   N
1.000


Eat tomatoes



   Y 0.317 0.140–0.719 0.005
   N
1.000


Eat raw vegetables



   Y 0.222 0.086–0.572 0.001
   N 1.000

aEstimated from 392 observations (55 case-patients and 337 controls).
bOR, odds ratio; CI, confidence interval; n.e., not estimable.

Main Article

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