Table 2 Risk factors associated with AIV H9 infection in LBRS of Lahore District, Pakistan, based on a forward stepwise selection process of selected variables with p ≤ 0.25 in univariable analysis.

From: Risk Factors for Avian Influenza H9 Infection of Chickens in Live Bird Retail Stalls of Lahore District, Pakistan 2009–2010

Potential Risk Factors

Odds ratio (OR)

Confidence Interval (CI95%) for OR

P-value

Source of birds

2.28

1.4–3.7

0.029

Housing of birds

3.10

1.4–7.0

0.052

Chicken breeds other than broiler

6.27

1.7–23.2

0.051

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