Table 2 Prevalence of the most common disorders at a fine-level of diagnostic precision recorded in Shih Tzus (n = 2,423) attending UK primary-care veterinary practices participating in the VetCompass™ Programme from January 1^st, 2016 to December 31^st, 2016

Periodontal disease

229

9.5

8.4–10.7

10.5

8.4

0.080

6.8

Anal sac impaction

180

7.4

6.5–8.5

7.9

7.0

0.399

4.9

Ear disorder

134

5.5

4.7–6.5

4.7

6.4

0.058

4.2

Otitis externa

114

4.7

3.9–5.6

5.5

3.9

0.059

4.7

Vomiting

107

4.4

3.7–5.3

4.3

4.5

0.807

3.5

Overgrown nail(s)

103

4.3

3.5–5.1

3.8

4.6

0.337

3.7

Umbilical hernia

94

3.9

3.2–4.7

4.8

3.0

0.018

1.4

Post-operative complication

91

3.8

3.1–4.6

3.3

4.2

0.260

1.9

Obesity

86

3.5

2.9–4.4

3.5

3.6

0.863

4.4

Ulcerative keratitis (Corneal ulceration)

85

3.5

2.8–4.3

3.4

3.6

0.776

5.6

Diarrhoea

71

2.9

2.3–3.7

3.6

2.3

0.064

3.6

Flea infestation

62

2.6

2.0–3.3

2.8

2.2

0.344

3.6

Retained deciduous tooth

62

2.6

2.0–3.3

2.2

2.9

0.322

1.6

Aggression

59

2.4

1.9–3.1

1.5

3.2

0.005

4.5

Pododermatitis

56

2.3

1.8–3.0

1.7

2.9

0.064

3.6

Pruritus

56

2.3

1.8–3.0

2.7

2.0

0.263

3.2

Atopic dermatitis

54

2.2

1.7–2.9

2.2

2.2

0.971

4.9

Undesirable behaviour

53

2.2

1.7–2.9

2.3

2.1

0.650

3.5

Skin disorder

53

2.2

1.7–2.9

2.2

2.2

0.918

6.4

Ocular discharge

51

2.1

1.6–2.8

1.8

2.4

0.340

4.4

Heart murmur

51

2.1

1.6–2.8

1.5

2.7

0.037

11.4

Skin lesion(s)

51

2.1

1.6–2.8

1.5

2.7

0.037

3.9

Conjunctivitis

49

2.0

1.5–2.7

1.7

2.4

0.206

5.4

Haircoat disorder

49

2.0

1.5–2.7

1.2

2.8

0.007

4.2

Dental disease

46

1.9

1.4–2.5

1.4

2.4

0.080

7.7

Anorexia

45

1.9

1.4–2.5

2.3

1.4

0.091

4.1

Corneal disorder

45

1.9

1.4–2.5

1.6

2.1

0.308

6.4

Skin mass

42

1.7

1.3–2.3

1.4

2.1

0.225

5.5

Pyotraumatic dermatitis

38

1.6

1.2–2.2

1.2

2.0

0.109

2.5

Pyoderma

38

1.6

1.2–2.2

1.2

1.8

0.259

4.9

Skin cyst

38

1.6

1.2–2.2

1.7

1.5

0.720

6.4

Lameness

37

1.5

1.1–2.1

1.2

1.8

0.259

5.9

Mandibular prognathism

33

1.4

1.0–1.9

1.7

1.1

0.209

2.1

Anal sac infection

31

1.3

0.9–1.8

1.3

1.2

0.835

5.9

Keratoconjunctivitis sicca (KCS)

30

1.2

0.9–1.8

1.3

1.2

0.693

9.4

Wound

30

1.2

0.9–1.8

1.2

1.2

0.978

4.5

Gastroenteritis

29

1.2

0.8–1.7

1.1

1.3

0.594

3.2

Ophthalmic disorder

27

1.1

0.8–1.6

1.2

1.0

0.544

7.2

Claw injury

26

1.1

0.7–1.6

0.9

1.2

0.445

5.0

Thin

21

0.9

0.6–1.3

0.7

1.0

0.526

3.1