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Table 4 Comparative prevalence values (%) for upper respiratory tract (URT) disorders recorded in three extreme brachycephalic breed types (Bulldog, French Bulldog, Pug) and three other breed types (moderate brachycephalic: Yorkshire Terrier, non-brachycephalic: Border Terrier, West Highland White Terrier) of dog attending primary-care veterinary practices in England (200 dogs of each breed type)

From: Epidemiological associations between brachycephaly and upper respiratory tract disorders in dogs attending veterinary practices in England

Variable Bulldog (n = 200) No. (%) French bulldog (n = 200) No. (%) Pug (n = 200) No. (%) Border terrier (n = 200) No. (%) West highland white terrier (n = 200) No. (%) Yorkshire terrier (n = 200) No. (%) P-value
Proportion of dogs with at least one URT disorder 39 (19.5) 40 (20.0) 53 (26.5) 18 (9.0) 14 (7.0) 26 (13.0) <0.001
Proportion of dogs with a URT disorder affecting this anatomic site        
Nares/Nasal Cavity 15 (7.5) 24 (12.0) 29 (14.5) 8 (4.0) 7 (3.5) 8 (4.0) <0.001
Hard and soft palate 5 (2.5) 6 (3.0) 8 (4.0) 0 (0.0) 0 (0.0) 0 (0.0) 0.001
Pharynx 2 (1.0) 2 (1.0) 4 (2.0) 1 (0.5) 2 (1.0) 1 (0.5) 0.695
Tonsil 0 (0.0) 3 (1.5) 0 (0.0) 0 (0.0) 0 (0.0) 1 (0.5) 0.051
Larynx 1 (0.5) 3 (1.5) 3 (1.5) 1 (0.5) 0 (0.0) 0 (0.0) 0.217
Trachea 7 (3.5) 12 (6.0) 11 (5.5) 10 (5.0) 8 (4.0) 20 (10.0) 0.074
BOAS (brachycephalic obstructive airway syndrome) 5 (2.5) 3 (1.5) 13 (6.5) 0 (0.0) 0 (0.0) 0 (0.0) <0.001
Multi-site URT 21 (10.5) 21 (10.5) 26 (13.0) 5 (2.5) 2 (1.0) 4 (2.0) <0.001