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Table 2 Logistic regression model of potential risk factors associated with seroprevalence to WNV and antigenically-related flaviviruses in red deer in Spain

From: Spatio-temporal trends and risk factors affecting West Nile virus and related flavivirus exposure in Spanish wild ruminants

Variable

Categories

B

P-value

OR

95 % CI

Year

2003

a

a

a

a

a

2004

−1.174

0.271

0.309

0.038

2.496

2005

−0.028

0.962

0.972

0.313

3.020

2006

0.294

0.525

1.342

0.542

3.322

2007

0.223

0.627

1.250

0.509

3.072

2008

0.430

0.332

1.538

0.645

3.669

2009

0.509

0.219

1.663

0.739

3.743

2010

0.386

0.355

1.471

0.649

3.335

2011

1.991

<0.001

7.320

3.404

15.739

2012

−0.741

0.487

0.477

0.059

3.851

2013

0.077

0.892

1.081

0.353

3.306

2014

0.608

0.447

1.837

0.383

8.822

Bioregion

1

a

a

a

a

a

2

0.602

0.605

1.826

0.186

17.946

3

1.913

0.060

6.777

0.920

49.903

4

1.784

0.115

5.954

0.648

54.709

5

2.192

0.034

8.957

1.180

67.990

Wetland area

Absence

a

a

a

a

a

Presence

1.097

<0.001

2.995

1.888

4.751

  1. aReference category