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Volume 8, Number 3—March 2002

Research

Associations between Indicators of Livestock Farming Intensity and Incidence of Human Shiga Toxin-Producing Escherichia Coli Infection

James E. Valcour, Pascal Michel†, Scott A. McEwen, and Jeffrey B. Wilson‡Comments to Author 
Author affiliations: University of Guelph, Guelph, Ontario, Canada; †Université de Montréal, St-Hyacinthe, Québec, Canada; ‡University of Guelph, Guelph, Ontario, and Centre for Infectious Disease Prevention and Control, Health Canada, Ottawa, Ontario, Canada;

Main Article

Table 4

Multivariable spatial Poission regression models for predicting incidence of human shiga-toxin-producing Escherichia coli infection, Ontario, 1996-1998

Variable Estimate S.E. p-value r2
Intercept
HUMBCOWa
PIGFARMb
SMANCCSc
LSMANCRPd 1.04
0.65
-0.003
4.19
7.82 0.18
0.13
0.001
1.86
2.47 <0.001
<0.001
0.04
0.03
0.002 0.2655

aRatio of no. beef cattle to human population in a consolidated census subdivision (CCS).
bTotal no. of swine per km2 of farmland in a CCS.
cProportion in a CCS having manure applied to land surface via solid spreader.
dProportion in a CCS having manure applied to land surface via liquid spreader.

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