Table 4.
Breed distribution of dogs surgically treated for orthopaedic diseases and a geographically adjusted control group
| Breed | Eligible cases | Control population | ||||
|---|---|---|---|---|---|---|
| Sweden | Norway | Combined | Sweden | Norway | Combined | |
| N (%) | N (%) | N (%) | N (%) | N (%) | N (%) | |
| Mixed-breed | 114 (44.9) | 53 (30.1) | 167 (38.8) | 2964 (27.2) | 4359 (37.4) | 7323 (32.5) |
| Border collie | 8 (3.2) | 5 (2.8) | 13 (3.0) | 303 (2.8) | 425 (3.7) | 728 (3.2) |
| CKCS | 5 (2.0) | 9 (5.1) | 14 (3.3) | 522 (4.8) | 556 (4.8) | 1078 (4.8) |
| Chihuahua | 14 (5.5) | 18 (10.2) | 32 (7.4) | 1044 (9.6) | 985 (8.5) | 2029 (9.0) |
| English cocker spaniel | 1 (0.4) | 3 (1.7) | 4 (0.9) | 515 (4.7) | 539 (4.6) | 1054 (4.7) |
| Flat-coated retriever | 3 (1.2) | 4 (2.3) | 7 (1.6) | 433 (4.0) | 356 (3.1) | 789 (3.5) |
| German shepherd dog | 12 (4.7) | 7 (4.0) | 19 (4.4) | 1061 (9.7) | 591 (5.1) | 1652 (7.3) |
| Golden retriever | 17 (6.7) | 9 (5.1) | 26 (6.1) | 999 (9.2) | 754 (6.5) | 1753 (7.8) |
| Jack Russel terrier | 9 (3.5) | 6 (3.4) | 15 (3.5) | 430 (3.9) | 710 (6.1) | 1140 (5.1) |
| Labrador retriever | 32 (12.6) | 20 (11.4) | 52 (12.1) | 1277 (11.7) | 823 (7.1) | 2100 (9.3) |
| Rottweiler | 19 (7.5) | 22 (12.5) | 41 (9.5) | 502 (4.6) | 469 (4.0) | 971 (4.3) |
| Shetland sheepdog | 8 (3.2) | 7 (4.0) | 15 (3.5) | 475 (4.4) | 319 (2.7) | 794 (3.5) |
| Staff. bull terrier | 12 (5.8) | 13 (7.4) | 25 (5.8) | 394 (3.6) | 763 (6.6) | 1157 (5.1) |
| Total (BuS)* | 254 (51.2) | 176 (36.1) | 430 (43.7) | 10.525 (100.0) | 10.886 (100.0) | 21.411 (100.0) |
| Other breeds* | 242 (48.8) | 312 (63.9) | 554 (56.3) | |||
| Total | 496 (100.0) | 488 (100.0) | 984 (100.0) | |||
Control population calculated from registration numbers of each breed in the national ID-registries adjusted to reflect the source population of dogs surgically treated for orthopaedic diseases at the University Animal Hospital, Swedish University of Agricultural Sciences and the University Animal Hospital, Norwegian University of Life Sciences over a 5-year period
Data presented as number of dogs (percentage of breeds under study)
BuS Breeds under study, CKCS Cavalier king Charles spaniel
*Data presented as number of dogs (percentage of total)