Table 4 Multivariable logistic regression results for variables that replaced breed

Purebred status

Crossbred

Base

Purebred

2.23

1.84–2.87

< 0.001

Spaniel-brachycephalic

Crossbred

Base

Spaniel

3.13

2.38–4.12

< 0.001

Brachycephalic

11.18

8.72–14.32

< 0.001

Purebred other

1.42

1.12–1.79

0.003

Kennel Club Breed Groups

Breed not Kennel Club recognised

Base

Toy

3.52

2.82–4.39

< 0.001

Utility

3.99

3.16–5.03

< 0.001

Terrier

1.83

1.44–2.35

< 0.001

Gundog

0.97

0.75–1.25

0.811

Hound

1.04

0.66–1.64

0.860

Pastoral

0.83

0.56–1.22

0.343

Working

3.64

2.76–4.79

< 0.001

Adult (> 9 months) bodyweight (kg)

< 10.0

1.88

1.47–2.41

< 0.001

10.0–19.9

1.70

1.33–2.18

< 0.001

20.0–29.9

1.26

0.96–1.64

0.090

30.0–39.9

Base

≥ 40.0

0.69

0.45–1.05

0.086

Not available

0.73

0.53–1.02

0.064