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Table 3 Prevalence of the most common disorders at a fine-level of diagnostic precision recorded in Chihuahuas (n = 5660) under primary veterinary care at UK practices participating in the VetCompass™ Programme from January 1st to December 31st, 2016. The P-value reflects prevalence comparison between females and males. *CI confidence interval

From: Demography and commonly recorded clinical conditions of Chihuahuas under primary veterinary care in the UK in 2016

Fine-level disorderCountOverall prevalence %95% CI*Female prevalence %Male prevalence %P-ValueMedian age (years)
Periodontal disease76213.512.6–14.413.313.70.6505.2
Obesity3335.95.3–6.56.35.60.2644.4
Retained deciduous dentition3245.75.1–6.45.46.10.2691.6
Anal sac impaction2804.94.4–5.54.95.10.7283.8
Aggression2384.23.7–4.83.54.90.0083.5
Patellar luxation2244.03.5–4.54.23.70.3452.9
Cryptorchidism (males only)1103.93.2–4.6~~~1.6
Overgrown nail(s)1873.32.9–3.83.63.10.2793.7
Flea infestation1622.92.4–3.32.83.00.5962.9
Heart murmur1152.01.7–2.41.32.8<  0.0018.9
Anal sac infection1001.81.4–2.11.42.10.0534.1
Undesirable behaviour831.51.2–1.81.41.60.4852.5
Diarrhoea761.31.1–1.71.11.50.1892.2
Otitis externa741.31.0–1.60.91.70.0124.0
Lameness631.10.9–1.41.01.20.5712.5
Gastroenteritis611.10.8–1.41.11.10.9491.9
Vomiting611.10.8–1.41.11.10.9492.1
Dystocia (females only)311.10.8–1.6~~~2.8
Pruritus460.80.6–1.10.80.80.9553.0
Corneal ulceration460.80.6–1.10.90.70.5163.4
Conjunctivitis430.80.6–1.00.41.10.0041.7
Claw injury390.70.5–0.90.60.70.6673.1
Infectious canine tracheobronchitis360.60.4–0.90.50.80.1052.1
Upper respiratory tract infection360.60.4–0.90.40.90.0093.2
Dental disease350.60.4–0.90.60.60.9044.2
Alopecia330.60.4–0.90.50.60.6341.5
Melaena330.60.4–0.90.50.60.6342.7
Spinal pain310.60.4–0.80.40.70.1155.5