Table 6

Results from multivariable logistic regression: scenario 2 analyses (n = 270 farms)

Farm-level predictor

Predictor levelsa

ORb

lower 95% CIc

upper 95% CIc

p-value


Interceptd

-

0.603d

0.234

1.553

0.294


House count/Bird count

hbSSe

1

-

-

-

hbLS

0.148

0.016

1.352

0.091

hbSL

6.891

2.182

21.762

0.001

hbLL

6.224

2.246

17.247

<0.001


Integration status

Non-integratede

1

-

-

-

Integrated

0.442

0.212

0.922

0.030


Geographical location

Region: Northe

1

-

-

-

Region: East

0.510

0.200

1.301

0.159

Region: Scotland

0.045

0.005

0.396

0.005

Region: Wales

0.073

0.015

0.362

0.001

Region: West

0.050

0.019

0.130

<0.001


aSee tables 3 and 4 for definitions; bOR = odds ratio; cCI = confidence interval of the OR; daverage odds in the baseline predictor groups; ereference-level category; results significant at 5% error level are indicated in bold.

Nickbakhsh et al. BMC Veterinary Research 2011 7:66   doi:10.1186/1746-6148-7-66

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