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Volume 13, Number 3—March 2007
Research

Risk for Infection with Highly Pathogenic Influenza A Virus (H5N1) in Chickens, Hong Kong, 2002

Nina Y. Kung*†1Comments to Author , Roger S. Morris*, Nigel R. Perkins*, Les D. Sims‡, Trevor M. Ellis‡, Lucy Bissett‡, Mary Chow‡, Ken F. Shortridge‡, Yi Guan‡, and Malik J.S. Peiris‡
Author affiliations: *Massey University, Palmerston North, New Zealand; †University of Hong Kong, Pokfulam, Hong Kong Special Administrative Region, People’s Republic of China; ‡Department of Agriculture, Fisheries and Conservation, Kowloon, Hong Kong Special Administrative Region, People’s Republic of China;

Main Article

Table 4

Comparison of different multivariate models of risk factors for avian influenza type A virus (H5N1) infection among chicken farms, Hong Kong, 2002**

VariableCategoryOR (95% CI)
Model AModel BModel C
1
Owner lives off farm
37.04 (3.18–431.63)
12.64 (1.18–135.35)
45.84 (3.65–575.69)
2
Sell to retail markets
20.11 (1.47–274.98)
30.26 (2.26–405.09)
28.39 (2.30–350.40)
3
Highest death rate >30 d
17.37 (1.03–292.01)
20.51 (1.51–277.96)
24.28 (1.62–364.87)
4
Wild birds in feed trough
0.07 (0.01–0.85)


5
Chicken count

1.07 (1.01–1.12)

6
Relative in poultry industry


19.41 (1.46–257.74)
Cox and Snell R2
0.42
0.46
0.43
Nagelkerke R2
0.63
0.68
0.65
Significance of Hosmer and Lemeshow test
0.91
0.67
0.82
Degrees of freedom383

*OR, odds ratio; CI, confidence interval.

Main Article

1Current affiliation: AgriQuality Ltd, Lower Hutt, New Zealand

Page created: June 29, 2010
Page updated: June 29, 2010
Page reviewed: June 29, 2010
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.
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