Table 2 Odds ratio for risk factors associated with the occurrence EL

Age (years)

3–6

1

1

above 6

7.359

2.73– 19.83

< 0.001

1.996

9.660

3.21–29.11

< 0.001

2.269

Body condition

Poor

1

1

Moderate

0.939

0.16– 5.59

0.945

-0.06

0.770

0.10–5.68

0.797

-0.262

Good

0.157

0.03– 0.79

0.024

-1.84

0.105

0.02–0.66

0.016

-2.253

Clinical condition

apparently healthy

1

1

with EL lesion

3.552

14.62–83.18

< 0.001

3.552

30.309

11.17–82.23

< 0.001

3.411