Table 3 Risk factors for mast cell tumour (MCT) from final multivariable binary logistic regression model

Age

≤2.0 years

8

840

1(base)

<0.001

2.0-4.0 years

22

301

5.7

2.1-15.2

   0.001

4.0-6.0 years

60

245

15.9

6.2-40.4

<0.001

6.0-8.0 years

82

199

18.3

7.3-45.9

<0.001

8.0-10.0 years

95

171

38.3

15.1-97.4

<0.001

>10.0 years

108

267

41.3

16.7-102.5

<0.001

Breed type

Crossbred

65

391

1(base)

<0.001

Boxer

47

22

10.7

3.7-30.4

<0.001

Pug

7

15

10.0

1.5-64.5

   0.016

Staffordshire Bull terrier

72

159

4.2

2.2-8.2

<0.001

Golden Retriever

43

39

2.0

0.9-4.5

   0.080

Weimaraner

6

9

1.4

0.2-9.8

   0.718

Labrador Retriever

106

215

1.3

0.8-2.3

   0.319

Jack Russell Terrier

18

155

0.9

0.4-2.1

   0.790

Cocker Spaniel

4

86

0.3

0.1-0.9

   0.037

Springer Spaniel

8

50

0.3

0.1-0.9

   0.029

West Highland White Terrier

3

66

0.2

0.0-0.8

   0.030

Border Collie

3

60

0.1

0.0-0.5

   0.004

Yorkshire Terrier

2

57

0.1

0.0-1.0

   0.053

German Shepherd Dog

1

63

0.0

0.0-0.4

   0.007

Other specific breed type

68

649

0.4

0.3-0.7

   0.001

Insurance Status

Not Insured

162

1502

1(base)

Insured

291

527

3.1

2.2-4.5

<0.001

Neuter Status

Entire

130

102

1(base)

Neutered

323

820

0.1

0.1-0.2

<0.001

Weight

≤10.0 kg

49

771

1 (base)

   0.004

10.0-20.0 kg

60

379

1.1

0.6-2.1

   0.744

20.0-30.0 kg

145

296

2.6

1.4-4.8

   0.002

30.0-40.0 kg

135

197

2.5

1.3-4.9

   0.007

>40.0 kg

46

79

2.6

1.2-5.6

   0.017