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and insurance research get their information from veterinary practices and offer huge potential for health information that is representative of the cared-for pet populations. Veterinarians must recognize their crucial role in producing such data and do their best to record complete and accurate information. For example, when veterinarians accept respiratory abnormalities in brachycephalic breeds as ‘normal for the breed’ and therefore do not record them, then disorder prevalence
An Urban Experience
estimates based on these data will not reflect the true situation.
Breed-specific prevalence and risk is both a science and an art: we live in an unprecedented era for the development of both.
Table 1. Prevalence results for the most frequent disorders recorded in dogs attending primary veterinary practices in England. P-values comapre purebreds and crossbreds. Reproduced from (7)
  Overall
 Purebred
 Crossbred
  Disorder
  No.
   Preva %
  95% CIb
    Preva %
  95% CIb
    Preva %
  95% CIb
    P-value
  Otitis externa
  396
 10.2
9.1-11.3
  11.2
10.0-12.4
  6.5
4.7-8.3
  0.001
  Periodontal disease
   361
  9.3
 8.3-10.3
   9.4
 8.2-10.5
   9.2
 7.4-11.0
   1.000
  Anal sac impaction
   277
  7.1
 6.1-8.1
   7.1
 6.0-8.1
   7.5
 5.7-9.4
   1.000
  Overgrown nails
    276
   7.1
  6.1-8.2
    6.9
  5.8-8.0
    8.0
  6.1-9.9
    1.000
  Degenerative joint disease
  256
 6.6
5.7-7.5
  6.4
5.3-7.4
  7.5
5.7-9.4
  1.000
  Diarrhoea
   249
  6.4
 5.5-7.4
   6.8
 5.6-8.0
   4.9
 3.4-6.4
   0.255
  Obesity
   238
  6.1
 5.2-7.1
   6.7
 5.6-7.9
   3.9
 2.3-5.5
   0.006
  Traumatic injury
    214
   5.5
  4.7-6.4
    5.5
  4.4-6.5
    5.7
  3.6-7.7
    1.000
  Conjunctivitis
  192
 4.9
4.1-5.8
  5.2
4.2-6.2
  4.1
2.8-5.5
  1.000
  Vomiting
   159
  4.1
 3.3-4.9
   4.0
 3.1-4.9
   4.5
 3.0-6.0
   1.000
  Heart murmur
    153
   3.9
  3.3-4.5
    4.1
  3.5-4.7
    3.4
  2.1-4.7
    1.000
  Lipoma
  137
 3.5
2.8-4.2
  3.5
2.7-4.2
  3.8
2.7-4.9
  1.000
  Dermatitis
   134
  3.5
 2.8-4.1
   3.5
 2.8-4.3
   3.1
 1.9-4.4
   1.000
  Skin hypersensitivity
   113
  2.9
 2.3-3.5
   3.2
 2.5-3.9
   1.8
 0.9-2.6
   0.116
  Skin mass
    110
   2.8
  2.3-3.4
    3.2
  2.6-3.8
    1.5
  0.6-2.4
    0.033
  Claw injury
  103
 2.7
2.1-3.2
  2.6
2.0-3.2
  2.6
1.5-3.8
  1.000
  Behavioural
   99
  2.6
 2.1-3.0
   2.6
 2.1-3.1
   2.4
 1.4-3.4
   1.000
  Gastroenteritis
   99
  2.6
 2.0-3.1
   2.4
 1.9-2.9
   3.1
 2.0-4.3
   1.000
  Dog bite injury
    97
   2.5
  1.9-3.1
    2.4
  1.7-3.1
    2.9
  1.8-4.0
    1.000
  Laceration
   92
  2.4
 1.8-2.9
   2.5
 1.8-3.1
   2.0
 1.1-2.9
   0.446
 aPrev prevalence
b95% CI 95% confidence interval
479
                   
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