Patterns of excess lymphoma by breed and age, comparing the observed numbers of lymphoma cases per breed, over four (quartile) age ranges, with expected numbers computed from age incidence.
Age ≤ 3
4 ≤ Age ≤ 6
7 ≤ Age ≤ 9
10 ≤ Age ≤ 14
No dogs by breed
O
E
O
E
O
E
O
E
Border collie
1
0.37
0
0.47
1
0.68
1
0.93
2378
Boxer
1
1.06
2
1.05
0.75
0.52
5628
Bulldog
0.38
0
0.24
0
0.10
0
0.006
1720
Bullmastiff
0
0.21
0.17
0
0.09
0
0.016
1075
CKCS
0
0.71
1
1.15
2
1.08
0
0.85
4529
Cocker spaniel
0
0.95
1
1.16
1
1.06
0
0.90
5568
Crossbred
2
1.01
1
2.06
4
4.03
4
5.13
8855
Dalmatian
1
0.37
0
0.34
0
0.20
0
0.20
1973
Doberman
1
0.34
0
0.30
0
0.43
1
0.54
2006
English springer spaniel
0
0.72
0
0.87
1
0.89
3
0.93
4308
German shepherd dog
0
2.14
1
2.36
1
2.33
1
1.82
12157
Golden retriever
1.02
3
2.78
1
2.40
6
2.86
11348
Irish setter
0
0.16
0.31
0
0.22
0
0.26
1123
Labrador retriever
2
2.84
2
3.20
2
2.89
1
3.02
16259
Miniature schnauzer
0
0.17
0
0.20
1
0.18
0
0.16
1007
Old English sheepdog
0
0.18
1
0.29
1
0.27
0
0.26
1086
Rottweiler
0
0.45
0
0.32
2
0.44
0
0.38
2446
Staffordshire bull terrier
0
0.51
0
0.39
1
0.47
1
0.38
2844
West Highland white terrier
0
1.07
0
1.15
0
0.99
1
0.81
6134
Other breeds
6
6.5
11
8.22
5
7.48
5
7.05
38240
Total
130684
O: observed, E: expected. Individually P ≤ 0.01 by Poisson distribution. Individually P ≤ 0.001 by Poisson distribution. Individually P ≤ 0.05 by Poisson distribution. Table from [158].
